HDPE增韧PP-R/石墨复合材料力学性能的研究

采用高密度聚乙烯(HDPE)为增韧剂、乙烯 丙烯 二烯三元共聚物(EPDM)、乙烯 辛烯共聚物(POE)为相容剂、石墨为功能性助剂制备了以无规共聚聚丙烯(PP R)或嵌段共聚聚丙烯(PP B)为基体的PP R或PP B／HDPE／石墨复合材料。详细研究了HDPE含量、弹性体种类及含量对PP R或PP B／HDPE／石墨复合材料力学性能的影响。结果表明HDPE用量在20%、EPDM含量为5%时,PP R或PP B复合材料力学性能优异;POE可以实现PP R或PP B／HDPE／石墨复合材料力学性能的平衡。     

PP/共聚PP/POE汽车保险杠专用料的研制

研制了PP／共聚PP／聚烯烃弹性体(POE)汽车保险杠专用料，介绍了POE的结构特点，探讨了POE及共聚PP含量对PP力学等性能的影响。结果表明，POE对PP的增韧优于(乙烯/丙烯／二烯)共聚物(EPDM)，共聚PP在PP／共聚PP／POE体系中也起到增韧作用，该共混料可以满足汽车保险杠性能的要求。     

新型丙烯-乙烯共聚物增韧聚丙烯的研究

丙烯-乙烯共聚物Vistamaxx（VM）是一种丙烯摩尔含量占70％以上的新型弹性体。用VM增韧聚丙烯（PP），考察了PP／VM共混物的力学性能、微观形态结构以及结晶性能，并与乙烯-辛烯共聚物（POE）与PP的共混体系进行了对比。结果表明，常温下VM增韧效果优于POE，PP／VM体系拉伸性能优于PP／POE体系；VM在PP中表现出比POE更好的分散性；VM具有与PP相同的晶型，VM的加入细化了PP的晶粒。     

新型热塑性弹性体增韧聚丙烯的研究

以聚烯烃弹性体(POE,乙烯-辛烯共聚物)为PP的增韧性剂,利用转矩流变仪、差示量热扫描(DSC)及力学性能测试方法,比较研究了PP/POE及PP/EPDM共混物的加工性能、结晶性能及力学性能;结果表明,POE在加工性、改性效果等方面比EPDM更具优势。还探讨了POE用量对PP/CaCO     

POE/HDPE/PP三元复合材料的形貌和力学性能研究

用熔融共混法制备了高密度聚乙烯/聚丙烯(HDPE/PP)和乙烯-辛烯弹性体/高密度聚乙烯/聚丙烯(POE/HDPE/PP)复合材料。通过冲击、弯曲和拉伸测试研究了复合材料的力学性能,采用扫描电镜(SEM)观察了材料的形貌。结果表明,由于HDPE和PP的相容性有限,限制了HDPE对PP综合力学性能的提高;通过添加POE,能改善HDPE/PP共混物的相容性,使HDPE/PP复合材料在保持较高弯曲和拉伸性能的前提下,抗冲击性能获得明显提高。当HDPE/PP的含量比为12/88和POE含量为8wt%时,POE/HDPE/PP三元复合材料的综合力学性能较好。     

POE改性共聚聚丙烯的性能

采用拉力试验机、差示扫描量热仪及扫描电子显微镜等研究了聚烯烃弹性体(POE)对嵌段共聚聚丙烯的增韧效果,重点考察了不同POE及其用量对共混物力学性能、热性能及微观形貌的影响。结果表明:POE的添加对共聚聚丙烯具有明显的增韧效果,且随着POE用量的增加,增韧效果愈加显著,POE-1,POE-2的增韧效果达到进口POE-A水平。     

聚丙烯共混改性研究进展

介绍了聚丙烯共混改性方法,重点阐述了弹性体三元乙丙橡胶EPDM、乙烯-辛烯共聚物POE对聚丙烯的增韧改性,分析了聚丙烯共混改性影响因素,并对聚丙烯共混改性今后的发展提出了建议。     

POE在塑料改性中的应用进展

综述近几年聚烯烃弹性体(POE)与通用塑料、工程塑料共混改性的进展。与改性剂(乙烯／丙烯／二烯)共聚物和(苯乙烯／乙烯—丁烯／苯乙烯)共聚物相比，POE和功能化的POE作为一种新型改性剂能在较低含量下实现材料的脆—韧转变，减少了因加入弹性体造成的材料强度和模量的损失。     

CW169冷热水输送管道系统用的聚丙烯原料

聚丙烯管道系统可选用(1)PP-H(均聚PP),(2)PP-R(无规共聚PP),它是丙烯与另一种烯烃共聚成的无规共聚物,(3)PP-B(嵌段共聚PP),由PP-H或PP-R与橡胶形成两相或多相丙烯共聚物,是一种耐冲击性聚丙烯。PP-R与PP-B的简单区分法,用DSC法测它们的熔点时PP-R为142℃左右而PP-B大于160℃。     

PP-R塑铝稳态复合管用热熔胶对铝粘接性能的研究

研究了无规共聚聚丙烯(PP-R)塑铝稳态复合管用热熔胶的主要成分对热熔胶和铝的粘接性能的影响.结果发现,当基材采用丙烯-乙烯-丁烯三元共聚物,且丙烯-乙烯-丁烯三元共聚物、马来酸酐接枝聚丙烯、乙烯类弹性体、石油树脂质量配比为60:25:10:5时,制备的PP-R塑铝稳态复合管用热熔胶对铝的粘接性能最好,剥离强度达到5....     

HDPE／石墨／POE复合体系力学性能的研究

研究了石墨的表面处理工艺，粒径以及添加量对HDPE力学性能的影响，加之乙烯－辛烯共聚物（POE）来改善HDPE的力学性能，加工性能和耐环境应力开裂性能，结果表明，钛酸酯偶联剂对石墨表面处理效果较好，石墨粒径对材料力学性能影响较大，当POE加入5％（质量）时，体系表现出较好的综合性能，POE，EVA对改善HDPE耐环境应力开裂性是十分有效的。     

无规共聚PP与嵌段共聚PP共混的研究

用IR、DSC、SEM和力学性能测试方法研究了一种无规共聚PP（PP-R）和一种嵌段共聚PP（PP-B）及其共混物的结构与性能。结果表明,PP-R和PP-B都能结晶,但PP-B结晶较慢、结晶度较低;PP-R不含而PP-B含有呈球粒状分散的乙丙橡胶（EPR）相和乙烯嵌段（PE）相;随共混物中PP-B含量增加,常温和低温冲击韧性显著提高,力学强度在略有下降后能持平或回升,这些性能变化是上述PP-R、PP-B结构特点的一种综合效应。     

Preparation of graphite composite bipolar plate for PEMFC

This research studied the preparation of graphite composite using liquid thermosetting plastic such as polyester resin (POE), phenolic modified alkyd resin (PhA) and mixed resin (POE with 10% PhA) as a binder. The morphology, physical, electrical and mechanical properties of the graphite composites were analyzed. The results showed that POE could combine with graphite powder (the 66% wt. saturated of graphite powder) better than PhA and mixed resin and gave higher electrical conductivity (4.52 S/cm). It was also found that epoxy resin could improve the mechanical property of composite plate. The addition of TiO₂ and ZnSt slightly decreased the electrical conductivity and the water absorption. Moreover, it was proposed that TiO₂ could improve the mechanical property. Carbon fiber can increase electrical and mechanical properties and water absorption of the composite with POE as a binder. The mixing of wet-lay mixture with graphite, carbon fiber and POE composite improved the mechanical property and decreased the water absorption.     

PP-R、PP-B管材料专用色母粒的研制

采用无毒、耐候性好、热稳定性高的颜料制得PP－R、PP－B管材料专用色母粒，考察了色母粒对PP－R、PP－B管材料力学性能、耐热性、耐光性、卫生安全性的影响。结果表明：该色母粒对PP－R、PP－B管材专用料的力学性能影响不大，采用该色母粒无需改变PP－R、PP－B管材的生产工艺。     

Mechanical and rheological properties of HDPE/graphite composite with enhanced thermal conductivity

Having been treated with coupling agent and pan‐milling, graphite is incorporated into HDPE to make a HDPE/graphite composite with enhanced thermal conductivity as well as good mechanical properties and processibility. This paper focuses on the study of mechanical properties, thermal stability and rheological behavior of HDPE/graphite composite. The experimental results show that with increase of the graphite content, Young's modulus of HDPE/graphite increases and the elongation at break and impact strength decrease. However, when the graphite content is 35% in HDPE/graphite, the elongation at break and impact strength still remain 22.4% and 85.8J/m. respectively. Also, the yield strength increases with the increase of the graphite content, and reaches the maximum at 55% graphite content, and reduces afterwards. The crystallization temperature and thermal stability of HDPE/graphite increase with the increase of the graphite content. The melt viscosity of the filled HDPE remains almost unchanged, but the shear sensitivity increases, and the temperature sensitivity decreases with the increase of the graphite content. By optimizing the experimental conditions, a HDPE/graphite composite with fairly good comprehensive properties such as enhanced thermal conductivity and stability, good mechanical properties, and processability could be prepared, which has potential application in the field of heat transfer.     

几种不同结构型号PE改性PPR力学性能的研究

研究了线性低密度聚乙烯(LLDPE)/聚丙烯(PPR)共混体系、高密度聚乙烯(HDPE)/聚丙烯(PPR)共混体系、超高分子量聚乙烯(UHMWPE)/聚丙烯(PPR)共混体系的力学性能和熔体流动速率。结果表明,UHMWPE的增韧改性效果最好,在UHMWPE的含量为15%时体系的综合力学性能最好。LLDPE的增韧改性效果次之,HDPE的最差。     

阻燃ABS的增韧研究

分别以苯乙烯-丁二烯-苯乙烯共聚物(SBS)、乙烯-1-辛烯共聚物(POE)、三元乙丙橡胶(EPDM)为增韧剂,研究了它们对阻燃丙烯腈-丁二烯-苯乙烯共聚物(ABS)复合材料力学性能和阻燃性能的影响。结果表明:以SBS为增韧剂所得复合材料的综合性能优于以POE或EPDM为增韧剂所得复合材料;随SBS用量的增大,复合材料的冲击强度提高,当SBS用量为15%时,其冲击强度达到15.91kJ/m2,较未经增韧改性复合材料的冲击强度提高了9.99kJ/m2;并且SBS的加入不会对复合材料的阻燃性能产生不利影响。     

高密度聚乙烯/聚烯烃弹性体/三元乙丙橡胶热塑性弹性体的结构与性能

采用动态硫化法制备了高密度聚乙烯(HDPE)/三元乙丙橡胶(EPDM)热塑性弹性体(TPV),并在基体中添加聚烯烃弹性体(POE)以改善其性能.对所制得的TPV的力学性能、微观相结构和动态黏弹行为进行了研究.结果表明,当HDPE/EPDM(质量比)为40/60时,HDPE/EPDM TPV表现出良好的综合性能;用POE...