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| PBT/纳米高分子复合材料微细发泡注射成型机械和热性能探讨 |
| Effect of Organoclay on the Mechanical / Thermal Properties of Microcellular Injection Molded PBT-Clay Nanocomposites |
| Received:September 16, 2015 Revised:January 10, 2016 |
| DOI：10.3969/j.issn.1674-6457.2016.01.007 |
| 中文关键词: 纳米黏土 微细发泡 混炼 抗拉强度 复合材料 |
| 英文关键词: compound organoclay nanocomposites microcellular twin-screw extruder |
| 基金项目: |
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| 中文摘要: |
| 主要研究聚丁烯对苯二甲酸酯 （Polybutylene Terephthalate， PBT） /纳米黏土复合材料的传统注塑成型， 以及以氮气（N2）作为发泡剂的微孔注射成型的加工质量。考虑了纳米颗粒尺寸、 纳米材料含量、 混炼螺杆转速对制品机械性能与热性能的影响。PBT/纳米黏土复合材料用双螺杆挤出机混炼方式制备， 试片依据ASTM D638和D256标准进行了测试。根据实验结果， 发现： 传统注塑制品的拉伸强度， 35 μm纳米颗粒结果大于8 μm的， 且混炼中螺杆转速快， 抗拉强度有升高的趋势。抗拉强度从纳米比例0~1.0%（wt）随着纳米比例含量增加而增强的趋势， 纳米比例含量超过1.0%后， 抗拉强度就有下降的趋势。通过热性能实验， 发现加入适量的纳米黏土确能提高材料的热稳定性与结晶度， 但是过量的黏土反而造成性能下降， 与力学性能实验结果吻合。 |
| 英文摘要: |
| An organically modified montmorillonite was compounded with Polybutylene Terephthalate（PBT）in a twin-screw extruder. The organoclay PBT nanocomposites were then injection molded by conventional and microcellular methods. Nitrogen was used as the blowing agent. The effect of organoclay content and particle size on the mechanical and thermal properties was investigated. The results showed that when the MMT content was 1.0 wt%，the nanocomposites have maximum tensile strength，wear resistance，and cell density. Moreover，the bigger the particle size the larger the tensile strength. The screw speed during compounding also affected the mechanical strength. The higher speed of the screw increased the tensile strength of the nanocomposites. |
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