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Synthesis, characterization, and hydrolysis of PVAc-PS-PVAc via charge transfer polymerization

โœ Scribed by Zaijun Lu; Xiaoyu Huang; Junlian Huang

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
178 KB
Volume
37
Category
Article
ISSN
0887-624X

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โœฆ Synopsis

An ABA triblock copolymer of polyvinyl acetate-b-polystyrene-b-polyvinyl acetate (PVAc-PS-PVAc) was successfully synthesized with a binary system composed of polystyrene with N,N-dimethylaniline end groups (PS da ) and benzophenone to initiate the polymerization of vinyl acetate under UV irradiation. The PS da was obtained by capping the living polystyrene macrodianion with p-(dimethylamino) benzaldehyde in excess. The PVA-PS-PVA could then be obtained by hydrolysis of PVAc-PS-PVAc in the sodium ethoxide benzene solution. The intermediates and desirable copolymers were characterized by GPC, IR, and 1 H-NMR in detail.

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