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采用离子交换法制备了十二烷基磺酸钠和衣康酸共同改性水滑石(LDHs2),FTIR、XRD分析表明,十二烷基磺酸钠和衣康酸能够同时进入水滑石片层之间,层间距有很大提高。利用改性水滑石,通过马来酸酐-苯乙烯共接枝改性聚丙烯相容剂的熔融共混和聚丙烯与水滑石溶液共混制备母粒,然后与聚丙烯分别熔融共混两种方法制备聚丙烯/水滑石纳米复合材料。TEM分析表明,马来酸酐-苯乙烯共接枝改性聚丙烯作相容剂可以使水滑石在聚丙烯基体中达到更好分散。DSC、XRD分析表明,水滑石、相容剂以及短链共聚聚丙烯对聚丙烯晶型没有影响,但对其结晶速率、结晶度以及晶粒大小有所改变,复合材料中聚丙烯的起始结晶温度、结晶峰温度、结晶速率、结晶度均比纯聚丙烯高,晶粒粒径分布也更均匀。
Sodium dodecyl sulfate and itaconic acid co-modified hydrotalcite (LDHs2) were prepared by ion exchange method. The results of FTIR and XRD showed that sodium dodecyl sulfate and itaconic acid could enter the hydrotalcite layer Between the layer spacing has greatly improved. The modified hydrotalcite was used to prepare masterbatch by melt blending of polypropylene compatibilizer grafted with maleic anhydride-styrene and blending with polypropylene and hydrotalcite, then melt blending with polypropylene separately Preparation of polypropylene / hydrotalcite nanocomposites. TEM analysis showed that the maleic anhydride-styrene graft copolymer modified polypropylene as a compatibilizer can make the hydrotalcite dispersed better in the polypropylene matrix. DSC and XRD analysis showed that hydrotalcite, compatibilizer and short-chain copolymerized polypropylene had no effect on the crystalline form of PP, but the crystallization rate, crystallinity and grain size changed. The onset of polypropylene in the composite Crystallization temperature, crystallization peak temperature, crystallization rate, crystallinity are higher than pure polypropylene, the grain size distribution is more uniform.