TMC-328与TMP-6复配调控聚乳酸结晶与性能  

Influence of TMC-328/TMP-6 on the Crystallization Regulation and Properties of PLLA

作　　者：武学坚 罗发亮[1] 齐亚平 王克智 邢倩[3] 

机构地区：[1]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021 [2]山西化工研究所,山西太原030021 [3]北京工商大学材料与机械工程学院,北京1000482

出　　处：《塑料工业》2017年第9期47-52,62,共7页China Plastics Industry

基　　金：国家自然科学基金资助项目(21264012)

摘　　要：为了克服聚乳酸成核能力差。专用单一成核剂(TMC-328)改性价格昂贵且效果有限的不足,采用TMC-328/TMP-6来协同调控聚L-乳酸(PLLA)的结晶与性能,利用差示扫描量热仪(DSC)、X射线粉末衍射仪(WAXD)、偏光显微镜(POM)和力学性能测试手段系统研究了复合成核剂对PLLA结晶行为、晶体形态和力学性能方面的影响。结果表明,复合成核剂TMC-328/TMP-6显著提高了聚乳酸的结晶温度和结晶速率,成核效果优于传统的单一TMC-328成核剂,且不影响PLLA的结构和晶型。另外,适量的复合成核剂可以提高PLLA的韧性,在TMC-328含量为0.6%,TMP-6的含量为0.4%时,PLLA/TMC-328/TMP-6共混材料的缺口冲击强度达到了最大值4.33 kJ/m^2,较PLLA/TMC-328共混物和纯PLLA分别约提高了10.9%和1.3倍。In order to overcome the shortcomings including the poor nucleation ability of poly （L-laCtic acid） （PLLA）, high cost of specific single nucleating agent （TMC-328） and low nucleation efficiency, the composite nucleating agent TMC-328/TMP-6 was added into PLLA. The effects on the crystallization behaviors and toughness of PLLA were systematically investigated by differential scanning calorimetry （ DSC）, wide angle X-ray diffraction （WAXD）, polarized optical microscopy （POM） and mechanical properties tests. The results show that TMC-328/TMP-6 enhances significantly the crystallization peak temperature and crystallization rate of PLLA from the melt state, and exhibits better nucleation effect than conventional nucleating agent TMC-328. Moreover, TMC-328/TMP-6 could synergistically improve the toughness of PLLA. The highest impact strength occurred when the contents of TMC-328 and TMP-6 were 0.6% and 0. 4%, respectively, with the value of 4.33 kJ/m2 increased by 10. 7% and 1.3 times than that of PLLA/ TMC-328 blends and pure PLLA, respectively.

关 键 词：聚乳酸 结晶 TMC-328 TMP-6 韧性 

分 类 号：O633.14[理学—高分子化学]