摘要
以全同立构聚丙烯（iPP）和癸二酰二苯甲酰肼（TMC-300）为原料,通过熔融共混技术制备了iPP/TMC-300复合材料,采用DSC、XRD、SEM、POM和力学测试仪器考察了成核剂TMC-300对iPP结晶和熔融行为、晶体结构以及力学性能等的影响。结果表明：TMC-300对iPP有显著的成核效果,当TMC-300的质量分数为0.6%时,iPP的结晶温度由纯iPP的117.2℃提高到126.9℃,其成核效率可达到56.3%;在130℃下等温结晶,纯iPP的半结晶时间（t1/2）为4.85 min,当TMC-300的质量分数为0.2%时,t1/2变为0.52 min,减小了89%。同时,TMC-300的添加并没有改变iPP的晶体结构,而且添加TMC-300的iPP的冲击断裂表面相对纯iPP呈现出了明显的多褶皱韧性断裂形貌特征,TMC-300的质量分数为0.2%时,复合材料的断裂伸长率由纯iPP的674.8%提高到了833.2%,缺口冲击强度由32.5 J/m提高到了43.2 J/m。将TMC-300与成核剂TMC-328、HPN-68L对iPP的结晶与力学性能影响进行了对比,TMC-300的质量分数为0.2%时的结晶峰温度为126.2℃,较TMC-328的质量分数为0.2%时的125.2℃略高,其缺口冲击强度（43.2 J/m）较HPN-68L的质量分数为0.2%时的（37.3 J/m）提高了15.8%。
Isotactic polypropylene（iPP） and N, N＇-bis（benzoyl） sebacic acid dihydrazide（TMC-300） composite materials were prepared by means of melt blending method. The effects of nucleating agent TMC-300 on the crystallization and melting behaviors, crystal structure and mechanical properties of iPP were studies by DSC, XRD, SEM, POM and mechanical test. The results showed that the addition of TMC-300 had a significant nucleation effect on iPP. The composite material containing 0.6% TMC-300（mass fraction） exhibited a crystallization temperature of 126.9 ℃, higher than pure iPP（117.2 ℃）, and the nucleation efficiency reached 56.3%. When the sample was isothermally crystallized at 130 ℃, half-time of crystallization（t1/2） of pure iPP was 4.85 min, however, that of the composite material containing 0.2% TMC-300 was only 0.52 min, which was a decrease of 89%. Moreover, the introduction of TMC-300 did not change the crystal structure of iPP, on the contrary, made the impact fracture surface of iPP show obvious characteristics of multi fold ductile fracture. When the content of TMC-300 was 0.2%, the elongation at break of the composite material was 833.2% and the notched impact strength was 43.2 J/m, which was higher than the corresponding value of pure iPP（674.8% and 32.5 J/m）. Finally, the effects ofTMC-300 on the crystallization and mechanical properties of iPP were compared with that of nucleating agent TMC-328 and HPN-68 L. The crystallization temperature of the composite material containing 0.2% TMC-300 was 126.2 ℃, which was slightly higher than that of the composite material containing 0.2% TMC-328（125.2 ℃）. And the notched impact strength of the composite material containing 0.2% TMC-300 was 43.2 J/m, which was an improvement of 15.8% compared with that of the composite material containing 0.2% HPN-68 L（37.3 J/m）
作者
王迪然
罗发亮
纪利杰
王克智
WANG Di-ran;LUO Fa-liang;JI Li-jie;WANG Ke-zhi(State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia Hui Autonomous Region, China;Shanxi Provincial Institute of Chemical Industry, Taiyuan 030021, Shanxi, China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2018年第7期1087-1096,共10页
Fine Chemicals
基金
宁夏“化学工程与技术”国内一流学科建设项目(宁教高[2017]121号)
省部共建煤炭高效利用与绿色化工国家重点实验室建设资金(宁国科发基[2017]7号)
国家自然科学基金(51063004)~~
关键词
等规聚丙烯(iPP)
成核剂
结晶
力学性能
功能材料
isotactic polypropylene （iPP）
nucleating agent
crystallization
mechanical properties
functional materials
作者简介
王迪然（1992-），男，硕士生。;联系人：罗发亮（1976-），男，教授，E-mail：flluo@iccas．ac．cn。
