writer：Defeng Wu,Lanfeng Wu,Jianghong Wang,Yurong Sun,Ming Zhang
keywords：poly(phenylene sulfide); epoxy resin; viscoelastic properties; thermal behaviours.
source：期刊
specific source：Materials Chemistry & Physics, 2011, 128, 274-282
Issue time：2011年

Materials Chemistry & Physics, 2011, 128, 274-282

ABSTRACT:

In this work, thermal behaviours and viscoelasticity of the PPS/epoxy resin mixtures prepared by melt mixing were studied, and the rheology was used as a tool to further explore the relations between chain structures and properties of the mixtures. The results show that the epoxy resin can promotes degradation and branching of the PPS during melt mixing due to its poor thermal stability. The formation of long chain branched and partly crosslinked structures in the mixtures together with the residual decomposed components hence result in increase of molecular weight and broadening of molecular weight distribution in comparison with those of the neat PPS. As a result, the mixtures show the viscoelastic behaviours far different from the neat PPS: the presence of crosslinked structure leads to the strong solid-like responses in the small amplitude oscillatory shear (SAOS) flow, and the presence of long chain branched structure to the weak strain overshoots in the large amplitude oscillatory shear (LAOS) flow. Moreover, after quiescent annealing, a strain-scaling transient stress behavior is observed on the mixtures in the reverse flow.

PDF DOWNLOAD:

http://www.sciencedirect.com/science/article/pii/S0254058411001921