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Study of the effect of fumed silica on rigid PVC properties
Author(s) -
Fellahi Said,
Boukobbal Saadi,
Boudjenana Farid
Publication year - 1993
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730150106
Subject(s) - vicat softening point , fumed silica , materials science , composite material , thermal expansion , polyethylene , linear low density polyethylene , ultimate tensile strength , softening point
This study seeks to substitute fumed silica for chlorinated polyethylene (CPE) within a rigid PVC formulation intended for profile extrusion such as doors and window frames. The effect of fumed silica on both mechanical (tensile and impact) and thermal (Vicat point, HDT, and linear thermal expansion coefficient) properties were investigated. Five rigid PVC formulations were prepared, including a reference one (F 1 ), then F 1 with CPE, F 1 with untreated silica, F 1 with heat treated silica, and finally F 1 with dried silica and a coupling agent. The effect of CPE on mechanical properties was very modest. On the other hand, CPE showed its inefficiency, in that HDT and Vicat point were decreased. Heat treated silica showed the greatest improvement in both mechanical and thermal properties. Untreated silica showed a small effect on both properties. Finally, the incorporation of coupling agent gave considerable improvement in both mechanical and thermal properties.