PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE

Tian-nan Zhou; Hong Yang; Nan-ying Ning; Yu-fang Xiang; Rong-ni Du; Qiang Fu

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PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE

Papers | Updated：2021-06-21

- PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE
- PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE
- 高分子科学（英文版） 2010年28卷第1期页码：77-83
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- 纸质出版：2010-01-20
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Tian-nan Zhou, Hong Yang, Nan-ying Ning, 等. PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE[J]. 高分子科学（英文版）, 2010,28(1):77-83.

Tian-nan Zhou, Hong Yang, Nan-ying Ning, et al. PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE[J]. 2010, 28(1): 77-83.
Tian-nan Zhou, Hong Yang, Nan-ying Ning, 等. PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE[J]. 高分子科学（英文版）, 2010,28(1):77-83. DOI：

Tian-nan Zhou, Hong Yang, Nan-ying Ning, et al. PARTIAL MELTING AND RECRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE[J]. 2010, 28(1): 77-83. DOI：

摘要

A relatively high predetermined crystallization temperature (135°C) was chosen to grow well developed iPP spherulites

then the partial melting was carried out at a temperature of 165°C

where the preformed spherulites were seen to only decrease their size but not completely melted. The crystallization behavior of partially melted isotactic polypropylene (iPP) has been carefully examined by different scanning calorimetry (DSC) and polarized light microscopy (PLM). The experimental results show that at a special annealing temperature (165°C) the melting behavior of iPP includes two parts with different mechanism

one part is the melting of iPP spherulite outside

another is the partial lamellae perfection during longer annealing time in the unmelted spherulite. The conformational orders of the iPP melt decrease with the increase of the annealing temperature.

Abstract

A relatively high predetermined crystallization temperature (135°C) was chosen to grow well developed iPP spherulites

then the partial melting was carried out at a temperature of 165°C

one part is the melting of iPP spherulite outside

another is the partial lamellae perfection during longer annealing time in the unmelted spherulite. The conformational orders of the iPP melt decrease with the increase of the annealing temperature.

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