Réactive and polymer blending process : controlled synthesis of polystyrene and polyamide graft copolymers and compatibilizing efficiency of these copolymers

Abstract : Polymer blending offers an important route to new materials with combinations of properties not available in constituent polymers. Most polymer pairs are immiscible, leading to phase separation at equilibrium and yield a material with poor properties. To address this challenge, block or graft copolymers pre-made or generated in-situ by reactive blending are often used as compatibilizers. Most studies are focused on the compatibilizing efficiency of block copolymers and few studies address that of graft copolymers, partly because of difficulties of controlling their molecular structures.This thesis is devoted to the study of the emulsification efficiency of graft copolymers. It is composed of three parts: (1) development of a novel reactive extrusion process for synthesizing graft copolymers with polystyrene (PS) as backbone and polyamide 6 (PA6) as grafts; (2) emulsification efficiency of PS-g-PA6 graft copolymers for PS/PA6 blends; and (3) concept of emulsifier- tracer
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Cai-Liang Zhang. Réactive and polymer blending process : controlled synthesis of polystyrene and polyamide graft copolymers and compatibilizing efficiency of these copolymers. Other. Institut National Polytechnique de Lorraine, 2008. English. ⟨NNT : 2008INPL067N⟩. ⟨tel-01753063⟩

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