硅橡胶/有机橡胶共混改性的研究进展

综述了近年来硅橡胶与三元乙丙橡胶、氟橡胶、橡胶型乙烯-乙酸乙烯酯、丙烯酸酯、聚氨酯等有机橡胶共混改性的最新研究与应用状况.介绍了硅橡胶/有机橡胶共混改性材料的发展动向.     

丙烯酸酯橡胶的共混改性

介绍了不同型号的丙烯酸酯橡胶（ACM）之间以及ACM与NBR、氯醚橡胶、硅橡胶和氟橡胶共混改性对胶料各项性能的影响,指出通过共混改性可使ACM胶料的拉伸强度、扯断伸长率等物理性能以及耐热性、耐寒性、耐油性等得到不同程度的改善;同时还指出了不同共混胶料在加工方面应注意的问题以及其适用领域。     

聚烯烃弹性体对硅橡胶的共混改性

研究了硅橡胶／聚烯烃弹性体(POE)共混物的物理机械性能和相形态。结果表明，硅橡胶／POE共混物为两相结构，POE的加入能有效地提高硅橡胶的物理机械性能。     

混炼型PU/硅橡胶共混物性能的研究

采用机械共混的方法，研究了混炼型PU同硅橡胶按不同比例共混后的物理机械性能及耐热性能。结果表明，在混炼型聚氨酯中加入少量硅橡胶，可提高聚氨酯橡胶的拉伸强度及拉断伸长率，并能显著改善聚氨酯橡胶的耐热性。     

聚氨酯橡胶改性硅橡胶的性能研究

研究了聚氨酯橡胶(PUR)/甲基乙烯基硅橡胶共混体系的力学性能、热稳定性及硫化特性,结果表明,随着PUR质量分数的增加,共混胶的耐热性能下降,正硫化时间延长,硫化速度减慢,焦烧期基本无变化,交联密度降低;SEM结果显示,共混胶在形态上形成了海-岛结构,随着PUR质量分数的增加,PUR有变为连续相的趋势,相界面结合较好,机械的挤压和剪切作用强迫两相互容;随着PUR质量分数的增加,共混胶的拉伸强度先下降后上升;断裂伸长率则是先迅速提高接着又缓慢下降。PUR质量分数为80%时,共混胶的综合力学性能较佳。     

聚氨酯弹性体／橡胶共混改性的研究

本文采用丁苯橡胶和三元乙丙橡胶对热塑性聚氨酯弹性体进行共混改性,经过对共混体系的结晶行为和力学性能分析,得出共混体系的模型假设,为扩大聚氨醋弹性体的应用范围提供了一定的理论依据。     

橡胶改性PP共混体系的研究

本文研究了SBR／PP共混比、硫化体系、不同橡胶以及增容剂对橡胶／PP共混物力学性能的影响。试验得出：橡塑比（SBR／PP）在30／70,采用半有效硫化体系（CZ／S）时,所制得共混物力学性能较好,共混体系PP／POE的综合性能比PP／EPDM、PP／SBR、PP／NBR共混体系要好,加入增容剂PP－g－MAH可以显著提高共混物的力学性能。     

硅橡胶的改性研究

综述了近年来硅橡胶的改性研究,主要阐述了硅橡胶和其他橡胶共混改性,纳米SiOx改性室温硫化硅橡胶和矿物微粉增强硅橡胶性能。     

硅橡胶并用改性研究进展

介绍了国内外硅橡胶与三元乙丙橡胶、丙烯酸酯橡胶、氟橡胶、聚氨酯橡胶、二烯类橡胶、丁基橡胶等并用的研究情况和各种并用胶的优缺点。指出硅橡胶与其他橡胶并用的关键问题是相容性和共硫化特性。     

医用硅橡胶亲水改性研究进展

硅橡胶材料在生物医学领域有着广泛的应用,但其结构组成决定了材料本身具有弱极性和疏水性,导致其与机体相容性差,因而需要提升硅橡胶的亲水性能.从表面和本体改性两大方面综述了提升医用硅橡胶亲水性能的改性方法,分析比较各种改性方式的优缺点,并对未来医用硅橡胶的发展方向进行了展望.     

室温硫化硅橡胶的增强改性研究进展

概述了室温硫化硅橡胶的类型、硫化机理、性能及其在宇航领域的应用,综述了室温硫化硅橡胶的增强及改性研究进展,并提出了今后室温硫化硅橡胶的主要研究方向。     

Effect of surface modification of silicon carbide nanoparticles on the properties of nanocomposites based on epoxidized natural rubber/natural rubber blends

Improvement of the properties of rubber nanocomposites is a challenge for the rubber industry because of the need for higher performance materials. Addition of a nanometer‐sized filler such as silicon carbide (SiC) to enhance the mechanical properties of rubber nanocomposites has rarely been attempted. The main problem associated with using SiC nanoparticles as a reinforcing natural rubber (NR) filler compound is poor dispersion of SiC in the NR matrix because of their incompatibility. To solve this problem, rubber nanocomposites were prepared with SiC that had undergone surface modification with azobisisobutyronitrile (AIBN) and used as a filler in blends of epoxidized natural rubber (ENR) and natural rubber. The effect of surface modification and ENR content on the curing characteristics, dynamic mechanical properties, morphology and heat buildup of the blends were investigated. The results showed that modification of SiC with AIBN resulted in successful bonding to the surface of SiC. It was found that modified SiC nanoparticles were well dispersed in the ENR/NR matrix, leading to good filler‐rubber interaction and improved compatibility between the rubber and filler in comparison with unmodified SiC. The mechanical properties and heat buildup when modified SiC was used as filled in ENR/NR blends were improved. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45289.     

淀粉改性及其在橡胶中的应用研究进展

石化能源的短缺和环境污染等问题的日益严重,使得时天然可再生资源的研究成为当前的研究热点。淀粉作为一种广泛存在的天然资源,在高分子材料方面越来越受到青睐。本文介绍了淀粉的结构特点,综述了淀粉的物理改性以及化学改性中的交联改性、接枝改性和小分子改性的研究进展,并在此基础上介绍了淀粉在橡胶工业中的应用研究进展。     

Effect of organic modification on structure and properties of room‐temperature vulcanized silicone rubber/montmorillonite nanocomposites

The aim of this work was to study the effect of different organomontmorillonite on the structure and properties of room‐temperature vulcanized silicone rubber (RTV) composites. Quaternary ammonium salts (QAS) and hyperbranched QAS were used as intercalation agents to treat Na⁺‐montmorillonite and formed two kinds of organomontmorillonite, OMMT and HOMMT. OMMT/RTV and HOMMT/RTV composites were prepared using these organomodified silicate layers. Properties such as tensile strength, elongation at break, swelling behavior, and thermal stability were researched and compared. The addition of OMMT and HOMMT improved the mechanical properties of RTV composites. The composites with 3 mass % HOMMT showed the highest tensile strength and elongation at break, 5.4 MPa and 425%, which was 29 and 97% higher than that of pure RTV. The RTV composites exhibited excellent thermal stability and swelling behavior. At loading of 3 mass % of HOMMT, T_onset, and T_max was 452 and 640°C, respectively, 33 and 150°C higher than that of pure RTV. A combination of X‐ray diffraction (XRD) test, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) studies was used to characterize the structure and reinforcing mechanism of these clays. The diffraction peaks in XRD curves were almost absent in the scattering curve of RTV/HOMMT (3 mass %). This was due to the possibility of having exfoliated silicate layers dispersed in the polymer matrix. A careful observation of an area of platelet tactoid of 3% HOMMT filled composite in SEM and TEM revealed the uniform dispersion of the silicate layers in the composites. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

丁苯橡胶接枝改性的研究进展及应用

介绍了丁苯橡胶接枝改性的机理,综述了近几年来丁苯橡胶接枝改性方法的研究进展。同时,对丁苯橡胶接枝产物的应用及其前景作简要展望。     

超细粉碎硅灰石的表面改性及在橡胶中的应用

由粒度、SEM和长径比分析得出"气流磨"是硅灰石超细粉碎的最佳设备.通过对超细硅灰石粉体的表面化学改性效果的研究,确定了最佳工艺条件:改性剂为硬脂酸,改性剂用量2%,改性时间15～20min,改性温度70℃.并探讨了超细改性硅灰石在橡胶中的应用.