文献类型：期刊文献

英文题名：Isothermal crystallization behaviors of isotactic polypropylene nucleated with α/β compounding nucleating agents

作者：Zhang, Yue-Fei[1]; Xin, Zhong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Lab Organ Funct Mat, Shanghai 200237, Peoples R China

年份：2007

卷号：45

期号：5

起止页码：590

外文期刊名：JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS

收录：;EI(收录号：20071110485665);WOS:【SCI-EXPANDED(收录号:WOS:000244267600008)】；

语种：英文

外文关键词：crystallization; isotactic polypropylene; isothermal crystallization; nucleation; poly(propylene) (PP); alpha/beta compounding nucleating agents

摘要：Sodium 2,2'-methylene-bis(4,6-di-tert-butylphenyl) phosphate (NA40) and N,N-dicyclohexylterephthalamide (NABW) are high effective nucleating agents for inducing the formation of a-isotactic polypropylene (alpha-iPP) and beta-iPP, respectively. The isothermal crystallization kinetics of iPP nucleated with nucleating agents NABW, NA40/NABW (weight ratio of NA40 to NABW is 1:1) and NA40 were investigated by differential scanning calorimetry (DSC) and Avrami equation was adopted to analyze the experimental data. The results show that the addition of NABW, NA40/NABW and NA40 can shorten crystallization half-time (t(1/2)) and increase crystallization rate of iPP greatly. In these three nucleating agents, the alpha nucleating agent NA40 can shorten t(1/2) of iPP by the largest extent, which indicates that it has the best nucleation effect. While iPP nucleated with NA40/NABW compounding nucleating agents has shorter t1/2 than iPP nucleated with NABW The Avrami exponents of iPP and nucleated iPP are close to 3.0, which indicates that the addition of nucleating agents doesn't change the crystallization growth patterns of iPP under isothermal conditions and the crystal growth is heterogeneous three-dimensional spherulitic growth. (c) 2007 Wiley Periodicals, Inc. J Polym. Sci Part B: Polym. Phys 45: 590-596, 2007.