摘要
对聚乳酸(PLA)纤维级树脂切片的性能进行测试分析,利用纺粘无纺布机制备PLA气流牵伸熔纺纤维,并借助视频显微镜、差式扫描量热仪、万能材料测试仪对其形貌、热学性能、拉伸性能等进行表征。结果表明:PLA树脂的熔点为168.7℃,PLA气流牵伸纤维的纵向表面光滑平直,截面呈圆形,纤维线密度随牵伸强度的增加而减小,纤维的断裂强度随牵伸强度的增大呈现增大趋势,断裂伸长率呈现先增大后减小趋势。通过气流牵伸,纤维的玻璃化转变温度Tg和熔点Tm得到提升,冷结晶峰温度Tc减小,结晶度随牵伸强度的提高呈现先增大后减小的趋势。
The properties of polylactic acid(PLA)resin were first studied.The air drafted PLA fibers were then manufactured by the spun-bonded nonwoven fabric equipment.The morphology,thermal properties and tensile properties of PLA fibers were characterized by the video microscope,differential scanning calorimeter and universal material tester.The results showed that the melting point of PLA resin was 168.7℃.The longitudinal surface of PLA fibers was smooth and straight,and the cross section was round.The linear density of PLA fibers decreased with the increase of intensity of air drafting.The breaking strength increased,whereas the elongation at break firstly increased and then decreased as the intensity of air drafting raised.Moreover,the glass transition temperature(Tg)and melting point(Tm)of PLA fibers increased,and the cold crystallization temperature(Tc)decreased via the air drafting.The crystallinity of PLA fibers firstly increased and then decreased with the increase of intensity of air drafting.
作者
邢剑
徐珍珍
李大伟
倪慶清
Xing Jian;Xu Zhenzhen;Li Dawei;Ni Qingqing(International Cooperation Research Center of Textile Structure Composite Materials,Anhui Polytechnic University,Wuhu 241000;Key Laboratory of Science&Technology of Eco-Textile,Ministry of Education,Jiangnan University,Wuxi 214122;Department of Functional Machinery&Mechanics,Shinshu University,Tokida Ueda 386-8576)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第11期183-187,共5页
New Chemical Materials
基金
安徽省自然科学基金项目(1908085QE181)
生态纺织教育部重点实验室开放基金(KLET1712)。
关键词
聚乳酸纤维
气流牵伸
结晶性能
力学性能
polylactic acid fiber
air drafting
crystallization behavior
mechanical property
