张须臻,杨一格,刘少波,王秀华,孙燕琳,陈文兴
ZHANG Xu-zhen,YANG Yi-ge,LIU Shao-bo,WANG Xiu-hua,SUN Yan-lin,CHEN Wen-xing

• 1:桐昆集团股份有限公司
• 2:浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室

摘要(Abstract)：

以PET和PTT为原料通过熔融纺丝制备了具有自卷曲性能的并列复合纤维,研究了复合纤维制备工艺,探索并明确了两组分配比、牵伸倍率、热定形温度等参数对纤维断面形貌、力学性能、卷曲回弹性能的影响。试验结果表明:随着复合纤维中PTT组分从40%逐渐增加至60%,纤维断面保持8字形,且两相界面的熔接痕始终保持PTT相凸向PET相的形貌,同时纤维的弹性模量逐渐降低;牵伸倍率的增大能够显著提升纤维的强度、模量以及卷曲收缩率,但纤维的断裂伸长率及卷曲稳定度变差;在144～168℃范围内,热定形温度为156℃时,纤维的弹性模量、强度及卷曲收缩率较高,这主要是结晶度提高导致的。
A series of parallel composite fibers with self-crimping properties were prepared via melt spinning with PET and PTT as raw materials. The influence of preparation technology of the composite fiber includes the ratio of two components, drafting ratio, heat setting temperature on the cross-section morphology,mechanical properties and crimp resilience were investigated. The results show that with the increase of PTT content from 40% to 60%, the cross section of the composite fiber keeps figure 8, and the fusion mark of the two-phase interface always keeps the shape in which PTT phase protruding to PET phase, while the elastic modulus of the composite fiber decreases gradually. The strength, modulus and crimp recovery of the fiber are significantly increased with the increase of drafting ratio, but the elongation at break and crimp stability of the fiber become weak. In the heat setting temperature range in 144～168 ℃, the elastic modulus,strength and crimp recovery rate of the fiber are higher at 156 ℃, which is mainly caused by the increase of crystallinity.

关键词(KeyWords)： PET/PTT;自卷曲;纺丝工艺;卷曲收缩;结晶度
PET/PTT;self-crimping;spinning technology;crimp recovery;crystallinity

Abstract:

Keywords:

基金项目(Foundation): 中国博士后科学基金项目(项目号2018M630691)

作者(Author): 张须臻,杨一格,刘少波,王秀华,孙燕琳,陈文兴
ZHANG Xu-zhen,YANG Yi-ge,LIU Shao-bo,WANG Xiu-hua,SUN Yan-lin,CHEN Wen-xing

DOI: 10.16090/j.cnki.hcxw.2020.03.001

参考文献(References)：

• [1]TOBIAS F,PABLO G D,FELIPE E,et al.Active site flexibility as a hallmark for efficient PET degradation by I.sakaiensis PETase[J].Biophysical Journal,2018,114(6):1302-1312.
• [2]WU G,JIANG J D,TUCKER P A,et al.Oriented noncrystalline structure in PET fibers prepared with threadline modification process[J].Journal of Polymer Science Part B Polymer Physics,1996,34(12):2035-2047.
• [3]HOTTER J F,CUCULO J A,TUCKER P A,et al.Effect of liquid isothermal bath position in modified poly(ethylene terephthalate)PET melt spinning process on properties and structure of as-spun and annealed filaments[J].Journal of Applied Polymer Science,1998,69(10):2051-2068.
• [4]RWEI S P,LIN Y T,SU Y Y.Study of self-crimp polyester fibers[J].Polymer Engineering&Science,2010,45(6):838-845.
• [5]LIN T,WANG H,WANG X.Self-crimping bicomponent nanofibers electrospun from polyacrylonitrile and elastomeric polyurethane[J].Advanced Materials,2005,17(7):2699-2703.
• [6]IAROSSI I,AMYOTTE P R,KHAN F I,et al.Explosibility of polyamide and polyester fibers[J].Journal of Loss Prevention in the Process Industries,2013,26(6):1627-1633.
• [7]陈四海.PET/PTT自卷曲纤维双组分配置、热处理及其结构性能分析[D].上海:东华大学,2010.
• [8]OH T H.Effects of spinning and drawing conditions on the crimp contraction of side-by-side poly(trimethylene terephthalate)bicomponent fibers[J].Journal of Applied Polymer Science,2006,102(2):1322-1327.
• [9]CAO Y.Spinning and properties of PET/PTT self-crimp composite filament yarns[J].Journal of Textile Research,2011,32(2):6-10.
• [10]GUO J,ZHENG N,CHEN Y T.Study on influence of crimping performance of PET/PTT self-crimp yarn treated with moist heat[J].Advanced Materials Research,2011,287-290:2547-2551.
• [11]XIAO H,SHI M W,LIU L L,et al.The crystallinity and orientation structure and crimp properties of PET/PTT bicomponent filament[J].Polymer Bulletin,2013,627:110-116.
• [12]XIAO H,SHI M,LIU J.Structures and properties of PET/PTT filament at different temperatures[J].Journal of Textile Research,2008,29(8):6-10.
• [13]XIAO W,YU H,HAN K,et al.Study on PET fiber modified by nanomaterials:Improvement of dimensional thermal stability of PET fiber by forming PET/MMT nanocomposites[J].Journal of Applied Polymer Science,2005,96(6):2247-2252.
• [14]CHEN S,WANG S.Latent-crimp behavior of PET/PTT elastomultiester and a concise interpretation[J].Journal of Macromolecular Science Part B,2011,50(7):1447-1459.
• [15]LUO J,XU G B,WANG F M.External configuration and crimp parameters of PTT(Polytrimethylene terephthalate)/PET(Polyethylene terephthalate)conjugated fiber[J].Fibers and Polymers,2009,10(4):508-512.