Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water

Zhi-liang Wang; Jia-li Xu; Lian-jia Wu; Xin Chen; Shu-guang Yang; Hui-chao Liu; Xian-ju Zhou

doi:10.1007/s10118-015-1682-3

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Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water

PAPER | Updated：2021-06-21

- Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water
- Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water
- Chinese Journal of Polymer Science 2015年33卷第9期页码：1334-1343
- Affiliations：
  
  a.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
  b.R & D Center, Guangdong Xinhui Meida Nylon Co., LTD., Jiangmen 529100, China
  c.Department of Mathematics and Physics, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
- Author bio：
  
  **Shu-guang Yang (杨曙光), E-mail: shgyang@dhu.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(51373032);Innovation Program of Shanghai Municipal Education Commission, Fundamental Research Funds for the Central University and DHU Distinguished Young Professor Program. Z.W. thanks the support from Chinese Universities Scientific Fund(CUSFDH-D-2014025)
- DOI：10.1007/s10118-015-1682-3
  中图分类号：
- 收稿：2015-02-14，
  
  修回：2015-04-25，
  
  录用：2015-04-25，
  
  纸质出版：2015-09
- Accepted：
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Zhi-liang Wang, Jia-li Xu, Lian-jia Wu, 等. Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water[J]. Chinese Journal of Polymer Science, 2015,33(9):1334-1343.

Zhi-liang Wang, Jia-li Xu, Lian-jia Wu, et al. Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water[J]. Chinese Journal of Polymer Science, 2015, 33(9): 1334-1343.
Zhi-liang Wang, Jia-li Xu, Lian-jia Wu, 等. Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water[J]. Chinese Journal of Polymer Science, 2015,33(9):1334-1343. DOI： 10.1007/s10118-015-1682-3.

Zhi-liang Wang, Jia-li Xu, Lian-jia Wu, et al. Dissolution, Hydrolysis and Crystallization Behavior of Polyamide 6 in Superheated Water[J]. Chinese Journal of Polymer Science, 2015, 33(9): 1334-1343. DOI： 10.1007/s10118-015-1682-3.

摘要

Abstract

The dissolution

crystallization and hydrolysis behaviors of polyamide 6 (PA 6) in superheated water (140 ℃≤

≤ 200 °C) are investigated. The hydrothermal processing of PA 6 can be divided into four regions: (I)

140 °C

(II) 140 ℃≤

≤ 155 °C

(III) 155 ℃

160 ℃and (IV)

≥ 160 °C. Below 140 °C

the hydrothermal processing does not have obvious impact on PA 6. Between 140 ℃and 155 °C

an annealing effect is observed that the hydrothermally treated resin shows increased melting temperature and lamellar thickness compared with the original PA 6. Between 155 ℃and 160 °C

the hydrothermal processing induces both annealing and surface swelling. Above 160 °C

PA 6 dissolves fully in the superheated water. As PA 6 dissolves in the superheated water

hydrolysis takes place and becomes more prominent at higher temperatures and longer processing time. The hydrolysis induced molecular weight decrease fits an exponential decay.

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