Studies on the Nucleation and Crystallization of β-Crystal of Polypropylene in Light Calcium Carbonate/Polypropylene Blends.

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (1): 143.

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Studies on the Nucleation and Crystallization of β-Crystal of Polypropylene in Light Calcium Carbonate/Polypropylene Blends.

LIAO Kai-Rong¹, CHEN Xue-Xin¹, ZHENG Chen-Mou²

1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275;
2. Department of Chemistry, Zhongshan University, Guangzhou, 510275

Received:1994-01-07 Revised:1994-04-20 Online:1995-01-24 Published:1995-01-24

Abstract

Abstract: The phenomenon of nucleation and crystallization of β-crystal of polypropylene(PP)in light calcium carbonate(L-CaCO₃)/PPblends was studied by X-ray diffraction and differential scanning calorimetry. It was found that the nucleation and crystallization of βcrystal of PPin L-CaCO₃/PPblends was dependent on the PPsamples used. Aluminate coupling agents have a synergistic effect on the nucleation and crystallization of β-crystal of PPin L-CaCO₃/PPblends. It is believed tl1at the phenomenon of nucleation and crystallization of β-crystal of PPin L-CaCO₃/PPblends is the result of the action of a complex nucleation agent composed of residues of the catalyst used for polymerization of propylene and L-CaCO₃,and the aluminates may be considered as promoters in the complex nucleation agent.

Key words: Light calcium carbonate, Aluminate, Polypropylene, β-crystal, Nucleation and crystallization

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LIAO Kai-Rong, CHEN Xue-Xin, ZHENG Chen-Mou. Studies on the Nucleation and Crystallization of β-Crystal of Polypropylene in Light Calcium Carbonate/Polypropylene Blends.[J]. Chem. J. Chinese Universities, 1995, 16(1): 143.

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Studies on the Nucleation and Crystallization of β-Crystal of Polypropylene in Light Calcium Carbonate/Polypropylene Blends.

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