| 纳米CaCO3 对物理老化前后PC/PS性能的影响 |
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| 引用本文： | 李谷,王庆国,丁茜,江娟,麦堪成.纳米CaCO3 对物理老化前后PC/PS性能的影响[J].中山大学学报(自然科学版),2011,50(1). |
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| 作者姓名： | 李谷 王庆国 丁茜 江娟 麦堪成 |
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| 作者单位： | 1. 中山大学化学与化学工程学院∥聚合物复合材料及功能材料教育部重点实验室,广东,广州,510275;中山大学化学与化学工程学院∥新型聚合物材料设计合成与应用广东省高校重点实验室,广东,广州,510275
2. 中山大学化学与化学工程学院∥聚合物复合材料及功能材料教育部重点实验室,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 通过差示扫描量热法和动态力学分析对PC/PS/纳米CaCO3和PC/PS/包覆纳米CaCO3复合材料物理老化前后PS相的玻璃化转变、β松弛及动态力学性能进行了研究。结果表明：纳米CaCO3有利于PS相的分子链段松弛运动，PC/PS/纳米CaCO3复合材料PS相的Tg、损耗模量峰温和β松弛温度下降；包覆纳米CaCO3增加相界面间相互作用，PC/PS/包覆纳米CaCO3复合材料PS相的Tg、β松弛温度、储存模量和损耗模量峰温均较PC/PS/纳米CaCO3提高。随着物理老化时间的延长，PC/PS及复合材料PS相的Tg和β松弛温度提高，松弛热焓ΔH增加，其中，PC/PS/包覆纳米CaCO3的提高幅度较小。物理老化使得PC/PS/纳米CaCO3的存储模量提高。
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| 关 键 词： | 纳米CaCO3 物理老化 β松弛 |
| 收稿时间： | 2010-11-06; |
The Effect of Nano-CaCO3 on PC/PS Properties before and after Physical Aging |
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| LI Gu,WANG Qingguo,DING Qian,JIANG Juan,MAI Kancheng.The Effect of Nano-CaCO3 on PC/PS Properties before and after Physical Aging[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2011,50(1). |
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| Authors: | LI Gu WANG Qingguo DING Qian JIANG Juan MAI Kancheng |
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| Institution: | (1. School of Chemistry and Engineering∥Key Laboratory Chemical for Polymeric Composite and Functional Materials of Ministry of Education, Sun Yat sen University, Guangzhou 510275,China;2. School of Chemistry and Chemical Engineering∥Key Laboratory of Designed Synthesis and Application of Polymer Material, Sun Yat sen University, Guangzhou 510275 ,China) |
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| Abstract: | The glass transition (Tg), β relaxation and dynamic mechanical properties of PC/PS/ nano CaCO3 and PC/PS/encapsulated nano CaCO3 composites before and after physical aging were characterized by DSC and DMA analysis, in order to study the effect of nano fillers on the segment relaxation movement of PS. The results showed that the nano CaCO3 accelerated the segment relaxation of PS due to the weak interaction between the matrix and the nano particles, the Tg, loss modulus peak temperature and β relaxation temperature of PS phase decrease. On the contrary, encapsulated nano CaCO3 preferred to improve the interface interaction and thus increased the Tg temperature, the loss modulus peak temperature,β relaxation temperature and storage modulus of PC/PS/encapsulated nano CaCO3 composites compared with PC/PS/nano CaCO3 composites. The Tg and enthalpy loss of PC/PS, PC/PS/nano CaCO3 and PC/PS/encapsulated nano CaCO3 composites all increased with the time of physical aging, but the increment was fewer for PC/PS/encapsulated nano CaCO3 composites. Physical aging induced different enhancement in the storage modulus of PC/PS/nano CaCO3 composite. |
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| Keywords: | PS Tg |
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