Partially Disentanglement of Mono-dispersed Polypropylene and Its Property in the Melt

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (9): 1820.

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Partially Disentanglement of Mono-dispersed Polypropylene and Its Property in the Melt

SUN Qing¹, ZOU Ye-Kui¹, XUE Qi¹, XIAO Zheng-Gang¹, GAO Yun¹, HU You-Liang²

1. Department of Polymer Science & Engineering, Nanjing University, Nanjing 210093, China;
2. State Key Laboratoryof Engineering Plastics, Instituteof Chemistry, Chinese Academy of Sciences, Beijing 100080, China

Received:2002-03-15 Online:2002-09-24 Published:2002-09-24

Abstract

Abstract: When mono-dispersed polypropylene was recovered from liquid paraffin, a solvent of large molar size, at a concentration more than C^*, partially disentangled polypropylene was obtained. The modified polypropylene has a relatively high crystallinity. Furthermore, it has a lower apparent viscosity(η_a) and shear stress(τ) than that of the control samples at the same shear rate(γ). The mechanical properties of the modified polypropylene are almost unchanged, which cannot be found in any other method of modifying the rheological properties of polymer.

Key words: Motallocene-catalyzed polypropylene, Disentanglement, Rheological property

CLC Number:

O631

TrendMD:

SUN Qing, ZOU Ye-Kui, XUE Qi, XIAO Zheng-Gang, GAO Yun, HU You-Liang. Partially Disentanglement of Mono-dispersed Polypropylene and Its Property in the Melt[J]. Chem. J. Chinese Universities, 2002, 23(9): 1820.

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Partially Disentanglement of Mono-dispersed Polypropylene and Its Property in the Melt

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