CaCO3纳米晶须对PBT/PE/LCI杂化材料性能的影响

合成了一种CaCO3纳米晶须和主链含磺酸基的液晶离聚物(LCI),采用熔融共混法制备了PBT/PE/LCI/CaCO3纳米晶须杂化材料.通过DSC,红外图像系统和拉伸试验对共混体系的热行为、形态结构和力学性能进行了研究.结果表明:在共混体系中加入质量分数为3%LCI时,提高了PBT的结晶温度和结晶度,并且分散相均匀地分散在PBT基体中,证实LCI发挥增容剂的作用;当LCI质量分数为3%和CaCO3纳米晶须质量分数为5%时,杂化材料的力学性能达到了最大值,证实了LCI同时起到了增容和增强作用.

Effect of CaCO3 Nanowhiskers on Behavior of Hybridized PBT/PE/LCI Blends

CaCO3 nanowhiskers and a liquid crystalline ionomer (LCI) were synthesized separated in lab, then the CaCO3 nanowhiskers and LCI were blended with PBT and PE to prepare the hybridized PBT/PE/LCI/CaCO3 nanowhiskers blends. The thermal behavior, morphology structure and mechanical properties of the blends were investigated by differential scanning calorimetry (DSC), FT-IR spectra, and tensile tester. The results showed that the crystallizing temperature and crystallinity of PBT are both increased by adding 3% LCI in the blends, and the LCI disperses homogeneously in the PBT matrix, thus verifying that LCI serves the function of compatibilizer. The mechanical properties of the hybridized blend come up to the maximum values if the contents of LCI and CaCO3 are 3% and 5%, respectively, thus verifying that LCI serves the functions of compatibilization and reinforcement simultaneously.