writer：KunchengYao，HuarongNie，Yongri Liang*, Dong Qiu*, Aihua He*
keywords：Trans-1,4-Polyisoprene, blend, crystallization
source：期刊
specific source：Polymer, 2015, 80 (20), 259-264
Issue time：2015年
Polymorphic crystallization behaviors in amorphous/crystalline polymer blends of cis-1,4-polyisoprene/trans-1,4-polyisoprene (CPI/TPI) have been not fully understood so far. In this work, we investigated the effects of CPI content and crystallization temperature on crystal nucleation, spherulite growth rate and crystallinity of a- and b-TPI crystals with X-ray diffraction (XRD) and polarized optical microscopy (POM) methods. The results showed that the incorporation of amorphous CPI caused a more severer suppression effect on the formation of a-TPI crystal than that on the formation of b-TPI crystal. A high crystallization temperature was beneficial to the formation of a-TPI, and a low temperature promoted the
formation of b-TPI in CPI/TPI blends. These facts were rationalized by the different response of a-TPI and b-TPI crystals on the changed thermodynamic and kinetics of crystallization owing from the interaction between both isomers of CPI and TPI.