Studies of moisture induced crosslinking in a novel vinyl ether-maleic anhydride copolymer

被引:0
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作者
B. Rema
S. Ramakrishnan
机构
[1] Indian Institute of Science,Department of Inorganic and Physical Chemistry
来源
Polymer Bulletin | 1997年 / 38卷
关键词
Anhydride; Acetic Anhydride; Vinyl Ether; Maleic Anhydride; Dioxolane;
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学科分类号
摘要
A novel vinyl ether, 2,2-dimethyl-4-vinyloxymethyl-l,3-dioxolane (DMVMD), that has a dimethyl ketal protected vicinal diol functionality, was synthesizied from readily available starting materials, such as glycerol, acetone and acetylene. Copolymerisation of DMVMD with maleic anhydride (MAH) in various molar ratios was carried out using a free radical initiator. The composition of the copolymer was established by conductometric titration, and was found to be 1:1 irrespective of the monomer feed composition thus establishing its alternating nature. The copolymer formed clear free standing films upon solvent casting which became insoluble upon prolonged exposure to ambeint atmosphere. The insolubility is ascribed to moisture induced crosslinking. A plausible mechanism for the crosslinking involves the hydrolysis of some of the anhydride groups, followed by acid catalysed deketalization, and then by the reaction of the alcoholic groups, thus generated, with the residual anhydride to give ester crosslinks. This hypothesis was confirmed both by model reactions and insitu FT-IR studies.
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页码:537 / 543
页数:6
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