MORPHOLOGY OF HIGH IMPACT POLYPROPYLENE
Higher impact polypropylene (hiPP) usually produced by a multistage polymerization process is a kind of complicated multicomponent blending system, consisting of polypropylene (iPP) matrix, ethylenepropylene random copolymer (EPR), ethylene-propylene multiblock copolymers and a small amount of polyethylene (PE) homopolymer. The excellent mechanical properties of hiPP are closely related to the multiphase structure of the material. The finely dispersed EPR phase is the key factor that makes the material have both the high rigidity and the high toughness. It is generally believed that the dispersed phase exhibits a core-shell structure with PE core and EPR shell. This core-shell structure has been proven to be efficient for the toughnessrigidity balance of hiPP. Although the production of hiPP is a commercial success, the understanding of the morphological structure of the material is far from perfect. In this work, the multiphase morphologies and material composition of hiPP were investigated by transmission electron microscopy (TEM), electron diffraction (ED), scanning electron microscopy (SEM), atomic force microscopy (AFM), 13CNMR and differential scanning calorimetry (DSC) in conjunction with solvent extraction fractionation.
Yong Chen Ye Chen Cuiyan Tong Decai Yang
State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,P.R.China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
13-14
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）