摘要
利用X射线衍射仪(XRD)、差示扫描量热仪(DSC)及力学性能测试技术,研究了超临界CO2喷射(20 MPa、100℃、对喷时间30 min)过程中拉伸对涤纶结构和性能的影响,从而为探究超临界CO2喷染过程中PET纤维的染色行为,实现超临界CO2染色技术的连续化操作奠定试验和理论基础。结果表明:超临界CO2喷射过程中,PET纤维的晶粒尺寸随拉力增加而增大,沿拉伸方向增加缓慢,沿横向增加很快。无论是否拉伸PET样品,超临界CO2喷射都会导致纤维结晶度的增加;而且拉力越大,PET样品的结晶度越高;超临界CO2喷射过程中,纤维的断裂强度随拉力增加而增大,相反断裂伸长率随拉力增加而降低。
The X-Ray Diffraction,Differential Scanning Calorimetry and mechanical properties test technology are used to study the effect of tension on the structures and properties of PET fibers during spray in supercritical carbon dioxide,which can lay the experimental and theoretical basis for exploring the dyeing behavior of PET fiber in supercritical CO2 spray(20 MPa,100℃,spraying time of 30 min)dyeing and realizing the continuous operation of supercritical CO2 dyeing technology.The results indicate that crystal size during supercritical carbon dioxide spray increases with the increase of tensile force;and crystal size increases slowly along the chain direction and rapidly in the lateral directions.Regardless of the tension on samples,the crystallinity in PET samples increases;and the higher the tension is,the higher the crystallinity of PET sample is.In supercritical carbon dioxide spray,the breaking tenacity of samples increases with the increase of tensile force;on the contrary,the breaking elongation decreases with increasing tension.
作者
袁淑英
王威强
孙发玉
李飞
YUAN Shuying;WANG Weiqiang;SUN Fayu;LI Fei(School of Mechanical Engineer,Shandong University,Ji’nan 250061,China;Shanda-Lunan Research Institute of Supercritical Fluid Technology,Ji’nan 250061,China)
出处
《上海纺织科技》
北大核心
2020年第2期1-4,9,共5页
Shanghai Textile Science & Technology
基金
国家自然科学基金面上资助项目(21676162)
山东省科技发展计划(2014GGX108001)
关键词
拉力
结晶度
染色
热性能
力学性能
tension
crystallinity
dyeing
thermal property
mechanical property
