Preparation of crystalline and solvent resistant polycarbonates via ring‐opening polymerization of cyclic oligomers | Zendy

Brunelle Daniel J. | Zendy; Krabbenhoft Herman O. | Zendy; Bonauto David K. | Zendy

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Preparation of crystalline and solvent resistant polycarbonates via ring‐opening polymerization of cyclic oligomers

Author(s) -

Brunelle Daniel J.,

Krabbenhoft Herman O.,

Bonauto David K.

Publication year - 1994

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.19940770115

Subject(s) - hydroquinone , polymer chemistry , solvent , tetrahydrofuran , polymerization , bisphenol , copolymer , polymer , melting point , glass transition , bisphenol a , hydrolysis , materials science , chemistry , organic chemistry , epoxy

A route to solvent‐resistant polycarbonates which may also be crystalline has been achieved through the intermediacy of cyclic oligomeric carbonates. Mixed oligomeric cyclics of a variety of bisphenols were prepared via the carefully controlled hydrolysis‐condensation of their bischloroformates. Following ring‐opening polymerization, the polymers were evaluated for potential solvent resistance. Copolymers of hydroquinone and bisphenol A containing ratios of hydroquinone to BPA between 50/50 and 70/30 were found to be insoluble in CH 2 Cl 2 , tetrahydrofuran, and CHCl 3 , as well as other organic solvents. Polymers containing ratios of hydroquinone/BPA greater than 60/40 show a crystalline melting point by DSC at about 310°C and a glass transition temperature at 154°C.

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