Vinyl-terminated oligomeric ethers: A study of the crosslinking process

✍ Scribed by S. J. Barton; J. S. Ghotra; A. E. Matthews; G. Pritchard

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 585 KB
• Volume: 42
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1991.070420105

✦ Synopsis

KT1 2EE, UK

SYNOPSIS

A thermosetting resin consisting of a mixture of vinyl-terminated oligomeric ethers was prepared by a two-step synthesis. This required the reaction of 1,4-bis (chloromethyl) benzene with the potassium salt of bisphenol A, and subsequent vinylation of the chloromethyl end groups by means of a Wittig reaction. The linear vinyl prepolymers were thermally crosslinked through their reactive styryl end groups (without the addition of catalyst) to produce castings and woven glass laminates. A study of the crosslinking process was carried out by differential scanning calorimetry (DSC) . The water absorption and the thermooxidative stability of the crosslinked polymer were investigated. A styrene solution of the oligomeric ethers was also crosslinked, using benzoyl peroxide as a catalyst. The moisture absorption characteristics of the crosslinked styrene copolymer were compared with those of the crosslinked homopolymer. Both substances showed hydrophobic character.