Effect of organoclay on the mechanical/thermal properties of microcellular injection molded PBT-clay nanocomposites
Effect of organoclay on the mechanical/thermal properties of microcellular injection molded PBT-clay nanocomposites
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DOI：
10.1016/j.icheatmasstransfer.2010.06.010
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发表时间：
2010-10-01
影响因子：
7
通讯作者：
Lai, Ying-zhong
中科院分区：
文献类型：
--
作者：
Hwang, Shyh-shin;Liu, Sung-po;Lai, Ying-zhong
将有机改性蒙脱石（MMT）与聚对苯二甲酸丁二醇酯（PET）在双螺杆挤出机中复合。然后通过传统方法和微孔方法注射成型有机粘土 PBT 纳米复合材料。使用氮气作为发泡剂。研究了有机粘土含量、有机粘土尺寸（8 和 35 pm）以及螺杆速度（80 和 100 rpm）对机械和热性能的影响。结果表明，当MMT含量为1.0 wt.%时，纳米复合材料具有最大的拉伸强度、耐磨性和泡孔密度。而且，粒径越大，拉伸强度越大。混炼过程中的螺杆转速也影响机械强度。螺杆的较高速度增加了纳米复合材料的拉伸强度。 MMT 的添加也有助于提高 PBT/粘土纳米复合材料的热稳定性。 WXRD结果表明，当MMT负载量为1.0 wt%时，纳米复合材料具有最大的d-间距结构。 TEM 结果表明，MMT 负载量为 1.0 wt.% 时，MMT 良好分散在纳米复合材料上。 (C) 2010 Elsevier Ltd. 保留所有权利。
An organically modified montmorillonite (MMT) was compounded with polybutylene terephthalate (PET) 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, organoclay size (8 and 35 pm), and speed of the screw (80 and 100 rpm) on the mechanical and thermal properties were 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 larger the particle size, the greater 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. The addition of MMT also helped the thermal stability of the PBT/clay nanocomposites. The WXRD results showed that when MMT loading is 1.0 wt%, the nanocomposites have maximum d-spacing structure. TEM results showed that MMT is well dispersed on the nanocomposites at a MMT loading of 1.0 wt.%. (C) 2010 Elsevier Ltd. All rights reserved.