Preparation and interfacial modification of polyamide 6/bidirectional warp⁃knitted glass fiber composites

doi:10.19491/j.issn.1001-9278.2022.05.005

Abstract

Abstract:

The bidirectional warp?knitted glass fibers （BWKGF） were modified with 3?aminopropyltriethoxysilane and to?luene diisocyanate to prepare k?BWKGF and t?BWKGF， respectively. Polyamide 6 （PA6）/BWKGF， PA6/k?BWKGF， and PA6/t?BWKGF composites were then prepared through a thermoplastic resin transfer molding process. The structures of modified BWKGF and the microstructure and mechanical properties of the composites were characteri?zed using an infrared spectroscope， a field emission scanning electron microscope， and a universal testing machine. The results indicated that the surfaces of k?BWKGF and t?BWKGF were grafted with active groups. The surface roughness of BWKGF increased and the interfacial bonding between BWKGF and PA6 was improved after modification. In addition， the mechanical properties of the composites were improved due to the surface modification of BWKGF. The tensile strength of PA6/k?BWKGF and PA6/t?BWKGF reached 130 MPa and 140 MPa， respectively， which were 44.5 % and 55.5 % higher than that of PA6/BWKGF， respectively.

Key words: glass fiber, polyamide 6, anionic polymerization, composite, mechanical property

CLC Number:

TQ323.6

CHEN Sheng, LIANG Yingchao, WU Fangjuan, FANG Hui, FAN Xinfeng, CHEN Hui, WANG Yonggang. Preparation and interfacial modification of polyamide 6/bidirectional warp⁃knitted glass fiber composites[J]. China Plastics, 2022, 36(5): 24-28.

Figures/Tables 7

References 13

1	孙银宝，李宏福，张博明. 连续纤维增强热塑性复合材料研发与应用进展［J］. 航空科学技术， 2016， 27（5）： 1⁃7.
	SONG Y B， LI H F， ZHANG B M. Development and app⁃lication progress of continuous fiber reinforced thermoplastic composites ［J］. Aeronautical Science and Technology， 2016， 27（5）： 1⁃7.
2	张豫坤，牛宏校，邓晨兴. 碳纤维增强热塑性树脂基复合材料的力学性能研究［J］. 当代化工研究， 2017，6： 66⁃67.
	ZHANG Y K， NIU H X， DENG C X. Mechanical properties of carbon fiber reinforced thermoplastic resin group composite materials ［J］. Modern Chemical Research， 2017，6： 66⁃67.
3	龚友坤，宋增瑞，宁慧铭，等. 连续纤维增强热塑性复合材料成型工艺的研究进展［J］. 河北工业大学学报， 2020， 49（2）： 1⁃26.
	GONG Y K， SONG Z R， NING H M， et al. Advances in research on molding process of continuous fiber reinforced thermoplastic composites ［J］. Journal of Hebei University of Technology， 2020， 49（2）： 1⁃26.
4	邢开，徐海兵，颜春，等. 碳纤维增强高性能热塑性复合材料界面改性的研究进展［J］. 玻璃钢/复合材料， 2019（5）： 110⁃115.
	XING K， XU H B， YAN C， et al. Research progress on interface modification of carbon fiber reinforced high⁃performance thermoplastic composites ［J］. Fiber Reinforced Plastics/Composites， 2019（5）： 110⁃115.
5	LI J. Interfacial studies on the O₃ modified carbon fiber⁃reinforced polyamide 6 composites ［J］. Applied Surface Scien⁃ce， 2008， 255（5）： 2 822⁃2 824.
6	CHO B G， HWANG S H， PARK M， et al. The effects of plasma surface treatment on the mechanical properties of polycarbonate/carbon nanotube/carbon fiber composites ［J］. Composites Part B， 2018， 160： 436⁃445.
7	CHEN H， CAI Q， WU J， et al. Interfacial enhancement of carbon fiber/nylon 12 composites by grafting nylon 6 to the surface of carbon fiber ［J］. Applied Surface Science， 2018， 441： 538⁃545.
8	KARSLI N G， YILMAZ T， GUL O. Effects of coupling agent addition on the adhesive wear， frictional and thermal properties of glass fiber⁃reinforced polyamide 6，6 composi⁃tes ［J］. Polymer Bulletin， 2018， 75（10）： 4 429⁃4 444.
9	孙鹏，金涛，田帅，等. 硅烷偶联剂改性玻璃纤维增强PA6研究［J］. 化工新型材料， 2016， 44（1）： 205⁃207.
	SUN P， JIN T， TIAN S， et al. Study on the modified glass fiber reinforcement of silane coupling ［J］. New Chemi⁃cal Materials， 2016， 44（1）： 205⁃207.
10	杨敏鸽，王亚亮，王俊勃，等. TDI优化改性苎麻纤维研究［J］. 纺织高校基础科学学报， 2010， 23（1）： 91⁃94.
	YANG M G， WANG Y L， WANG J B， et al. Study on TDI optimization modified ramie Fiber ［J］. Basic Scien⁃ces Journal of Textile Universities， 2010， 23（1）： 91⁃94.
11	RIJSWIJK K V， LINDSTEDT S， VLASVELD D P N， et al. Reactive processing of anionic polyamide⁃6 for application in fiber composites： A comparative study with melt processed polyamides and nanocomposites ［J］. Polymer Testing， 2006， 25（7）： 873⁃887.
12	王晓东，高鑫，宋艳江，等. 偶联剂处理玻纤改性热塑性聚酰亚胺［J］. 塑料工业， 2007，7： 22⁃24，30.
	WANG X D， GAO X， SONG Y J， et al. Coupling agent treatment glass modified thermoplastic polyimide ［J］. China Plastics Industry， 2007，7： 22⁃24，30.
13	王林，王梦尧，王佩勋，等. 偶联剂改性玄武岩纤维增强水泥基复合材料力学性能［J］. 材料导报， 2019， 33（2）： 273⁃277.
	WANG L， WANG M Y， WANG P X， et al. Mechanical properties of coupling modified basalt fiber reinforced cement⁃based Composites［J］. Materials Reports， 2019， 33（2）： 273⁃277.

样品	拉伸强度/MPa	拉伸模量/GPa
PA6/BWKGF	91±10	1.39±0.03
PA6/t⁃BWKGF	130±15	1.51±0.08
PA6/k⁃BWKGF	140±5	1.41±0.05

样品	拉伸强度/MPa	拉伸模量/GPa
PA6/BWKGF	91±10	1.39±0.03
PA6/t⁃BWKGF	130±15	1.51±0.08
PA6/k⁃BWKGF	140±5	1.41±0.05

BWKGF/KH550质量比	拉伸强度/MPa	拉伸模量/GPa
100/0.25	75±13	1.36±0.03
100/0.5	140±4	1.39±0.05
100/1	86±10	1.36±0.05
100/2	81±5	1.23±0.04

BWKGF/KH550质量比	拉伸强度/MPa	拉伸模量/GPa
100/0.25	75±13	1.36±0.03
100/0.5	140±4	1.39±0.05
100/1	86±10	1.36±0.05
100/2	81±5	1.23±0.04

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