对叔丁基杯[8]芳烃成核剂对聚乳酸结晶行为的影响-学兔兔 www.xuetutu.com.pdf

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2010年第39卷第9期
PETROCHEMICAL TECHINOLOGY
对叔丁基杯[8]芳烃成核剂对聚乳酸
结晶行为的影响
胡东康
(华东退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200237)
[摘要:用DSC和POM技术分析了型成核剂对叔丁基8.芳烃(TBC8-d)对聚乳酸结行为的影响。实验结果表明,
TBC8-d足种高效的聚乳酸成核剂,与纯聚乳酸相比,加入TBC8-d的聚乳酸的结晶温度和相对结晶度分别提高了14.℃和
1.1%;日TBC8-d的成核能力优于传统成核剂滑石粉。等温结晶动力学研究表期,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,晶速率常数増大;用TBC8-d成核的聚乳酸的结品长方式为异相城核的三维球品牛长
关键词]成核剂;聚乳酸;结昆;对叔∫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
Wen Liang, Xin Zhong, Hu Dongkang
(slate-key Laboratory of Chemical Engineering, UNILAB Research Center of Chemical Reaction Engineerin
East China University of Science and Technology, Shanghai 200237, China)
Abstract] Effects of nucleating agent -ter-butylcalix [8] arene(tbc8-d) on crystallization and
melting 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. 1 C and 11. I%, respectively. The
nucleating ability of Tbc8-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有石油基代芳基磷酸金属类成核剂与滑石粉复配叮以提
塑料制品的潜力,并可以解决环境污染问题。但高楽乳酸的结晶速率。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,优异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2。为克杯芳烃是种有效的聚乳酸成核剂
服上述缺点,将各种成梭剂添加到聚乳酸中。
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対叔丁基杯[8]芳烃(TBC8-d)对聚乳酸结
聚乳酸刈聚乳酸结品行为的影响。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」20-06-15,L修政稿目期」200-06-16
究了多壁碳纳米筲对聚乳酸结昂行为的影响,发现
[作者简介]温亮(1983~)明,辽宁省盘锦市人,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
wenliang8306@163.com。联系人:辛忠,电活(021-642.52972、电邮
zha 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」上海市科委学科带头人计则日(10XD40950ら
脂酰胺是有效的聚乳酸成核剂。李春等2发现取等学校博土学科点ら项科研项日。