Critical Surface Tension and Contact Angle with Water for Various Polymers

ID #(1)
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Polymer Name(2)
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CAS #(3)
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γS(4)
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Contact Angle(5)
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1 Acrylonitrile butadiene styrene (ABS) 9003-56-9 38.5 80.9
2 Epoxies - 44.5 76.3
3 Fluorinated ethylene propylene (FEP) 25067-11-2 19.1 108.5
4 Hexatriacontane 630-06-8 20.6 108.5
10 Nylon 10,10 - 32 94
11 Nylon 11 25587-80-8 35.6 82
12 Nylon 12 24937-16-4 37.1 72.4
5 Nylon 6 (polycaprolactum, aramid 6) 25038-54-4 43.9 62.6
6 Nylon 6,6 32131-17-2 42.2 68.3
7 Nylon 7,7 - 43 70
8 Nylon 8,8 - 34 86
9 Nylon 9,9 - 34 86
13 Paraffin 8002-74-2 24.8 108.9
15 Poly n-butyl methacrylate (PnBMA) 25608-33-7 29.8 91
16 Poly t-butyl methacrylate (PtBMA) 25189-00-9 18.1 108.1
23 Poly(hexafluoropropylene) - 16.9 112
14 Polybutadiene 9003-17-2 29.3 96
17 Polycarbonate (PC) 24936-68-3 44 82
18 Polychlorotrifluoroethylene (PCTFE) 9002-83-9 30.8 99.3
19 Polydimethylsiloxane (PDMS) 9016-00-6 20.1 107.2
20 Polyethylene (PE) 9002-88-4 31.6 96
21 Polyethylene oxide (PEO, PEG, polyethylene glycol) 25322-68-3 43 63
22 Polyethylene terephthalate (PET) 25038-59-9 39 72.5
24 Polyisobutylene (PIB, butyl rubber) 9003-27-4 27 112.1
25 Polymethyl methacrylate (PMMA, acrylic, plexiglas) 9011-14-7 37.5 70.9
26 Polyoxymethylene (POM, polyacetal, polymethylene oxide) 24969-26-4 37 76.8
27 Polyphenylene sulfide (PPS) 26125-40-6 38 80.3
28 Polypropylene (PP) (a) 30.5 102.1
29 Polystyrene (PS) 9003-53-6 34 87.4
30 Polysulfone (PSU) 25135-51-7 42.1 70.5
31 Polytetrafluoroethylene (PTFE) 9002-84-0 19.4 109.2
32 Polytrifluoroethylene 24980-67-4 26.5 92
33 Polyvinyl acetate (PVA) 9003-20-7 35.3 60.6
34 Polyvinyl alcohol (PVOH) 25213-24-5 37 51
35 Polyvinyl chloride (PVC) 9002-86-2 37.9 85.6
36 Polyvinyl fluoride (PVF) 24981-14-4 32.7 84.5
37 Polyvinylidene chloride (PVDC, Saran) 9002-85-1 40.2 80
38 Polyvinylidene fluoride (PVDF) 24937-79-9 31.6 89

(1) ID numbers identify polymer data points in critical surface tension vs. contact angle chart.

(2) Names which are most widely used to describe the material or family of materials (e.g., polyurethanes and epoxies) at hand are preferred here. Commonly used acronyms and synonyms are also shown. To top of page

(3) CAS (Chemical Abstract Series) numbers are shown where available. In a number of instances, more than one CAS number is assigned to a given polymer — in some cases the details and nuances of these divergences are not at all clear. We have tried to reference the CAS number which appears to have the widest use with reference to the solid state properties of the given polymer . To top of page

(4) Critical surface tension in mJ/m2 (equivalent to dynes/cm), generally determined by the Zisman method (regression of the cosine of the contact angle), or by the wetting tension method (using solutions of 2-ethoxyethanol and formamide, per ASTM Std. D-2578). To top of page

(5) Contact angle with water, in degrees. The arithmetic mean of all equilibrium (Young's) and advancing contact angle measurements is shown. Generally, the equilibrium angle is similar to, but slightly lower than, the advancing angle; the balance of equilibrium vs. advancing contact angles from which this summary is drawn may have some effect on the average as shown for some polymers. To top of page

Contact Angle with Water vs. Critical Surface Tension for Various Polymers