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|Title:||Surface photodegradation and modification of some substituted polyacetylene films|
|Authors:||Kang, E.T. |
|Source:||Kang, E.T.,Neoh, K.G.,Tan, K.L.,Liaw, D.J. (1993). Surface photodegradation and modification of some substituted polyacetylene films. Polymer Degradation and Stability 40 (1) : 45-52. ScholarBank@NUS Repository.|
|Abstract:||Surface photodegradation and surface modification by graft copolymerization have been carried out on films of two substituted polyacetylenes, viz. poly((o-(trimethylsilyl)phenyl)acetylene) or poly(o-Me3SiPA) and poly(1-chloro-2-phenylacetylene) or PCPA. X-ray photoelectron spectroscopy (XPS) data indicate that surface degradation induced by near-UV light in the former involves oxidation of the Si hetero-atoms to the Si-O species, whereas the latter polymer photodegrades via the loss of the Cl hetero-atoms. The surface photodegradation processes in both polymers are facilitated by the presence of O2 and H2O. Both polymer films undergo near-UV induced graft copolymerization with acrylamide (AAm), acrylic acid (AAc), Na salt of styrene sulfonic acid (NaSS) and 3-dimethyl(methacryloyloxyethyl) ammonium propane sulfonate (DMAPS) to give more hydrophilic surfaces. The graft density in each case is substantially enhanced for polymer films pre-treated with Ar plasma. Near-UV light induced graft copolymerization in all cases also results in the surface photodegradation of the two acetylene polymer films. © 1993.|
|Source Title:||Polymer Degradation and Stability|
|Appears in Collections:||Staff Publications|
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