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Crosslinking of rigid poly(vinyl chloride) with epoxysilane
Author(s) -
Li Lanjun,
Chen Xian,
He Bobing
Publication year - 2007
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.20110
Subject(s) - vinyl chloride , materials science , vicat softening point , calcium stearate , grafting , polymer chemistry , fourier transform infrared spectroscopy , polyvinyl chloride , sodium bisulfite , stearate , vulcanization , nuclear chemistry , chemical engineering , softening point , composite material , chemistry , organic chemistry , copolymer , natural rubber , polymer , raw material , engineering
Crosslinking is an effective way to improve the properties of poly(vinyl chloride). A crosslinking agent consisting of R ‐glycidoxypropyltrimethoxysilane (KH560) has been used for the first time in order to introduce crosslinking into rigid poly(vinyl chloride). Different thermal stabilizers (organotin, Ca/Zn stearate, and Ba/Zn stearate) as well as sodium bisulfite were tried in order to promote grafting of the epoxy group and enhance the degree of crosslinking. Fourier transform infrared (FTIR) spectra showed that grafting and crosslinking of KH560 with poly(vinyl chloride) could take place, and that a gel content of 40% could be obtained when more than 10 phr of epoxysilane was used with a 2:1 (weight) ratio of BaSt 2 /ZnSt 2 and a 1:1 molar ratio of NaHSO 3 /KH560, while premature crosslinking was avoided. The Vicat softening temperature of crosslinked PVC could be increased by about 10°C when 5 phr of epoxysilane was added, and thermal degradation could be delayed with increasing gel content. Therefore, epoxysilane‐crosslinked PVC has the potential for extensive applications. J. VINYL ADDIT. TECHNOL., 13:103–109, 2007. © 2007 Society of Plastics Engineers.