Reactive Compatibilization and Fiber Preparation of Poly(hexamethylene terephthalamide-<italic style="font-style: italic">co</italic>-hexamethylene adipamide)/Polycaprolactam Blends

Rui Yang; Xu-zhen Zhang

doi:10.11777/j.issn1000-3304.2026.25294

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Reactive Compatibilization and Fiber Preparation of Poly(hexamethylene terephthalamide-co-hexamethylene adipamide)/Polycaprolactam Blends

Research Article | 更新时间：2026-04-01

- Reactive Compatibilization and Fiber Preparation of Poly(hexamethylene terephthalamide-co-hexamethylene adipamide)/Polycaprolactam Blends
- Acta Polymerica Sinica Vol. 57, Issue 4, Pages: 973-985(2026)
- 作者机构：
  
  1.浙江理工大学材料科学与工程学院杭州 310018
  2.现代纺织技术创新中心(鉴湖实验室) 绍兴 312000
- 作者简介：
  
  Xu-zhen Zhang, E-mail: xzz@zstu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.25294
  CLC：
- CSTR：32057.14.GFZXB.2026.7551
- Received：03 November 2025，
  
  Accepted：06 January 2026，
  
  Online First：27 February 2026，
  
  Published：20 April 2026
- 稿件说明：
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杨锐, 张须臻. 聚对苯二甲酸己二胺-己二酸己二胺/聚己内酰胺反应性增容共混改性及其纤维的制备. 高分子学报, 2026, 57(4), 973-985.

Yang, R.; Zhang, X. Z. Reactive compatibilization and fiber preparation of poly(hexamethylene terephthalamide-co-hexamethylene adipamide)/polycaprolactam blends. Acta Polymerica Sinica (in Chinese), 2026, 57(4), 973-985.
杨锐, 张须臻. 聚对苯二甲酸己二胺-己二酸己二胺/聚己内酰胺反应性增容共混改性及其纤维的制备. 高分子学报, 2026, 57(4), 973-985. DOI： 10.11777/j.issn1000-3304.2026.25294. CSTR： 32057.14.GFZXB.2026.7551.

Yang, R.; Zhang, X. Z. Reactive compatibilization and fiber preparation of poly(hexamethylene terephthalamide-co-hexamethylene adipamide)/polycaprolactam blends. Acta Polymerica Sinica (in Chinese), 2026, 57(4), 973-985. DOI： 10.11777/j.issn1000-3304.2026.25294. CSTR： 32057.14.GFZXB.2026.7551.

摘要

针对聚对苯二甲酸己二胺-己二酸己二胺(PA6T-66)因熔点较高、熔体流动性差而难以适用于纺丝的问题，本研究首先采用聚己内酰胺(PA6)与其进行熔融共混，并引入相容剂亚磷酸三苯酯增容，成功制备了PA6T-66/PA6增容共混纤维，并系统分析了其结构与性能. 结果表明：随着PA6组分含量的增加，共混体系的熔体流动性显著提升，熔点下降；当PA6T-66质量份数为40%时，所制备的共混纤维断裂强度达到4.64 cN/dtex，热老化后强度保留率为93%. 此外，相容剂的加入使共混体系的分子量呈现先升高后降低的趋势，在添加0.5%相容剂后共混体系熔点由274.9 ℃降低至272.6 ℃，分子量由19530 g/mol提高至24100 g/mol. 基于该体系制备的纤维断裂强度进一步提升至6.23 cN/dtex，热老化强度保留率仍保持在93%.

Abstract

To address the challenge of spinning poly(hexamethylene terephthalamide-

-hexamethylene adipamide) (PA6T-66) due to its high melting point and poor melt fluidity

this work first adopted melt blending with polycaprolactam (PA6). Triphenyl phosphite (TPP) was introduced as a compatibilizer to enhance compatibility

successfully producing compatibilized PA6T-66/PA6 composite fibers. The structure and properties of the fibers were systematically analyzed. The results indicated that with an increasing PA6 content

the melt fluidity of the blend significantly improved while its melting point markedly decreased. When the mass fraction of PA6T-66 was 40%

the prepared composite fiber achieved a breaking strength of 4.64 cN/dtex and retained

93% of its strength after thermal aging. Furthermore

the addition of the compatibilizer caused the molecular weight of the blend system to first increase and then decrease. After adding 0.5% compatibilizer

the melting point of the blend decreased from 274.9 ℃ to 272.6 ℃

and the molecular weight increased from 19

530 g/mol to 24

100 g/mol. Fibers prepared based on this optimized system exhibited a further enhanced breaking strength of 6.23 cN/dtex

while the strength retention rate after thermal aging remained at 93%.

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⁰

Reactive Compatibilization and Fiber Preparation of Poly(hexamethylene terephthalamide-co-hexamethylene adipamide)/Polycaprolactam Blends

DOI：10.11777/j.issn1000-3304.2026.25294

摘要

Abstract

关键词

Keywords

references