2004•China Plastics IndustryRequires access

Study on Toughening Mechanism of Co-crosslinked PP/LLDPE/SBS Blends

HE Ji-hui

Abstract

PP/LLDPE/SBS crosslinked blend was prepared by means of two-step crosslinking process.The morphology and structure of the blend before and after crossling were analyzed by means of SEM and TEM.The results indicated that SBS was introduced into the molecular chains of PE,formed a SBS-PE inclusion structure,being a form of (inclusion + penetration) structure after crosslinking processing,which reinforced the interfacial action between PP and PE phases.When outer force was acted on the blend,there formed a penetration structure in the fracture surface of the blend,and no phase separation appeared,which showed the interfacial adhesion of each composition of the blend was increased by crosslinking.

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Key concepts: Materials science, Toughening, Penetration (warfare), Composite material, Linear low-density polyethylene, Morphology (biology), Polymer blend, Adhesion