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Journal of Materials Science

, Volume 43, Issue 15, pp 5083–5091 | Cite as

Interfacial crystalline behavior in glass-fiber/polypropylene composites modified by block copolymer coupling agents

  • Yin Li
  • Lingxia Chen
  • Xiaodong ZhouEmail author
Interface Science

Abstract

A kind of di-block copolymer polystyrene-block-poly(γ-methacryloxy-propyltrimethoxysilane) (PS-b-PMPS) with different PS block length and a kind of tri-block copolymer polystyrene-block-poly(n-butylacrylate)-block-poly(γ-methacryloxypropyltrimethoxysilane) (PS-b-PnBA-b-PMPS) with different PnBA block length were synthesized by atom transfer radical polymerization (ATRP), in which PS was a ‘hard’ block and PnBA was a ‘soft’ block. The interfacial crystallization behaviors of glass fiber/polypropylene systems modified with different coupling agents MPS, PS-b-PMPS, and PS-b-PnBA-b-PMPS were investigated on different crystallization conditions. Transcrystallinity could not be induced on non-isothermal crystallization or without maleic anhydride (10%) in polypropylene, but it appeared when glass fibers were treated with common silane coupling agent γ-methacryloxypropyltrimethoxysilane (MPS) and di-block copolymer coupling agent PS-b-PMPS in 135 °C isothermal crystallization without shear and 150 °C isothermal crystallization with shear. However, it disappeared at the interface when the samples were treated with tri-block copolymer coupling agent (PS-b-PnBA-b-PMPS) either under static or shear-induced condition. It might be that the flexible interlayer formed by the flexible block PnBA of PS-b-PnBA-b-PMPS could relax not only the thermal stress resulted from interface temperature gradient arising from sample cooling for crystallization, but also the shear stress induced by fiber/matrix interface shear.

Keywords

Glass Fiber Atom Transfer Radical Polymerization Atom Transfer Radical Polymerization Maleic Anhydride Isothermal Crystallization 

Notes

Acknowledgment

The authors sincerely acknowledge the support of NSFC (50003003).

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghaiP.R. China

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