基于链间氢键调控实现高倍拉伸制备CoPA 6/66高强纤维的研究  

Preparation of high-strength CoPA 6/66 fiber by super-drawing based on interchain hydrogen bond regulation

作　　者：宋明 张华 陈欣 冯新星 李细林 谌继宗 梁铁贤 严玉蓉[3,4] SONG Ming;ZHANG Hua;CHEN Xin;FENG Xinxing;LI Xilin;SHEN Jizong;LIANG Tiexian;YAN Yurong(Guangdong Xinhui Meida Nylon Co.,Ltd,Jiangmen 529100;Institute of Quartermaster Engineering&Technology,Systems Engineering Institute,Academy of Military Sciences,Beijing 100010;School of Materials Science and Engineering,South China University of Technology,Guangdong 510640;Guangdong Key Laboratory of High Performance&Functional Polymer Materials Research Center,South China University of Technology,Guangzhou 510640)

机构地区：[1]广东新会美达锦纶股份有限公司,广东江门529100 [2]军事科学院系统工程研究院军需工程技术研究所,北京100010 [3]华南理工大学材料科学与工程学院,广东广州510640 [4]华南理工大学广东省高性能与功能高分子材料重点实验室,广东广州510640

出　　处：《合成纤维工业》2022年第3期11-16,共6页China Synthetic Fiber Industry

基　　金：国家自然科学基金(51873074);广东省企业重点实验室项目(2020B21202005)。

摘　　要：基于“同系物共聚内增塑”的思路,通过调整第二单体聚酰胺66(PA 66)盐含量,合成不同共聚比的共聚聚酰胺6/66(CoPA 6/66),并经熔融纺丝制得强度超过8.0 cN/dtex的CoPA 6/66纤维,研究了共聚比对初生纤维的可拉伸性及纤维力学性能的影响,并采用变温红外光谱对CoPA 6/66初生纤维的酰胺Ⅰ带进行了分析。结果表明:CoPA 6/66初生纤维的最大可拉伸比随CoPA 6/66共聚比的增加而增加,纤维强度在共聚比为94∶6后趋于平缓;在相同纺丝加工温度下,CoPA 6/66初生纤维中的非键合羰基比例高于PA 6,但在高温拉伸条件下,共聚物主链规整性的破坏使得CoPA 6/66分子链间相对于PA 6有大量的非键合羰基存在,从而实现初生纤维的高倍拉伸和高强纤维的制备。Based on the idea of "internal plasticization through homologous copolymerization", polyamide 6/66 copolymer(CoPA 6/66) with different copolymer ratio was synthesized by adjusting the content of polyamide 66(PA 66) salt as the second monomer and was produced into CoPA 6/66 fiber with a strength over 8.0 cN/dtex by melt spinning. The effects of copolymer ratio on the stretchability and mechanical properties of as-spun fiber were studied, and the amide Ⅰ band of as-spun CoPA 6/66 fiber was analyzed by temperature-dependent infrared spectroscopy. The results showed that the maximum stretchable ratio of as-spun CoPA 6/66 fiber increased with the increase of CoPA 6/66 copolymer ratio, and the fiber strength tended to be moderate when the copolymer ratio reached 94∶6;and the proportion of non-bonded carbonyl groups in as-spun CoPA 6/66 fiber was higher than that of PA 6 at the same spinning temperature, however, the destruction of the copolymer main chain regularity caused the existence of a relatively large number of non-bonded carbonyl groups between CoPA 6/66 molecular chains over PA 6 molecular chains under the high-temperature drawing condition, so as to realize the super-drawing of as-spun fiber and the preparation of high-strength fiber.

关 键 词：高强纤维 共聚聚酰胺 内增塑 氢键 高倍拉伸 

分 类 号：TQ342.11[化学工程—化纤工业]