聚乳酸/邻苯二甲酸二辛脂/丁腈橡胶热塑性硫化胶的形态演变  

Morphology evolution of polylactic acid/dioctyl phthalate/nitrile rubber thermoplastic vulcanizates

作　　者：张琳[1] 王君豪 王兆波[1] ZHANG Lin;WANG Jun-hao;WANG Zhao-bo(College of Materials Science and Engineering,Qingdao University of Science and Technology, Qingdao 266042,China;Qingdao No 9 High School,Qingdao 266555,China)

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042 [2]山东省青岛第九中学,山东青岛266555

出　　处：《合成橡胶工业》2019年第1期17-20,共4页China Synthetic Rubber Industry

基　　金：山东省自然科学基金资助项目(ZR 2017 MEM021)

摘　　要：采用动态硫化法制备了聚乳酸(PLA)/邻苯二甲酸二辛脂(DOP)/丁腈橡胶(NBR)共混型热塑性硫化胶(TPV),通过场发射扫描电子显微镜研究了动态硫化过程中橡胶相的形态演变,采用能量分散X射线谱研究了动态硫化产物微观相态的结构,并考察了动态硫化时间对TPV力学性能的影响。结果表明,随着动态硫化反应的进行,NBR相在交联的同时增大了与树脂相之间的黏度差,并形成独特的双连续相结构。在动态硫化过程中,两相的尺寸均随动态硫化时间的延长而明显减小,并由此带来了TPV力学性能的改善。Thermoplastic vulcanizates( TPV) based on polylactic acid( PLA)/dioctyl phthalate/nitrile rubber( NBR) were prepared by dynamic vulcanization. The morphology evolution of NBR phase structure was studied by field emission scanning electron microscope,and the microscopic structure of dynamically vulcanized specimens was characterized by energy dispersive X-ray spectroscopy;moreover,the influence of dynamic vulcanization time on the mechanical properties of the prepared TPV was also investigated. The results showed that the viscosity difference between the NBR rubber phase and the PLA resin phase was increased during the dynamic vulcanization, leading to the forming of the unique co-continuous phase microstructure. The size of both the two co-continuous phases were decreased with the increasing dynamic vulcanization time,while the mechanical properties of the TPV were improved remarkably.

关 键 词：聚乳酸 丁腈橡胶 动态硫化 形态演变 微观相态 力学性能 

分 类 号：TQ334.9[化学工程—橡胶工业]