| 镧化物改性超细碳酸钙对PET非等温结晶行为的影响 |
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| 引用本文： | 郭涛,王炼石,蔡彤,曾祥斌.镧化物改性超细碳酸钙对PET非等温结晶行为的影响[J].高分子材料科学与工程,2005,21(3):173-176. |
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| 作者姓名： | 郭涛 王炼石 蔡彤 曾祥斌 |
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| 作者单位： | 华南理工大学材料科学与工程学院,广东,广州,510640;广州金发科技股份有限公司,广东,广州,510520 |
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| 基金项目： | 广东省自然科学基金资助项目(31366) |
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| 摘 要： | 用DSC研究了镧化物改性超细碳酸钙与成核剂NA对PET非等温结晶行为的影响,并对其结晶成核能力进行了分析。结果表明,各成核剂均使PET的结晶温度和结晶度提高,结晶峰半峰宽变窄。非等温结晶动力学分析表明各样品的Avrami指数介于3～5,成核剂的加入使PET的结晶动力学常数增加而半结晶时间缩短。根据过冷温度和过热温度,成核剂的结晶成核能力大小顺序为UCaCO3-5La3+>NA>UCaCO3-10La3+>UCaCO3-1La3+。
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| 关 键 词： | 聚对苯二甲酸乙二醇酯 超细碳酸钙 镧化物 非等温结晶 结晶动力学 |
| 文章编号： | 1000-7555(2005)03-0173-04 |
| 修稿时间： | 2003年9月25日 |
EFFECT OF ULTRA-FINE CaCO3 MODIFIED BY La3+ ON NON-ISOTHERMAL CRYSTALLIZATION BEHAVIOR OF PET |
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| GUO Tao,WANG Lian-shi,CAI Tong-min,ZENG Xiang-bin.EFFECT OF ULTRA-FINE CaCO3 MODIFIED BY La3+ ON NON-ISOTHERMAL CRYSTALLIZATION BEHAVIOR OF PET[J].Polymer Materials Science & Engineering,2005,21(3):173-176. |
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| Authors: | GUO Tao WANG Lian-shi CAI Tong-min ZENG Xiang-bin |
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| Affiliation: | GUO Tao~1,WANG Lian-shi~1,CAI Tong-min~,ZENG Xiang-bin~2 |
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| Abstract: | Effects of ultra-fine calcium carbonate(UCaCO_3) modified by compound of Lanthanum(La~(3+)) and a type of nucleating agent(NA) on non-isothermal crystallization behavior of polyethylene terephthalate(PET) were studied by differential scanning calorimetry(DSC). The results show that compared with pure PET, nucleated PET shows a higher crystallization temperature and crystallinity, and a more narrow half-height width of crystallization peak. The study of non-isothermal crystallization kinetics shows that the Avrami index between 3~5, the crystallization kinetics parameter is increased and the half-crystallization time is shortened by nucleating agents. According to the temperature of supercooling and superheating, the order of nucleating ability of nucleating agents: UCaCO_3-5La~(3+)>NA>UCaCO_3-10La~(3+)> UCaCO_3-1La~(3+). |
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| Keywords: | polyethylene terephthalate(PET) Ultra-Fine CaCO_3 compound of lanthanum Non-Isothermal crystallization crystallization kinetics |
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