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Thermal and mechanical properties of silane-crosslinked poly(vinylchloride)

✍ Scribed by M. Hidalgo; M. I. Beltrán; H. Reinecke; C. Mijangos

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
176 KB
Volume
70
Category
Article
ISSN
0021-8995

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✦ Synopsis

A comparative study has been made of the crosslinking of plasticized PVC by grafting of ␥-aminopropyltriethoxysilane (ASi) and sodium ␥-mercaptopropyltrimethoxysilane (NaMSi) during processing. The influence of type of reagent and concentration, and the rheological behavior were investigated to obtain a crosslinked material with improved mechanical properties and good thermal stability. Depending on the reagent concentration, different gel contents, ranging from 0 -100%, were obtained with both reagents. For all crosslinked systems the mechanical properties above T g were improved. In the case of ASi-crosslinked PVC, the thermal stability deteriorated significantly but, for NaMSi-crosslinked PVC, thermal stability remains close to that of raw PVC, and the separation of the grafting and crosslinking processes is more viable in this case.

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