Evidence of irradiation‐induced crosslinking in miscible blends of poly(vinyl chloride)/epoxidized natural rubber in presence of trimethylolpropane triacrylate

Wiley - Tập 81 Số 8 - Trang 1914-1925 - 2001
Chantara Thevy Ratnam1, Mohammed Nasir2, A. Baharin2, Khairul Zaman1
1Radiation Processing Technology Division, Malaysian Institute for Nuclear Technology Research (MINT), Bangi, 43000 Kajang, Malaysia
2School of Industrial Technology, University of Science Malaysia, 11800 Penang, Malaysia

Tóm tắt

Abstract

Electron‐beam initiated crosslinking of a poly(vinyl chloride)/epoxidized natural rubber blend (PVC/ENR), which contained trimethylolpropane triacrylate (TMPTA), was carried out over a range of irradiation doses (20–200 kGy) and concentrations of TMPTA (1–5 phr). The gelation dose was determined by a method proposed by Charlesby. It was evident from the gelation dose, resilience, hysteresis, glass‐transition temperature (Tg), IR spectroscopy, and scanning electron microscopy studies that the miscible PVC/ENR blend underwent crosslinking by electron‐beam irradiation. The acceleration of crosslinking by the TMPTA was further confirmed in this study. Agreement of the results with a theory relating the Tg with the distance between crosslinks provided further evidence of irradiation‐induced crosslinking. The possible mechanism of crosslinking induced by the irradiation between PVC and ENR is also proposed. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1914–1925, 2001

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Wiley

Tập 81 Số 8

1914-1925

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