对叔丁基杯[8]芳烃成核剂对聚乳酸结晶行为的影响.pdf

2010第39卷第9期
PETROCHEMICAL TECENOLOGY
对叔丁基杯[8]芳烃成核剂对聚乳酸
结晶行为的影响
温亮,辛忠,胡东康
(华东退工大学联合化学反应工程研究所化学工程联合国家重点实验室,上淋200237
[摘要:用DSC和POM技术分析了型成核剂对叔丁基邴8.芳烃(TB8-d)对聚乳酸结行为的影响。实验结果表明,
TBC8-d是种高效的聚乳酸成剂,与纯聚乳酸相比,加入TBC8-d的聚乳酸的结晶混度和相对结昂度分别提高了14.℃和
11.1%:TBC8-d的成核能力仇于传统成核剂滑石粉。等温结晶动力学研究表明.随结品温度的升高,TBC8-d的加人使聚乳
酸的半结品时间缩短,结速率常数增大;用TBC8-d成核的聚乳酸的结品长方式为异相成核的三维球品牛长
关键词]成核剂;聚乳酸;结;对叔了基杯芳烃
文章编号]1000-8144(2010)09-1001-05
[中图分类号]7TQ316.6
文献标识码:A
Effect of p-tert-butylcalix arene Nucleating Agent on
Crystallization of Polylactic Acid
Wer
8
Slate-key Laboratory of Chemical Engineering, UNILAB Research Center of Chemical
l Reacton Engineenng
East China University of Science and Technology, Shanghai 200237, China
Abstract] Effects of nucleating agent 2-tert-butylcalix[8] arene(tbc8-d) on crystallization and
nelting behaviour of polylactic acid (PLA)were studicd by means of DSC and POM. The results
showed that Tbc8-d was a good nucleating agent and after addition of TBC8-D, crystallization
temperature and relative crystallinity of PLA increased by 14. I and 11. I%, respectively. The
nucleating ability of TBC -d was stronger than that of the conventional nucleating agent talcum
powder. Isothermal crystallization kinetics of PLA showed that addition of Tbc8-d could decrease the
half crystallization time and increase the crystallization rate constant. The crystallization of PLA with
Tbc8-d nucleating agent was through three-dimension spherulite growth with heterogeneous
nucleation
L Keywords. nucleating agent; polylactic acid; crystallization; p-tert-butylcalixarene
可生物降解塑料聚乳酸具有代替现有石油基代芳棊磷酸金属盐类成核剂与滑石粉复配可以提
塑料制品的澘力,并可以解决环境污染问题。但高聚乳酸的结晶速率。以上成核剂中,滑石粉以其
由于聚乳酸与其他热塑性塑料相比结晶速率很慢,优昇的性价比广泛用做幾乳酸成核剂。最近发现
使聚乳酸在注塑成型上的应用受到限制。为克杯芳烃是种有效的乳酸成核剂
服上述缺点,将各种成核剂添加到聚乳酸中
本工作用DSC和POM技术分析了新型聚乳酸
Schmidt等研究了传统成核剂滑石粉和右旋成核剂对叔丁基杯[8]芳烃(TBC8-d)对聚乳酸结
聚乳酸刈聚乳酸结晶行为的影响。Ke等报道了
淀粉可以有效提高聚乳酸的结品速率。Li等】研收稿目期」20-03-154L修政稿日期」]2010-06-16
究了多壁碳纳米管对聚乳酸结晶行为的影响,发现
作者筒介]温完(1983-)男,運宇省欲锦市人,博士牛,电邮
碳纳米管可以起到异相晶核的作用,从而提高聚乳
wenliang8306c163.Com。联系人:辛忠,电活021-64252972、电邮
xzh@ecust.edu.cn
酸的结品速率。 Harris等?发现滑石粉和乙撑双硬『基金项目」上市科委学科带头人计则日(10XD40s0高s
脂酰胺是有效的聚乳酸成核剂。李春等に发现取等学校博士学科点项科研某令项日