| 成核剂对聚乳酸结晶行为及热性能的影响 |
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| 引用本文： | 邹俊,何伟,张竞,马腾,吴建.成核剂对聚乳酸结晶行为及热性能的影响[J].塑料科技,2012,40(2):67-71. |
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| 作者姓名： | 邹俊 何伟 张竞 马腾 吴建 |
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| 作者单位： | 江苏科技大学材料科学与工程学院,江苏 镇江,212003 |
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| 基金项目： | 江苏省科技支撑计划(工业)项目 |
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| 摘 要： | 采用熔融共混法制备了聚乳酸/成核剂复合材料,通过结晶速率测试仪、偏光显微镜(POM)、差示扫描量热仪(DSC)、X射线衍射仪(XRD)和负荷热变形温度测定仪对材料的结晶行为及热行为进行了研究。结果表明:与滑石粉相比,多酰胺类化合物(TMC)在聚乳酸基体中的成核效果更为明显,TMC的加入未改变聚乳酸的晶型,但显著提高了聚乳酸的结晶速率和结晶度;当所有样品在120℃下退火2 min时,与纯聚乳酸及滑石粉成核的聚乳酸相比,TMC成核的聚乳酸耐热温度最高,可达105.6℃。
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| 关 键 词： | 聚乳酸 成核剂 等温结晶 耐热性 |
Effects of Nucleation Agent on Crystallization and Thermal Properties of PLA |
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| Zou Jun
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He Wei
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Zhang Jing
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Ma Teng
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Wu Jian.Effects of Nucleation Agent on Crystallization and Thermal Properties of PLA[J].Plastics Science and Technology,2012,40(2):67-71. |
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| Authors: | Zou Jun He Wei Zhang Jing Ma Teng Wu Jian |
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| Affiliation: | School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China |
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| Abstract: | PLA/nucleation agent composites were prepared by melt-blending.The effects of nucleation agent on the crystallization and thermal properties of PLA were investigated by the optical polarimetry tester,polarized optical microscopy(POM),differential scanning calorimetry(DSC),X-ray diffraction(XRD) and heat deflection temperature tester.The results indicate that: TMC is an effective nucleating agent for PLA.The overall crystallization rate and crystallinity of PLA/TMC are higher than those of PLA/Talc.PLA/TMC exhibites the diffraction peaks which can be ascribed to the crystal structure of PLA.All the samples are annealed at 120 ℃ for 2 min,compared to neat PLA and PLA/Talc,the HDT values of PLA/TMC is about 105.6℃. |
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| Keywords: | Poly(lactic acid) Nucleation agent Isothermal crystallization Heat resistance |
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