Accudynetest logo

Products available online direct from the manufacturer

ACCU DYNE TEST ™ Bibliography

Provided as an information service by Diversified Enterprises.

3040 results returned
showing result page 76 of 76, ordered by

2926. no author cited, “What is the best fast & accurate alternative to dyne testing?,” Brighton Science, Aug 2019.

2927. no author cited, “How to control additive blooming in polymer films,” Brighton Science, Jun 2020.

2937. no author cited, “Standard T565: Contact angle of water droplets on corona-treated polymer film surfaces,” TAPPI, 1996.

2938. no author cited, “ASTM D724: Standard test method for surface wettability of paper (angle-of-contact method),” ASTM, 1994.

2939. no author cited, “Determination of the surface tension between a printing ink and fountain water during the offset process (Application note 3),”,

2940. no author cited, “Optimisation of the determination of surface free energies of polymers (Application note 4),”,

2941. no author cited, “Simplified determination of the surface free energy of polymers (Application note 6),”,

2942. no author cited, “Determination of contact angles by different methods of dropshape analysis (Application note 12),”,

2943. no author cited, “Calculation of a new reference liquid by measurement on a known solid surface (Application note 17),”,

2944. no author cited, “Dynamic contact angle measurements on curved surfaces by using the bridge-function (Application note 22),”,

3002. no author cited, “Single vs. multi-fluid contact angle techniques part 1: Surface energy and the attractions between substances,” Brighton Science, May 2020.

3003. no author cited, “Single vs. multi-fluid contact angle techniques part 2: Why one fluid is all you need for process control in manufacturing,” Brighton Science, May 2020.

3004. no author cited, “What is the difference between surface free energy and surface energy?,” Brighton Science, Mar 2021.

3005. no author cited, “What is the difference between surface tension and surface energy,” Brighton Science, Mar 2021.

3006. no author cited, “Why a surface chemistry input should be included in new product specifications,” Brighton Science, Nov 2022.

3007. no author cited, “Demystifying dyne levels: A comprehensive guide,” Brighton Science, Aug 2023.

3008. no author cited, “The water break test as a surface measurement gauge,” Brighton Sciencce, Oct 2023.

3019. no author cited, “Why test inks cannot tell the full truth about surface free energy,” Kruss Application Report AR272, Jun 2014.

3023. no author cited, “What is dyne testing?,” Brighton Science, Oct 2023.

2206. no author cited:, “Surface treatment trouble shooting: What is the formula to calculate watt density?,”,

654. van Damme, H.S., A.H. Hogt, and J. Feijen, “Surface mobility and structural transitions of poly(n-alkyl methacrylates) probed by dynamic contact angle measurement,” in Polymer Surface Dynamics, Andrade, J.D., ed., 89-110, Plenum Press, 1988.

371. van Ness, K.E., “Surface tension and surface entropy for polymer liquids,” Polymer Engineering and Science, 32, 122-129, (Jan 1992).

A cell theory for the prediction of the surface tension of polymer liquids is modified to include an entropic effect due to molecular asymmetry. Also considered is the extent of the effect of the preservation of connectivity in the vicinity of the surface upon the potential energy zero term due to missing nearest neighbors of orders greater than one. Theory and experiment are in good agreement without an adjustable surface parameter.

798. van Ooij, W.J., S. Luo, E. Mader, and K. Mai, “Improved rubber adhesion to textile tire cords by deposition of plasma-polymerized films,” in Polymer Surface Modification: Relevance to Adhesion, Vol. 2, K.L. Mittal, ed., 225-242, VSP, Dec 2000.

Aramid cords and fibers and polyester tire cords were treated in a continuous or pulsed DC plasma containing organic monomers such as pyrrole or acetylene in a custom-built reactor. For the treated cords the rubber adhesion was measured in a standard pull-out test. It was found that the plasma polymer coating significantly increased the pull-out forces. The effect of the power-to-pressure ratio and the pulsing of DC power on the performance of the treated cords or fibers were investigated. It was found that, in general, low power / high pressure conditions gave better results than high power / low pressure conditions. Coatings obtained under these conditions were thoroughly characterized by a range of analytical tools. Based on these data and on failure analysis, models were developed to explain the experimental findings.

662. van Ooij, W.J., and H.R. Anderson Jr., eds., First International Congress on Adhesion Science and Technology: Festschrift in Honor of Dr. K.L. Mittal on the Occasion of his 50th Birthday, VSP, 1998.

586. van Ooij, W.J., et al, “Plasma-polymerized organic coatings deposited on metals from a DC plasma; characterization and applications of such surface modifications,” in ANTEC 95, Society of Plastics Engineers, Apr 1995.

655. van Oss, C.J., “Acid-base effects at polymer interfaces,” in Polymer Surfaces and Interfaces II, Feast, W.J., H.S. Munro, and R.W. Richards, eds., 267-286, John Wiley & Sons, Apr 1993.

781. van Oss, C.J., “Acid-base interactions as the driving force for both hydrophobic attraction and hydrophilic repulsion,” in Acid-Base Interactions: Relevance to Adhesion Science and Technology, Vol. 2, K.L. Mittal, ed., 173-180, VSP, Dec 2000.

1260. van Oss, C.J., “Use of the combined Lifschitz-van der Waals and Lewis acid-base approaches in determining the apolar and polar contributions to surface and interfacial tensions and free energies,” J. Adhesion Science and Technology, 16, 669-677, (2002).

Recently, a number of authors have been rearranging the various combinations and permutations of the different apolar and polar liquids with which contact angles can be measured on polar surfaces and in so doing have arrived at bizarre results. The rational order and procedures to be followed in the determination of the apolar and polar surface tension properties of polar materials, according to the van Oss-Chaudhury-Good components and parameters of the approach, are reiterated.

1339. van Oss, C.J., Interfacial Forces in Aqueous Media, 2nd Ed., CRC Press, May 2006.

2284. van Oss, C.J., L. Ju, M.K. Chaudhury, and R.J. Good, “Estimation of the polar parameters of the surface tension of liquids by contact angle measurements on gels,” J. Colloid and Interface Science, 128, 313-319, (Mar 1989).

In a previous paper it was shown that negative interfacial tensions between predominantly monopolar surfaces (i.e., surfaces with mainly H-acceptor properties) and polar liquids are real phenomena. Such negative interfacial tensions do however decay rapidly. For miscible liquids, the decay of the interface is, in general, so rapid that it practically excludes measurement of interfacial tension. However, if one liquid is present in the form of a gel, and if the other liquid is placed as a drop upon the gel, there is often enough time to measure contact angles. This may be done at various concentrations of the liquid encased in the gel, and an extrapolation made to zero concentration of the gelling agent. With this method we found the existence of negative interfacial tensions at liquid/liquid interfaces.

373. van Oss, C.J., M.K. Chaudhury, and R.J. Good, “Interfacial Lifschitz-van der Waals and polar interactions in macroscopic systems,” Chemical Review, 88, 927-941, (1988).

apolar interactions in macroscopic systems, cell separation methods. the nature of the interaction between antigens and antibodies. and physicochemical and immunochemical cell surface characterization.

1827. van Oss, C.J., M.K. Chaudhury, and R.J. Good, “Monopolar surfaces,” Advances in Colloid and Interface Science, 28, 35-64, (1987).

Following the development of a methodology for determining the apolar components as well as the electron donor and the electron acceptor parameters of the surface tension of polar surfaces, surfaces of a number of quite common materials were found to manifest virtually only electron donor properties and no, or hardly, any electron acceptor properties. Such materials may be called monopolar; they can strongly interact with bipolar materials (e.g., with polar liquids such as water); but one single polar parameter of a monopolar material cannot contribute to its energy of cohesion. Monopolar materials manifesting only electron acceptor properties also may exist, but they do not appear to occur in as great an abundance. Among the electron donor monopolar materials are: polymethylmethacrylate, polyvinylalcohol, polyethyleneglycol, proteins, many polysaccharides, phospholipids, nonionic surfactants, cellulose esters, etc.

Strongly monopolar materials of the same sign repel each other when immersed or dissolved in water or other polar liquids. The interfacial tension between strongly monopolar surfaces and water has a negative value. This leads to a tendency for water to penetrate between facing surfaces of a monopolar substance and hence, to repulsion between the molecules or particles of such a monopolar material, when immersed in water, and thus to pronounced solubility or dispersibility. Monopolar repulsion energies can far outweigh Lifshitz-van der Waals attractions as well as electrostatic and “steric” repulsions. In aqueous systems the commonly observed stabilization effects, which usually are ascribed to “steric” stabilization, may in many instances be attributed to monopolar repulsion between nonionic stabilizing molecules. The repulsion between monopolar molecules of the same sign can also lead to phase separation in aqueous solutions (or suspensions), where not only two, but multiple phases are possible. Negative interfacial tensions between monopolar surfactants and the brine phase can be the driving force for the formation of microemulsions; such negative interfacial tensions ultimately decay and stabilize at a value very close to zero.

Strongly monopolar macromolecules or particles surrounded by oriented water molecules of hydration can still repel each other, albeit to an attenuated degree. This repulsion was earlier perceived as caused by “hydration pressure”.

A few of the relevant colloid and surface phenomena are reviewed and re-examined in the light of the influence of surface monopolarity on these phenomena.

1660. van Oss, C.J., R.F. Giese, and R.J. Good, “Re-evaluation of the surface tension components and parameters of polyacetylene from contact angles of liquids,” Langmuir, 6, 1711-1713, (1990).

1826. van Oss, C.J., R.J. Good, and H.J. Busscher, “Estimation of the polar surface tension parameters of glycerol and formamide, for use in contact angle measurements on polar solids,” J. Dispersion Science and Technology, 11, 75-81, (Feb 1990).

By measuring contact angles with water, glycerol and formamide on a number of polar surfaces, an estimate could be made of the electron-acceptor (γ+ ) and the electron-donor (γ ) parameters of glycerol (G) and formamide (F), relative to the parameters of. water (W), for which a reference value of γ+ W = γ W = 25.5 mJ/m2 has been assumed. The values thus found are: γ+ G ≈ 3.92 mJ/m2 (which yields γ G ≈ 57.4 mJ/m2) and γ+ F ≈2.28 mJ/m2 (which yields γ F ≈ 39.6 mJ/m2).

372. van Oss, C.J., R.J. Good, and M.K. Chaudhury, “The role of van der Waals forces and hydrogen bonds in 'hydrophilic interactions' between biopolymers and low energy surfaces,” J. Colloid and Interface Science, 111, 378-390, (1986).

The thermodynamic nature of interfaces and of adhesion is reexamined in the light of the Lifshitz theory of the forces acting across condensed phases. A new term is proposed, γLW, which consists of the sum of the terms heretofore ascribed to London, Debye, and Keesom forces, LW referring to Lifshitz-van der Waals. This term and a second term γSR account for the entirety of two-phase interactions in nonionic systems; SR refers to short range forces. This new analysis of forces is of value in explaining some important biological and other phenomena. The rather strong attachment of hydrophilic proteins, e.g., human serum albumin (HSA) and human immunoglobulin G (IgG), to low energy surfaces, e.g., polytetrafluoroethylene (PTFE) and polystyrene (PST), while immersed in H2O, cannot be ascribed solely to Lifshitz-van der Waals forces (LW). For instance, it can be shown that the LW interaction would give rise to a repulsion between HSA and PTFE. The short range (SR) interactions, e.g., between H2O and HSA, are due to H-bonds, which cannot directly account for interactions with PTFE. However, the combined SR interfacial tensions between the H-bonding liquid, the biopolymer, and the low energy surface still result in a strong attraction between PTFE and HSA, immersed in H2O. This is analogous to the behavior of a liquid-air interface (where the fact that the direct interaction between a given solute and air is zero does not preclude the solute from being preferentially attracted to the interface). This SR attraction (minus the LW repulsion) between HSA and PTFE, in H2O, is of the same order of magnitude as the adsorption energy derived from the Langmuir isotherm obtained for this system. Analogous results are found with IgG and PTFE, and also with HSA and IgG, with PST. Desorption patterns (obtained by changing the γLW and γSR of the liquid medium) allow an insight into the degree of local dehydration (or “denaturation”) of adsorbed proteins under various conditions. It is suggested that the term interfacial forces more aptly describes the underlying mechanism than “hydrophobic interactions.”

1982. van Oss, C.J., R.J. Good, and M.K. Chaudhury, “Additive and non-additive surface tension components and the interpretation of contact angles,” Langmuir, 4, 884-891, (Jul 1988).

700. van Oss, C.J., W. Wu, and R.F. Giese, “Lifshitz-van der Waals, Lewis acid-base and electrostatic interactions in adhesion in aqueous media,” in First International Congress on Adhesion Science and Technology: Festschrift in Honor of Dr. K.L. Mittal on the Occasion of his 50th Birthday, W.J. van Ooij and H.R. Anderson Jr., eds., 49-62, VSP, Dec 1998.

Lifshitz-van der Waals (LW) and Lewis acid-base (AB), together with electrostatic (EL) forces are the non-covalent forces acting in adhesion in condensed phase media, such that the work of adhesion, VEadh= WLW+ WAB+ WEL. In the case of serum albumin (SA) and glass surfaces or silica particles, on a macroscopic scale, WEW> 0, WAB< 0 and WEL< 0, so that W'ddh is negative, ie repulsive. Nonetheless, in aqueous media, at neutral pH, SA adheres to glass surfaces, as well as to silica particles. It may be hypothesized that on a microscopic level, negatively charged, electron-donating SA moieties, located on prominent sites with a small radius of curvature, can penetrate the macroscopic repulsion field and bind to electron-accepting cations imbedded in the glass surfaces (Ca ions) or in silica particles (Si ions). The correctness of the hypothesis is supported by the fact that all adhering SA can be desorbed from, say, silica particles with Na2-EDTA. Furthermore, energy vs. distance diagrams demonstrate that the more prominently located SA sites with a small radius of curvature should indeed be able to overcome the macroscopic repulsion field and to adhere locally to microscopic cationic sites in the glass or silica. Thus, energy vs. distance balances of the extended DLVO type (including AB as well as LW and EL forces), combining macroscopic and microscopic interactions, can be used to predict adhesion in complex systems.

1659. van Oss, C.J., and R.J. Good, “Surface tension and the solubility of polymers and biopolymers: the role of polar and apolar interfacial free energies,” J. Macromolecular Science, A26, 1183-1203, (1989).

Surface tension data can be used for estimating the solubility of polymers in liquids. By determining the apolar and the polar components of the surface tension of polymers and of solvents, the attractive free energy, δG121, of a polymer (1) in a given solvent (2) can be established. By also taking into account the contactable surface area of two polymer molecules, immersed in a liquid, δG121 can be expressed in units of kT. Solubility then is favored when -1.5 kT < δG121 < 0 for apolar systems, and when -1.5 kT < δG121 for polar systems. In polar solvents, hydrogen bonding can often increase δG121 from <-1.5 kT to > + 1.5 kT. Positive values are frequently attained and this strongly shifts the behavior from insolubility to solubility. A number of proteins exemplify this behavior.

2097. van der Leeden, M.C., and G. Frens, “Surface properties of plastic materials in relation to their adhering performance,” Advanced Engineering Materials, 4, 280-289, (2002).

Adhesion between polymeric phases like adhesives and plastic surfaces is critical in many technological and industrial applications. In the last decades much progress has been made to understand the impact of the surface properties of both phases on the adhesive strength between them. These surface properties influence processes like wetting, molecular adsorption and inter-diffusion which determine how an interface develops into an interphase after the two materials have been brought into contact. Ultimately, the properties of this interphase determine the overall adhesion strength of an assembly. In this paper important parameters in the adhesion process will be reviewed, including methods to engineer these parameters in order to attain adhesion strengths ranging from complete release to irreversible bonding.

1584. von Arnim, V., T. Stegmaier, D. Praschak, T. Bahners, A. Lunk, et al, “Continuous plasma treatment of textiles under atmospheric pressure,” in Proceedings of the 29th Aachen Textile Conference, DWI an der RWTH Aachen University, 2002.


<-- Previous | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | Next-->