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Preparation of crosslinked and thermostable paste poly(vinyl chloride)

✍ Scribed by Jørn Sundbø; Bård Sæthre; Steinar Pedersen

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
158 KB
Volume
67
Category
Article
ISSN
0021-8995

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✦ Synopsis

The grafting of a mercaptoalkyltrialkoxysilane onto an activated poly(vinyl chloride) (PVC) paste resin with subsequent hydrolytic crosslinking has been studied. The resins were prepared by copolymerization of vinyl chloride monomer and glycidylmethacrylate (GMA). The grafting of a mercaptosilane was carried out during gelation of the plastisol. In this step the formation of a chemical network was avoided. By steaming at 120ЊC for 30 min the grafted samples crosslinked. The gel yield increased with increasing fraction of GMA and up to a given level with the fraction of the mercaptosilane. When using a resin of PVC homopolymer no crosslinking occurred. The silane grafted and crosslinked samples were found to have satisfactory thermal stability.

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