skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Reactive processing of textile-natural fiber reinforced anionic polyamide-6 composites

Abstract

Nowadays natural fiber, used in reinforced composites, is widely concerned. However, no natural fiber reinforced reactive thermoplastic polymer grades had been prepared so far. Through our studies, it was demonstrated that there was a severe retardation and discoloration occurred in the reactive processing between anionic polyamide-6 (APA-6) and natural fiber, which result in incomplete polymerization when put together. In order to solve the problem, two methods were adopted in this paper, which are fiber pretreatment and usage of a new-style initiator called caprolactam magnesium bromide. The former is to remove sizing agent and impurities on the surface of fiber, and the latter is to weaken the side reactions between APA-6 and natural fiber by the nature of its lower reactivity and weaker alkaline. In cooperation with both methods, the severe retardation and discoloration had been improved significantly, so that the polymerization of APA-6 in natural fiber was occurred smoothly. Following textile-natural fiber reinforced APA-6 composites with an average thickness of 2.5 mm and a fiber volume content of 50% was prepared by vacuum assisted resin transfer molding (VARTM). The soxhlet extraction, dilute solution viscometry and differential scanning calorimeter (DSC) measurements respectively suggested the degree of conversion, viscosity-average molar mass and crystallizationmore » of composites was up to 94%, 11.3×104 and 50%. Remarkable improvement of mechanical properties were achieved through dynamic mechanical analysis (DMA), tensile and three-point bending test. Favorable interfacial adhesion and wettability were revealed by scanning electron microscopy (SEM) observation. Therefore, all of the above good performance make this new-style and environmentally friendly composites have broad application prospects.« less

Authors:
; ; ; ;  [1]
  1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan (China)
Publication Date:
OSTI Identifier:
22391854
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1664; Journal Issue: 1; Conference: PPS-30: 30. International Conference of the Polymer Processing Society, Cleveland, OH (United States), 6-12 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; ADHESION; BENDING; CALORIMETRY; COMPOSITE MATERIALS; CRYSTALLIZATION; FIBERS; MAGNESIUM BROMIDES; MECHANICAL PROPERTIES; MOLDING; POLYAMIDES; POLYMERIZATION; REINFORCED MATERIALS; RESINS; SCANNING ELECTRON MICROSCOPY; SOLVENT EXTRACTION; TEXTILES; THERMOPLASTICS; VISCOSITY; WETTABILITY

Citation Formats

Kan, Ze, Chen, Peng, Liu, Zhengying, Feng, Jianmin, and Yang, Mingbo. Reactive processing of textile-natural fiber reinforced anionic polyamide-6 composites. United States: N. p., 2015. Web. doi:10.1063/1.4918432.
Kan, Ze, Chen, Peng, Liu, Zhengying, Feng, Jianmin, & Yang, Mingbo. Reactive processing of textile-natural fiber reinforced anionic polyamide-6 composites. United States. doi:10.1063/1.4918432.
Kan, Ze, Chen, Peng, Liu, Zhengying, Feng, Jianmin, and Yang, Mingbo. Fri . "Reactive processing of textile-natural fiber reinforced anionic polyamide-6 composites". United States. doi:10.1063/1.4918432.
@article{osti_22391854,
title = {Reactive processing of textile-natural fiber reinforced anionic polyamide-6 composites},
author = {Kan, Ze and Chen, Peng and Liu, Zhengying and Feng, Jianmin and Yang, Mingbo},
abstractNote = {Nowadays natural fiber, used in reinforced composites, is widely concerned. However, no natural fiber reinforced reactive thermoplastic polymer grades had been prepared so far. Through our studies, it was demonstrated that there was a severe retardation and discoloration occurred in the reactive processing between anionic polyamide-6 (APA-6) and natural fiber, which result in incomplete polymerization when put together. In order to solve the problem, two methods were adopted in this paper, which are fiber pretreatment and usage of a new-style initiator called caprolactam magnesium bromide. The former is to remove sizing agent and impurities on the surface of fiber, and the latter is to weaken the side reactions between APA-6 and natural fiber by the nature of its lower reactivity and weaker alkaline. In cooperation with both methods, the severe retardation and discoloration had been improved significantly, so that the polymerization of APA-6 in natural fiber was occurred smoothly. Following textile-natural fiber reinforced APA-6 composites with an average thickness of 2.5 mm and a fiber volume content of 50% was prepared by vacuum assisted resin transfer molding (VARTM). The soxhlet extraction, dilute solution viscometry and differential scanning calorimeter (DSC) measurements respectively suggested the degree of conversion, viscosity-average molar mass and crystallization of composites was up to 94%, 11.3×104 and 50%. Remarkable improvement of mechanical properties were achieved through dynamic mechanical analysis (DMA), tensile and three-point bending test. Favorable interfacial adhesion and wettability were revealed by scanning electron microscopy (SEM) observation. Therefore, all of the above good performance make this new-style and environmentally friendly composites have broad application prospects.},
doi = {10.1063/1.4918432},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1664,
place = {United States},
year = {2015},
month = {5}
}