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|Title:||Miscibility and interactions in blends of carboxyl-containing polysiloxane with poly(1-vinylimidazole)|
|Citation:||Li, X., Goh, S.H., Lai, Y.H., Wee, A.T.S. (2001). Miscibility and interactions in blends of carboxyl-containing polysiloxane with poly(1-vinylimidazole). Polymer 42 (12) : 5463-5469. ScholarBank@NUS Repository. https://doi.org/10.1016/S0032-3861(01)00015-5|
|Abstract:||The miscibility of poly(3-carboxypropylmethylsiloxane) (PSI100) and poly(3-carboxypropylmethylsiloxane-co-dimethylsiloxane) (PSIX, X = 76, 60, 41, 23 or 9, denoting the mole percentage of 3-carboxypropylmethylsiloxane unit in the copolymer) with poly(1-vinylimidazole) (PVI) was studied. PSI9 is miscible with PVI when the blend contains 80 wt% PVI. However, the other PSIX samples are miscible with PVI over the entire composition range. Most of the miscible PSIX/PVI blends show positive deviations in their glass transition temperature values. None of the miscible blends shows a lower critical solution temperature behavior prior to degradation. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy show that some of the imidazole nitrogens are protonated by the carboxylic acid groups, leading to ionic interactions. © 2001 Elsevier Science Ltd.|
|Appears in Collections:||Staff Publications|
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