连续亚麻纤维增强聚乳酸预浸带的制备及性能  

Fabrication and Properties of Continuous Flax-Reinforced Polylactic Acid Prepreg Tapes

作　　者：刘常衡 朱凯丽 谭洪生[1] 马晓敏[1] 王杰 邢海妮 郑利杭 李秋红[1] Changheng Liu;Kaili Zhu;Hongsheng Tan;Xiaomin Ma;Jie WangHaini Xing;Lihang Zheng;Qiuhong Li(School of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,China;Shandong Qinghe Chemical Technology Co.,Ltd,Zibo 255000,China)

机构地区：[1]山东理工大学材料科学与工程学院,山东淄博255000 [2]山东清河化工科技有限公司,山东淄博255000

出　　处：《高分子材料科学与工程》2020年第2期53-59,共7页Polymer Materials Science & Engineering

摘　　要：采用自行设计和组装的连续纤维增强热塑性复合材料实验流水线制备了连续亚麻纤维增强聚乳酸(C-Flax/PLA)预浸带。通过力学性能、动态力学、傅里叶变换红外光谱、差示扫描量热及偏光显微镜分析等方法研究了C-Flax及相容剂对预浸带性能及结晶行为的影响。力学性能分析表明,C-Flax及相容剂对PLA材料的增强效果明显;当纤维的质量分数为55%时,预浸带拉伸强度达到235.75 MPa,较PLA提高了300%,已进入碳素结构钢的行列。动态力学性能分析表明,C-Flax/PLA预浸带的储能模量较PLA显著提高,且玻璃化转变温度向高温移动,预示着材料抵抗外力变形能力明显提升。结晶行为研究表明,加入C-Flax后,材料的Avrami指数(n)明显提高,通过与晶体生长速率常数(Z_c)及偏光显微镜图像比较发现,C-Flax起到了诱导结晶的作用,但阻碍了PLA晶体的生长。The continuous flax fiber reinforced polylactic acid(C-Flax/PLA) prepreg tapes were prepared by self-designed and assembled continuous fiber reinforce thermoplastic composites experimental pipeline. The effects of C-Flax and compatilizer on the properties and crystallization behavior of prepreg tapes were studied by mechanical properties, DMA, FT-IR, DSC and POM. Results of tensile strength show that the C-Flax and compatibilizer have obvious reinforcing effect on PLA. When the fiber mass fraction is 55%, the tensile strength of the prepreg tapes reaches 235.75 MPa, increased by 300% as compared to PLA, and has entered the ranks of carbon structural steel. DMA measurements show that the storage modulus of the C-Flax/PLA prepreg tapes are significantly increased compared with pure PLA, and T_g shifts to higher temperature, indicating that the deformation resistance ability is obviously improved. The results of crystallization behavior show that, the Avrami index of the materials is increased significantly after adding C-Flax. Combining with Z_c and POM images, the results indicate that the C-Flax acts to induce crystallization, but hinders the growth of PLA crystals.

关 键 词：连续亚麻纤维增强 聚乳酸 预浸带 相容剂 诱导结晶 

分 类 号：TB332[一般工业技术—材料科学与工程]