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：
- Received：21 May 2023，
  
  Revised：2023-6-27，
  
  Accepted：13 July 2023，
  
  Online First：23 August 2023，
  
  Published：01 February 2024
- Accepted：
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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, 2024, 42(2): 213-222.
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, 2024, 42(2): 213-222. 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

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

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