Structure and Properties of Isotactic Polypropylene/Polybutene-1 In-reactor Alloys  

作　　者：Ya-Ping Ma Ning Zhang Wei-Ping Zheng Ai-Hua He Chen-Guang Liu 

机构地区：[1]Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization,Key Laboratory of Rubber Plastis(Ministry of Education),School of Polymer Science and Engineering,Qingdao University ofScience and Technology Qingdao 266042,China

出　　处：《Chinese Journal of Polymer Science》2020年第12期1382-1391,共10页高分子科学（英文版）

基　　金：supported by the Major Scientific and Technological Innovation Project of Shandong Province(No.2019JZZY010352);Natural Science Foundation of Shandong Province(No.ZR2019MB072)and Taishan Scholar Program.

摘　　要：The composition and structure of polymer largely determine the properties of its final products.As a novel polymer material,the composition,structure,and properties of the isotactic polypropylene/polybutene-1 in-reactor alloy(PPIPB alloy)synthesized by sequential two-stage polymerization with Ziegler-Natta catalyst were correlated for the first time in this work.The iPP/PB alloy was fractionated by temperature rising elution fractionation(TREF)in a broad temperature ranged from-30℃ to 140℃,and the chain microstructures and sequence distributions of isolated fractions were analyzed by DSC,GPC,13C-NMR,and FTIR.The iPP/IPB alloy was composed of five components,namely high isotactic PB(PB,85.8 wt96),medium isotactic PB(mPB,5.1 wt%),polyl(butene-1)-block propylene copolymers(PB-6 PP,4.1 wt%6)which contained PB and PP blocks with dfferent lengths according to the isolation temperature,isotactic PP(iPP,2.7 wt%6),and atactic PB(aPB,2.3 wt96).Compared to other commercial pipe materials,the P/iPB alloy presented outstanding thermal creep resistance and gas permeability resistance,high strength and low deformation at high temperature,and appropriate flexural strength.The roles of PP and PB-b-PP components in the alloy were interpreted.This work is expected to elucidate the potential application of PPIPB aloy as pipe materials and provide solutions for the design and synthesis of high performance pipe materials.

关 键 词：POLYBUTENE-1 Aloy Block copolymer Structure PROPERTY 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]