取代芳基磷酸酯钠盐成核剂的晶体结构与聚丙烯附生结晶的过程  

Single crystal structure of sodium phosphonate ester nucleating agents and their effects on polypropylene epitaxial crystallization

作　　者：张恰[1,2] 赵世成[1,2] 周帅[1,2] 石尧麒[1,2] 辛忠[1,2] Zhang Qia Zhao Shicheng Zhou Shuai Shi Yaoqi Xin Zhong(Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, Shanghai200237, China State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)

机构地区：[1]上海市多相结构材料化学工程重点实验室,上海200237 [2]华东理工大学化学工程联合国家重点实验室化工学院产品工程系,上海200237

出　　处：《石油化工》2017年第1期36-43,共8页Petrochemical Technology

基　　金：国家高技术研究发展计划项目(2015AA034003);国家自然科学基金项目(21476085)

摘　　要：分别以甲醇和N,N-二甲基甲酰胺(DMF)为溶剂,用溶剂挥发法制备两种不同晶体结构的2,2’-亚甲基双(4,6-二叔丁基苯基)磷酸钠(NA40)成核剂单晶。用单晶XRD法确定晶体的晶胞参数,并与等规聚丙烯(iPP)的晶胞参数比较,研究NA40与iPP的附生结晶关系。表征结果显示,NA40-MeOH和NA40-DMF均能与iPP发生附生结晶,有较好的成核性能,c轴长分别为1.1950nm和1.2619nm,约为iPP晶体c轴(0.650nm)的2倍,失配率分别为8.79%和3.78%,小于附生结晶能发生的10%~15%失配率上限。两种成核剂对iPP性能的改善作用相近,成核剂用量为0.1%(w)时,较空白iPP的弯曲模量提高约20%,拉伸强度提高10%,球晶尺寸均减小。Single crystal sodium 2,2’-methylene-bis-（4,6-di-t-butylphenylene） phosphonates with two separate crystal structures were prepared through solvent evaporation with methanol and dimethyl formamide（DMF） as solvents,and were characterized by means of single crystal XRD. The results showed that epitaxial crystallization could perform between the lattices of isotactic polypropylene（i PP） and the lattices of NA40-MeOH or NA40-DMF,which indicated that both NA40-MeOH and NA40-DMF had good nucleating ability for i PP. The lengths of the c axes of NA40-MeOH and NA40-DMF were 1.195 0 nm and 1.261 9 nm respectively,two times of the length of the i PP c axis（0.650 nm）,and the disregistries were 8.79% and 3.78%,respectively,which were less than the upper limit of the epitaxial crystallization（10%-15%）. The effects of the two nucleating agents on improving the properties of i PP were similar. When the content of the nucleating agents was 0.1%（w）,the flexural modulus and tensile strength of i PP increased by about 20% and 10%,and the particle size of the spherocrystal decreased.

关 键 词：磷酸酯钠盐 聚丙烯 成核剂 附生结晶 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]