摘要
以马来酸酐接枝高密度聚乙烯(HDPE-g-MAH)为相容剂,在双螺杆挤出机上通过原位增容反应制备了高密度聚乙烯/尼龙1012(HDPE/PA1012)复合材料。实验发现随着HDPE-g-MAH加入量的增加,复合材料的维卡软化温度(VST)呈现先增加,然后迅速下降的趋势。当加入3%的相容剂时,复合材料的维卡软化温度达到最大值171℃,相比纯HDPE的维卡软化温度高出近50℃。当相容剂的质量分数增加至20%,复合材料的维卡软化温度降至128℃,与纯HDPE相近。通过对不同相容剂含量的复合材料进行断面SEM分析,发现复合材料中PA1012分散在HDPE基体中的成丝状结构,其耐温性能与丝状结构密切相关,并用DSC分析了复合材料的结晶行为。
High density polyethylene （HDPE）/nylon 1012 （PAIO12） composites were prepared by in situ reaction via the twin-screw extruder with HDPE-g-MAH as the compatilizer. It is found that with the increase of HDPE-g-MAH content, vicat softening temperature （lIST） of the composites increases first and then decreases rapidly. When adding 3wt% compatilizer, lIST of the composites reaches its maxmum point of 171 ~C, higher than that of pure HDPE by nearly 50 ~C. When the mass fraction of compatilizer reached 20wt%, VST of the composites drops to 128 ~C, closed to pure HDPE. According to scanning electron microscope analysis on the fracture surfaces of the composites, PA1012 with fiber structure is dispersed in the HDPE matrix and the heat resistant of the composites is closely related to the fiber phase structure. The crystallization behavior of the composites was analyzed by differential scanning calorimetry.
出处
《塑料工业》
CAS
CSCD
北大核心
2016年第9期112-116,共5页
China Plastics Industry
关键词
耐温性能
相容剂
结晶行为
微观形态
Heat Resistance
Compatilizer
Crystallization Behavior
Microstructure
