聚丙烯/弹性体/无机粒子三元复合材料研究

以聚烯烃热塑性弹性体(POE)为增韧剂,以玻璃微珠(GB)、纳米CaCO3为增强剂,将传统弹性体增韧方法和新型纳米粒子增韧增强手段相结合,利用双螺杆挤出机,通过熔融共混工艺制备了聚丙烯(PP)/POE/无机粒子三元复合材料。测试了三元复合材料的力学性能,并利用扫描电子显微镜(SEM)对三元复合材料的断面形态进行了研究。     

PP/弹性体/无机粒子三元复合材料的研究

以新型聚烯烃弹性体(POE)为增韧剂,以玻璃微珠、nano-CaCO3为增强剂,将传统的弹性体增韧方法和新型的纳米粒子增韧增强手段相结合,利用双螺杆挤出机,通过熔融共混工艺制备了聚丙烯(PP)/聚烯烃热塑性弹性体(POE)/无机粒子复合材料。测试了复合材料的力学性能并利用扫描电子显微镜(SEM)对三元复合材料的的断面形态进行了研究。     

纳米无机粉体对PP／POE共混物力学性能和形态结构的影响

采用纳米无机粒子对茂金属聚乙烯（POE）弹性体增韧聚丙烯（PP）二元共混体系进行改性。从而制得PP／POE／无机纳米粒子三元复合材料。分别探讨了纳米高岭土和纳米碳酸钙对复合材料拉伸性能和冲击性能的影响，并考察了不同纳米粉体的增强效果。     

PP/弹性体/无机纳米粒子复合材料的研究进展

概述了目前PP 弹性体 无机纳米粒子三元复合体系的研究进展情况,包括:基体树脂的选择与改性、弹性体尤其是新型聚烯烃弹性体(POE)的应用、无机纳米粒子对复合体系的影响、增韧增强机理的研究等。     

PP／弹性体／无机粒子三元复合材料的研究

本文以新型聚烯烃弹性体POE为增韧剂，以玻璃微珠、nano-CaCO3为增强剂，将传统的弹性体增韧方法和新型的纳米粒子增韧增强手段相结合，利用双螺杆挤出机，通过熔融共混工艺制备了聚丙烯（PP）／聚烯烃热塑性弹性体（POE）／无机粒子复合材料。测试了复合材料的力学性能并利用扫描电子显微镜（SEM）对三元复合材料的的断面形态进行了研究。     

PP/弹性体/无机微粒三元复合材料的研究

以新型聚烯烃弹性体POE为增韧剂,以玻璃微珠、纳米CaCO3为增强剂,将传统的弹性体增韧方法和新型的纳米微粒增韧增强手段相结合,利用双螺杆挤出机,通过熔融共混工艺制备聚丙烯（PP）／聚烯烃热塑性弹性体（POE）／无机微粒复合材料。测试了复合材料的力学性能,并利用扫描电子显微镜（SEM）对三元复合材料的的断面形貌进行了研究。     

PP/弹性体/纳米CaCO3三元复合材料研究

以聚烯烃弹性体POE(乙烯辛烯共聚物)为增韧剂，以纳米CaCO3为增强剂，利用双螺杆挤出机，通过熔融共混工艺制备了聚丙烯(PP)／POE／无机纳米粒子复合材料。测试了复合材料的力学性能并利用扫描电子显微镜(SEM)对三元复合材料的断面形态进行了研究。研究结果表明，利用纳米CaCO3对共混物PP／POE进行改性，存在一个最佳用量，一般为5％左右。采取将纳米CaCO3先与POE混合挤出后再与PP进行共混挤出的二步法工艺，复合体系的综合性能较优。     

聚丙烯/弹性体/纳米高岭土三元复合材料的研究

以新型聚烯烃弹性体POE为增韧剂，以纳米高岭土为增强剂，将传统的弹性体增韧方法和新型的纳米粒子增韧增强手段相结合；采用合金化技术和填充复合工艺，制得高性能的聚丙烯复合材料。研究结果表明，纳米高岭土和弹性体POE对PP增韧具有协同作用，呈现的并不是二者独立增韧作用的简单加和，纳米无机粒子对复合体系PP／POE还有增强作用并大大减缓了因POE的加入而导致复合体系强度的降低。     

一种增强、增韧聚丙烯复合材料及其制备方法

本发明涉及一种聚丙烯／弹性体／无机粒子三元复合材料及其制备方法。复合材料各成分的含量按重量百分比为：聚丙烯72—91，POE或MPOE1—13，硫酸钡7—20。先将PP和POE或MPOE以及BaSO4搅拌制成预混料，再用常规设备进行捏合挤出制得所需复合材料。本发明由于选用POE和BaSO4为填料，使该三元复合体系在刚性有所提高或变化不大的前提下，     

超临界CO2辅助挤出PP/POE/nano-CaCO3三元复合材料的微观形态研究

采用带有超临界CO₂注入装置的双阶挤出机组制备了聚丙烯/乙烯-辛烯共聚物/纳米碳酸钙(PP/POE/nano-CaCO₃)三元复合材料,三者配比为100/10/10。采用不同的表征手段分析了三元复合材料的微观形态,探讨了超临界CO2挤出时对分散相的分散作用机理。结果表明,PP/POE/nano-CaCO₃三元复合材料存在一个超临界CO₂最佳注入量(2.0份,质量份,下同),此注入量时样品中弹性体POE粒子的分散粒径最小、粒径分布最窄,nano-CaCO₃粒子同样也分散最均匀,基本看不到大的团聚体;PP晶体尺寸最小、数量最多;注入超临界CO₂后基体中没有生成β晶。     

Mechanical properties,morphology, and crystallization behavior of polypropylene/elastomer/talc composites

In this study, polypropylene/ethylene–octene copolymer (PP/POE) blends, PP/talc, and PP/POE/micro‐talc (MT) composites were fabricated using a twin screw. To estimate the performances of the PP/POE blends, PP/talc, and PP/POE/MT composites, mechanical properties, heat deflection temperature (HDT), thermomechanical analysis, and isothermal crystallization characterization were conducted. Incorporating talc particles increased the tensile strength, flexural properties, and HDT of the PP matrix, but reduced the elongation at break and notched impact strength. The inclusion of POE elastomers in the PP matrix yielded the opposite effect on PP/talc composites. PP/POE/MT composites provide a compromise that improves both the flexural properties and notched impact strength. Moreover, the inclusion of talc particles in PP/POE blends induced heterogeneous nucleation and considerably reduced the crystallization time. Consequently, the time required for processing was also greatly reduced. POLYM. COMPOS., 36:69–77, 2015. © 2014 Society of Plastics Engineers     

EPDM/POE/PP共混制备热塑性弹性体的性能研究

采用动态硫化的方法制备三元乙丙橡胶（EPDM）/聚烯烃弹性体（POE）/聚丙烯（PP）热塑性弹性体,讨论了EPDM、硫化剂、炭黑的用量和填料种类对热塑性弹性体性能的影响。结果表明：随着EPDM用量的增加,EPDM/POE/PP热塑性弹性体的拉伸强度、定伸应力和硬度都呈减小趋势,而拉断永久变形呈上升趋势;随着SP-1055用量的增加,其压缩永久变形显著降低;随着炭黑用量的增加,弹性体的拉伸强度、定伸应力和硬度先下降后增加,而拉断伸长率、拉断永久变形和压缩永久变形先增大后降低;在不同填料种类中用N85作为填料时,弹性体的综合性能最好,压缩永久变形最小。     

不同弹性体增韧聚丙烯的研究

通过双螺杆挤出机制备了三种不同的弹性体EPR、EPDM、POE与PP的共混物,测试了共混物的力学性能, 比较了三种弹性体的增韧效率。结果表明:三种弹性体都是PP有效的增韧剂,其中POE的增韧效率最高,其冲击强度是纯PP的25倍。通过扫描电镜观察了弹性体在PP中的分散,发现POE在基体中相区尺寸最小,其冲击强度最大;EPDM相区尺寸最大,其冲击强度最小,这意味着共混物的相形态与性能有很好的相关性,三种弹性体在PP中分散尺寸不同的主要原因是由于弹性体与PP的黏度比不同引起的。DMA分析表明低模量的弹性体有利于提高共混物的韧性。     

高流动性高韧性PP/POE共混材料研制

用聚烯烃弹性体(POE)代替传统的弹性体,对聚丙烯(PP)增韧改性,探讨了基体树脂、POE、HDPE、滑石粉、纳米CaCO3以及加工助剂EBS的用量对共混体系力学性能和流动性的影响.并通过扫描电镜观察冲击断面,研究共混物的形态结构.结果表明,POE能大幅度的改善材料的冲击韧性,HDPE和POE具有协同增韧效应,加工助剂EBS能改善PP共混材料的流动性,制得的PP改性材料具有高韧性和离流动性,可用于制造汽车装饰件.     

Modified ethylene/α-octene co-polymer elastomer composites with sacrificial bonds crosslinking networks and their reinforced mechanical performance

The low tensile strength of ethylene/α-octene co-polymer (POE) limits its application as high-strength materials. In this study, 3-amino-1,2,4-triazole (ATA) was grafted onto maleic anhydride functionalized POE (PM) by melt reaction to obtain side chains capable of forming hydrogen bonding and metal coordination bonding, and then ferric chloride hexahydrate and POE are blended with them to obtain composite materials with high strength and fracture energy. The introduction of iron-based coordination bonding and hydrogen bonding double dynamic crosslinking network endow thermoplastic elastomers with excellent mechanical strength and high toughness. Fourier transform infrared spectroscopy, rheological tests, and X-ray photoelectron spectroscopy reveal the existence of non-covalent crosslinking networks. Based on the strengthening and toughening of non-covalent dynamic crosslinking network, the tensile strength of the modified POE elastomer composites achieves 12.5 MPa along with the elongation at break of 3540%. In addition, the modified POE elastomer composites exhibit improved melt elasticity and thermal stability.     

PP/POE/WGRT热塑性弹性体的制备及性能研究

采用动态硫化法制备了PP/POE/WGRT共混型热塑性弹性体（TPE）,考察了PP/WGRT共混比、在PP相中填充POE以及动态硫化法对TPE力学性能的影响。结果表明,改变PP/WGRT共混比以及在PP相中填充POE均不能获得TPE;采用动态硫化法制备的PP/POE/WGRT TPE具有较好力学性能,且当DCP用量为3份时TPE力学性能最佳。FE-SEM观察结果表明,动态硫化法使得PP/POE/WGRT TPE的界面作用获得增强,力学性能获得改善。     

高流动性PP／POE／纳米CaCO3复合材料的研制

利用双螺杆挤出机，通过熔融共混工艺制备了聚丙烯(PP)／聚烯烃热塑性弹性体(POE)／纳米CaCO3复合材料。利用扫描电子显微镜(SEM)观察了不同体系的形态，结果显示：纳米CaCO3和POE在PP／POE／nano-CaCO3中互相促进分布及均化。冲击试验结果表明：PP／POE／nano-CaCO3体系的缺口冲击强度较PP／POE、PP／nano-CaCO3和纯PP分别提高了65％，107％和178％。熔体流动速率测试显示：纳米CaCO3在PP／POE／nano-CaCO3中具有提高体系流动性的作用。     

PP/POE/T-ZnOw复合材料流变行为的研究

通过熔融共混的方法在双螺杆挤出机上制备了聚丙烯/乙烯-辛烯共聚物/四针状氧化锌晶须（PP/POE/T-ZnOw）三元复合材料。利用毛细管流变仪分析了纯PP、PP/POE二元共混物和PP/POE/T-ZnOw三元复合材料的流变行为,详细研究了T-ZnOw含量对三元复合材料流变行为的影响。研究结果表明,POE对二元共混物的稠度影响与温度有关,而T-ZnOw含量对三元复合材料的稠度、表观黏度和黏流活化能具有不同的影响。     

Electrically Conductive Silicone/Organic Polymer Composites

Electrically conductive silicone elastomers carbon composites are the current state-of-art for electrically conductive elastomers. The combination of inorganic and organic polymers leads to a highly electrically conductive composite which has improved thermal stability. In this work, composites were formed, from two different classes of room temperature vulcanizing inorganic silicone polymers (vinyl & hydroxyl methyl silicone elastomers) (RTV-SI), which undergo curing by addition and condensation curing respectively, by a mixing and casting method. The organic polymer, which is the camphor sulfonic acid doped polyaniline (Pani.CSA) was synthesized by oxidative polymerization of aniline. By selecting RTV-SI system, the possibility of oxidative interaction of Pani.CSA that takes place at high temperature with curatives (peroxides) is ruled out. This helps to retain the conductivity of Pani.CSA and avoids the curing retardation of rubber. The concentration of Pani.CSA in the composites was varied from 20–40 phr. The electrical, thermal, morphological and short term stress - strain properties of the composites were studied after curing. A sharp decrease was observed in the resistance from ～10?15 Ω for blank silicone rubber to 27–31.5 KΩ for the filled composites with good thermal stability. The homogeneity of the composites was verified from SEM. The hardness of the composites was observed to increase by 3–5 on the Shore A scale. Tensile strength, tear strength and rebound resilience all decreased slightly.