四针状氧化锌晶须对聚乳酸结晶行为的影响  

Effect of Tetrapod-Like Zinc Oxide Whisker on Crystallization Behaviors of Polylactide

作　　者：杜海南 李白千 毕云鹏[1] 张杰[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]佛山市日丰企业有限公司,广东佛山528000

出　　处：《现代塑料加工应用》2015年第1期33-36,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金项目资助(基金号51010004)

摘　　要：运用差示扫描量热仪、偏光显微镜研究了四针状氧化锌晶须（T—ZnOw）对聚乳酸（PLA）等温结晶的结晶动力学、结晶热力学、晶体结构等结晶行为的影响。结果表明：110℃是PLA的最佳结晶温度，此时PLA结晶速率最快，半结晶时间最短；在90～130℃随等温结晶温度升高，试样的结晶度增大。T-ZnOw可以加快PLA结晶速率，这种作用在90℃时最明显，随着温度的增加减弱；但是，T—ZnOw会影响PLA的结晶热力学，使结晶度降低，这种作用在130℃时最明显，随着温度的降低减弱。此外，T-ZnOw会细化PLA晶粒。Abstract：The effect of tetrapod-like zinc oxide whisker（T ZnOw） on the crystallization behaviors of polylactide（PLA）, including crystallization kinetics, crystallization thermody- namics and crystal structures of isothermal crystallization, was studied by DSC and polari- zing microscope. T for PI.A, at which is the shortest;and he results show that 110 ℃ is the optimal crystallization temperature the crystallization the crystallinity of rate is the highest and the semi-crystallization time the samples increases with the isothermal crystalli zation temperature increasing from 90 ℃ to 130 ℃ prove the crystallization rate of PLA, and this effect clines with the increase of temperature; howeve and decreases the declines with the thermodynamics at 130 ℃ and PI.A crystalline particles crystallinity of The addition of T ZnOw can im is the most obvious at 90 ℃ and de r, T-ZnOw influences the crystallization PLA, and this effect is the most obvious decrease of temperature. Furthermore, T-ZnOw refines

关 键 词：四针状氧化锌晶须 成核剂 聚乳酸 等温结晶 结晶动力学 结晶热力学 

分 类 号：O633.14[理学—高分子化学]