取向与润湿作用对PEG-b-PCL超薄膜结晶行为的影响  

Effect of Orientation and Wetting on Crystallization Behavior of PEG-b-PCL Ultrathin Film

作　　者：梁明慧[1] 海士坤[1] 张伟娜 于翔 Liang Minhui;Hai Shikun;Zhang Weina;Yu Xiang(Commen Subjects Department,Shangqiu Medical College,Shangqiu 476100,China;Department of Material and Chemical Engineering,Henan University of Engineering,Zhengzhou 450000,China)

机构地区：[1]商丘医学高等专科学校公共学科部,河南商丘476100 [2]河南工程学院材料与化学工程学院,河南郑州450000

出　　处：《塑料科技》2019年第9期31-35,共5页Plastics Science and Technology

基　　金：河南省教育厅2018年河南省高等学校重点科研项目(18A430024);2018年河南省科技发展计划项目(182102310611);2017年河南省高等学校青年骨干教师培养计划项目(2017GGJS282);商丘医学高等专科学校博士科研启动项目;博士后基金项目

摘　　要：采用溶液旋涂与取向法制备了聚乙二醇-聚己内酯嵌段共聚物(PEG-b-PCL)超薄膜,然后利用原子力显微镜(AFM)和差示扫描量热仪(DSC)系统地表征了PEG-b-PCL超薄膜晶体形貌、结构以及片晶厚度的取向依赖性。结果表明:利用超薄膜形貌证实了取向有利于共聚物的结晶;随着取向速度的提高,去润湿孔径不断增大,片晶厚度也逐渐增大,由多孔片晶转变为树枝状晶体。因此可通过取向控制超薄膜的晶体结构。Polyethylene glycol-polycaprolactone block copolymer(PEG-b-PCL)ultrathin films were prepared by solution spin-coating and orientation method.The crystal morphology,structure and orientation dependence of the thickness of PEG-b-PCL ultrathin films were systematically characterized by atomic force microscopy(AFM)and differential scanning calorimetry(DSC).The results show that orientation is beneficial to the crystallization of copolymers.With the increase of orientation speed,the dewetting pore size increases,and the thickness of lamellae increases,and the lamellae change from porous lamellae to dendritic crystals.Therefore,the crystal structure of ultrathin films can be controlled by orientation.

关 键 词：聚乙二醇-聚己内酯嵌段共聚物 超薄膜 取向 片晶厚度 

分 类 号：TQ326.9[化学工程—合成树脂塑料工业]