采用冷压烧结工艺制备聚四氟乙烯（PTFE）/纳米CaCO3复合材料,并研究了其性能。实验结果表明,通过差示扫描量热（DSC）分析,少量纳米CaCO3对PTFE结晶度有一定程度提高,起到异向成核作用;复合材料的结晶速率随结晶温度的升高而降低;相同的结晶温度下,复合材料的半结晶时间t1/2和最大结晶时间tmax高于纯PTFE;微观结构观察表明,纳米CaCO3粒子含量较少时,在PTFE基体中可以达到纳米级分散。
The polytetrafluoroethylene（PTFE） composites were prepared with the process of cold pressing and sintering.The results show that the less content of nano-CaCO3 has certain improvement on the crystallinity of the composites through differential scanning calorimetry（DSC）,indicating that the nucleating effect of CaCO3 is significant.The crystallization rates of composites are decreased with the increase of crystallization temperature.On the same crystallization temperature,the composites semi-crystallization time（t1/2） and the maximum crystallization time（tmax） are higher than that of pure PTFE.The characterization of the microstructure of composites shows that nano-CaCO3 has been dispersed uniformly in the composites at a nanometer scale when nano-CaCO3 particles content is less.
参考文献
| [1] | 袁绍彦,吕军,罗勇,黄锐.纳米碳酸钙/弹性体/聚苯乙烯体系的力学性能及形态[J].复合材料学报,2005(03):25-29. |
| [2] | 陈宝书,栾道成,魏倩,徐涛,赵正平.聚四氟乙烯/纳米CaCO3复合材料制备及性能研究[J].化工新型材料,2010(06):105-107. |
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