Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc

Hong-Wen Sun; Fu-Shan Wang; Yan Gao; Fu-Qing Wei; Jia-Chun Feng

doi:10.1007/s10118-023-3027-y

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Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc

RESEARCH ARTICLE | Updated：2024-01-12

- Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc
- Chinese Journal of Polymer Science Vol. 42, Issue 2, Pages: 213-222(2024)
- Affiliations：
  
  a.State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
  b.Lanzhou Petrochemical Corporation of PetroChina, Lanzhou 730060, China
  c.Lanzhou Petrochemical Research Center, Petrochemical Research Institute of PetroChina, Lanzhou 730060, China
- Author bio：
  
  jcfeng@fudan.edu.cn
- Funds：
- DOI：10.1007/s10118-023-3027-y
  CLC：
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Sun, H. W.; Wang, F. S.; Gao, Y.; Wei, F. Q.; Feng, J. C. Significantly enhanced melt memory effect of metallocene-made isotactic polypropylene containing talc. Chinese J. Polym. Sci. 2024, 42, 213–222

Hong-Wen Sun, Fu-Shan Wang, Yan Gao, et al. Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc. [J]. Chinese Journal of Polymer Science 42(2):213-222(2024)
Sun, H. W.; Wang, F. S.; Gao, Y.; Wei, F. Q.; Feng, J. C. Significantly enhanced melt memory effect of metallocene-made isotactic polypropylene containing talc. Chinese J. Polym. Sci. 2024, 42, 213–222 DOI： 10.1007/s10118-023-3027-y.

Hong-Wen Sun, Fu-Shan Wang, Yan Gao, et al. Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc. [J]. Chinese Journal of Polymer Science 42(2):213-222(2024) DOI： 10.1007/s10118-023-3027-y.

摘要

The remarkably enhanced melt memory effect of M-PP containing talc was ascribed to the stabilization of oriented nuclei facilitated by talc.

Abstract

The melt memory effect is a widely observed phenomenon in semi-crystalline polymers. In practical applications, various additives are usually introduced into polymers, which may affect their melt memory behavior. In this work, the effect of talc on the melt memory effect of metallocene-made isotactic polypropylene (M-PP) was investigated in detail by using the differential scanning calorimetry. The results indicated that the introduction of talc significantly strengthened the melt memory effect of M-PP. Specifically, the upper limit temperature of ,Domain II, increased from 161 °C to 174 °C, resulting in a substantial widening of the temperature range of ,Domain IIa, from 1 °C to 14 °C. Analysis of the crystal orientation of the M-PP containing talc cooled from various ,T,s, suggested that the remarkably enhanced melt memory effect could be ascribed to the stabilization of oriented nuclei facilitated by talc. This stabilizing effect was likely attributable to the prefreezing effect or the sorption interaction between talc and the M-PP chains.

关键词

Keywords

Metallocene-made isotactic polypropyleneTalcMelt memory effectCrystal orientation

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