Lin Fuhua, Zhang Mi, Mao Shuangdan, Zhang Jianjun, Wang Kezhi, Luo Jun, Chen Xinde, Wang Bo, Wei Yinghui
School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China.
Shanxi Provincial Institute of Chemical Industry (Co., Ltd.), Jinzhong 030600, China.
Polymers (Basel). 2022 Sep 2;14(17):3637. doi: 10.3390/polym14173637.
In this work, a kind of aryl phosphate salt nucleating agent (APAl-12C) was synthesized, which was replaced in the hydroxyl group on the aluminum hydroxy bis [2,2'-methylene-bis(4,6-di-tert-butylphenyl) phosphate] (APAl-OH) by lauroyloxy, which could improve the dispersion between the nucleating agent and the iPP matrix and reduce the migration potential of the nucleating agent in the iPP matrix by increasing the molecular weight. The structure of the nucleating agent APAl-12C was analyzed by fourier infrared spectroscopy (FT-IR ) and H NMR. The differential scanning calorimeter (DSC) results indicated that the addition of APAl-OH or APAl-12C alone was inferior to the commercial nucleating agent NA-21 (compounds of APAl-OH and Lithium laurate) in terms of the crystallization behavior, which may be due to the importance of metal Li in the crystallization property. Thus, the iPP/A12C-Li composites were prepared with APAl-12C, lithium laurate (lilaurate) and the iPP matrix. The crystallization behavior, morphology, optical and mechanical properties for the iPP/A12C-Li composites were systematically studied and compared with that of the iPP/NA-21 composite. Among the iPP/A12C-Li composites with the addition of 0.5 wt%, APAl-12C/Lilaurate had the fastest crystallization rate and reduced the haze value of the neat iPP from 36.03% to 9.89% without changing the clarity, which was better than that of the iPP/NA-21 composite. This was due to the weakening of the polarity of the APAl-12C after lauroyloxy substitution and better dispersion in the iPP matrix, resulting in a significant improvement in the optical properties.
在本工作中，合成了一种芳基磷酸盐成核剂（APAl-12C），它是通过月桂酰氧基取代铝羟基双2,2'-亚甲基-双(4,6-二叔丁基苯基)磷酸盐上的羟基而得到的，通过增加分子量，它可以改善成核剂与等规聚丙烯（iPP）基体之间的分散性，并降低成核剂在iPP基体中的迁移可能性。通过傅里叶红外光谱（FT-IR）和氢核磁共振（H NMR）对成核剂APAl-12C的结构进行了分析。差示扫描量热仪（DSC）结果表明，单独添加APAl-OH或APAl-12C在结晶行为方面不如商业成核剂NA-21（APAl-OH与月桂酸锂的化合物），这可能是由于金属锂在结晶性能中的重要性。因此，用APAl-12C、月桂酸锂（二月桂酸锂）和iPP基体制备了iPP/A12C-Li复合材料。系统研究了iPP/A12C-Li复合材料的结晶行为、形态学、光学和力学性能，并与iPP/NA-21复合材料进行了比较。在添加0.5 wt%的iPP/A12C-Li复合材料中，APAl-12C/二月桂酸锂具有最快的结晶速率，并且在不改变透明度的情况下将纯iPP的雾度值从36.03%降低到9.89%，这比iPP/NA-21复合材料更好。这是由于月桂酰氧基取代后APAl-12C的极性减弱以及在iPP基体中更好的分散性，从而使光学性能得到显著改善。
