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Title: Effects of interfacial adhesion on the rubber toughening of poly(vinyl chloride) Part 1. Impact tests
Authors: Liu, Z
Zhu, X
Wu, L
Li, Y
Qi, Z
Choy, CL 
Wang, F
Keywords: Brittle-ductile transition
Interfacial adhesion
Rubber toughened poly(vinyl chloride)
Issue Date: 2001
Publisher: Elsevier
Source: Polymer, 2001, v. 42, no. 2, p. 737-746 How to cite?
Journal: Polymer (United Kingdom) 
Abstract: The influence of interfacial adhesion on the impact toughness of poly(vinyl chloride) (PVC)-nitrile rubber (NBR) blends with the morphology of well-dispersed rubber particles has been investigated. The blend containing NBR 18 (NBR with 18 wt% acrylonitrile (AN)) has medium interfacial adhesion strength, and exhibits a brittle-ductile transition at a critical matrix ligament thickness Tc = 0.059 μm while the blend containing NBR 26 (NBR with 26 wt% AN) and having stronger interfacial adhesion exhibits the transition at Tc = 0.041 μm. The difference can be understood in terms of the deformation mechanisms. Debonding at the interface of the PVC-NBR 18 blend takes place upon impact, and this induces shear yielding of the matrix. For the PVC-NBR 26 blend, however, no microvoid is formed, so the occurrence of matrix shear yielding is delayed. In the investigated rubber particle size range (0.04 - 0.12 μm), debonding followed by matrix shear yielding is a much more important toughening mechanism than internal cavitation of rubber particles.
ISSN: 0032-3861
EISSN: 1873-2291
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