Promotion of zeolite as dispersion support for properties improvement of α nucleating agent in polypropylene

Meng, Xin; Tong, Chuangchuang; Xin, Zhong; Gong, Weiguang; Shi, Yaoqi; Chen, Weijie; Yan, Sheng

doi:10.1007/s10965-019-1757-x

Cited by 6 publications

(1 citation statement)

References 38 publications

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“…The size of the dispersed phase in PP is smaller, and the stiffness of the PP is increased ob viously [20]. Meng et al increased the dispersion of the NA-11 in the iPP by adding zeo lite containing hydrogen bonds, accelerating the crystallization rate and improving the tensile strength and the flexural modulus [21]. These studies have suggested that reduc ing the size or dispersion of the nucleating agents by physical addition can improve the nucleation efficiency.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Metal Lithium and Alkyl Chain in the Nucleating Agent Lauroyloxy-Substituted Aryl Aluminum Phosphate on the Crystallization and Optical Properties for iPP

et al. 2022

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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 1H 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.

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Section: Introductionmentioning

confidence: 99%