超柔软高吸湿改性聚对苯二甲酸乙二醇酯纤维的制备及其性能  

Preparation and properties of modified polyester fiber for super softness and high hygroscopy

作　　者：亓晓杰 孙莉娜 廖海洋 马博谋 俞建勇 王学利 刘修才 QI Xiaojie;SUN Li′na;LIAO Haiyang;MA Bomou;YU Jianyong;WANG Xueli;LIU Xiucai(College of Textiles,Donghua University,Shanghai201620,China;Innovation Center for Textile Science and Technology,Donghua University,Shanghai201620,China;Cathay Biotech Inc.,Shanghai201203,China)

机构地区：[1]东华大学纺织学院,上海201620 [2]东华大学纺织科技创新中心,上海201620 [3]上海凯赛生物技术研发中心有限公司,上海201203

出　　处：《纺织学报》2023年第9期27-34,共8页Journal of Textile Research

基　　金：中央高校基本科研业务费专项资金资助项目(CUSF-DH-2019055)。

摘　　要：为改善聚对苯二甲酸乙二醇酯(PET)纤维的柔软性和亲水性能,分别以戊二胺己二酸盐(PA56盐)及其衍生物对己二酸戊二酰胺(APA56)为改性单体,与对苯二甲酸乙二醇酯(BHET)共聚并进行熔融纺丝,制备了2个系列的新型改性PET纤维。借助声速取向度测量仪、X射线衍射仪和纱线强伸仪等对改性PET纤维的性能进行测试和分析。结果表明:随着改性单体摩尔分数的增加,PET纤维的结晶度逐渐降低,力学性能有所下降,但当摩尔分数小于6%时,改性PET纤维保留了较好的力学性能;改性单体摩尔分数为3%~12%时,相比于PET纤维,PA56盐和APA56改性PET纤维的回潮率分别提高了39%~200%和53%~213%,相对弯曲刚度分别降低了18%~71%和40%~88%,APA56较PA56盐改性PET纤维的柔软性更好;改性单体摩尔分数达到6%及以上时,改性聚酯纤维的柔软性基本可达到细羊毛水平。Objective Polyethylene terephthalate(PET)fibers have excellent mechanical properties,stable thermal and chemical properties,and are widely used in industrial,home textile,and apparel fields.However,because of its regular macromolecular chain structure and the lack of hydrophilic groups,the softness and moisture absorption of the fibre and fabrics made from it are poor,leading to low wearing comfort.This research aims to improve the softness and high moisture absorption of PET fiber.Method Two series of modified PET fibers containing different molar fractions(3%,6%,9%and 12%)of modified monomers and different drafting multipliers were prepared by melt spinning ethylene terephthalate(BHET)copolymerized with glutaramide adipate(PA56 salt)and its derivative p-adipic acid diamide(APA56),respectively,combined with the two-step method of spinning undrafted yarn followed by progressive drafting.The properties of modified PET fibers were tested and analyzed with the aid of an acoustic velocity orientation meter,an X-ray diffractometer,and a yarn tensiometer.Results The orientation and crystallinity of modified PET fibers were found lower than those of PET fibers,and the orientation and crystallinity decreased gradually with the increase of the molar fraction of modified monomers,but increased with the increase of the draft multiple(Fig.1 and Fig.3).The modified PET fiber was still trigonal as PET and the crystal shape does not change,but the diffraction peak was gradually weakened and the peak broadened as the molar fraction of the modified monomer was increased(Fig.2).The breaking strength and initial modulus of modified PET fibers also decreased with the increase of the molar fraction of modified monomer,and the strength of fibers decreased while the softness increased.When the molar fraction was below 6%,the breaking strength of fibers could reach more than 2.0 cN/dtex,illustrating better mechanical properties(Fig.4 and Fig.5).For the same molar fraction of PA56 salt and APA56 modified PET fiber,the former showed highe

关 键 词：戊二胺己二酸盐 对己二酸戊二酰胺 改性聚酯纤维 柔软性 吸湿性 

分 类 号：TQ[化学工程]