CaCO_3纳米晶须对PBT/PE/LCI杂化材料性能的影响  

Effect of CaCO_3 Nanowhiskers on Behavior of Hybridized PBT/PE/LCI Blends

作　　者：曲文忠[1] 徐新宇[1] 李明超[1] 张宝砚[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2010年第7期1003-1006,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50673105);国家高技术研究发展计划项目(2006AA02Z291);国防科工委项目(DBDX2008038)

摘　　要：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.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 % LGI 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.

关 键 词：PBT PE 液晶离聚物 CaCO3纳米晶须 增容 增强 

分 类 号：O631.1[理学—高分子化学]