高等学校化学学报2018，Vol.39Issue(5)：1091-1097,7.DOI:10.7503/cjcu20170664
SSBR/TPI共混体系中TPI的结晶、成核及动力学研究
Crystallization, Nucleation and Kinetics of TPI in SSBR/TPI Blends
摘要
Abstract
Crystallization behavior including polymorphic behavior, nucleation density, crystal growth rate, kinetics of isothermal and non-isothermal crystallization in the immiscible solution polymerized styrene-butadiene rubber(SSBR)/trans-1,4-polyisoprene(TPI)blends were investigated by polarized optical microscopy(POM), wide angel X-ray diffraction(WAXD)and differential scanning calorimeter(DSC). The results show that less than 40%(mass fraction)of SSBR admixing with TPI brings about the suppressed nucle-ation and crystal growth rate of TPI. The overall crystallinity declines with the addition and increase of amorphous SSBR content, the normalized crystallinity of TPI, however, increases due to the decreased crystallization rate, resulted from the dilution of SSBR components, in turns the reduced equilibrium melting points and the lower undercooling. Additionally, the amorphous component SSBR depresses the formation of α-TPI crystal while enables the formation of β-TPI crystal. Both the reduced crystallization rate of TPI during the isothermal crystallization and the lower crystallization temperature of TPI during non-isothermal crystallization were observed with the increase of SSBR content. All these results are in line with the crystallization behavior of the miscible amorphous/crystalline polymer blends because of the neglectable phase separation arising from the high viscosity of both rubber components leading to the slow dynamic of molecules. However,as the content of SSBR reached a high level, the nucleation density of the system increased with SSBR content increasing due to the phase separation exerting its influence on TPI crystallization.关键词
溶聚丁苯橡胶/反式-1,4-聚异戊二烯(SSBR/TPI)共混体系/结晶行为/结晶动力学Key words
Styrene-butadiene rubber/trans-1/4-polyisoprene(SSBR/TPI)blend/Crystallization behavior/Crystallization kinetics分类
化学化工引用本文复制引用
任惠成,武营飞,刘丹丹,聂华荣,贺爱华..SSBR/TPI共混体系中TPI的结晶、成核及动力学研究[J].高等学校化学学报,2018,39(5):1091-1097,7.基金项目
国家重点基础研究发展计划项目[批准号:2015CB654700(2015CB354706)]、国家自然科学基金(批准号:51473083, 51773105)、山东省重大基础研究项目(批准号:ZR2017ZA0304)、山东省自然科学基金(批准号:ZR2016EMM05)、泰山学者工程和黄河三角洲学者工程专项经费资助. Supported by the National Basic Research Development Program of China[No.2015CB654700(2015CB354706)],the National Natural Sci-ence Foundation of China(Nos.51473083,51773105), the Major Basic Research Program of Shandong Province, China(No.ZR2017ZA0304), the Natural Science Foundation of Shandong Province,China(No.ZR2016EMM05)and the Special Foundation of Taishan Mountain Scholar Con-structive Program and the Yellow River Delta Scholar Program,China. （2015CB354706）
