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四针状氧化锌晶须填充改性聚丙烯研究 总被引:1,自引:0,他引:1
以乙烯-辛烯共聚物接枝甲基丙烯酸缩水甘油酯(POE-g-GMA)为增容剂,利用熔融共混法制备了聚丙烯(PP)/POE-g-GMA/四针状氧化锌晶须(T-ZnOw)复合材料,借助于SEM、DSC和其他测试手段对复合材料的结构和性能进行了考查。DSC测试结果表明:T-ZnOw对PP基体的结晶有一定的诱导作用,使体系出现了双熔融峰和双结晶峰,但对PP的结晶能力和结晶度影响不大。力学性能测试结果表明:在POE-g-GMA的协同作用下,T-ZnOw对PP基体有较强的增韧作用,但增强作用不明显。 相似文献
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四针状氧化锌晶须的制备 总被引:5,自引:0,他引:5
用锌粉氧化的方法,通过控制反应器内的气相过饱和度,可以获得不同尺度的四针状氧化锌晶须(T-ZnOW)。合成出的ZnO的晶须纯度高,晶体结构完整,晶须尺度可控(针长为10-60μm,根部尺寸约为1-6μm)。晶须的生长机理为气-固(VS)机理。 相似文献
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ZnO晶须用作泡沫硅橡胶增强体应用研究 总被引:5,自引:0,他引:5
本文叙述了ZnO晶须在泡沫硅橡胶研制过程中作为增强剂,并在实验基础上研究了ZnO晶须的添加量,表面预处理和蔼对其补强效果的影响,初步搪塞了其微观补强机理。 相似文献
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Hongwei Cui Qian Jing Dongwei Li Tingting Zhuang Yixing Gao Xianghai Ran 《应用聚合物科学杂志》2023,140(1):e53262
Rubber damping materials have important applications in modern industrial systems. However, their damping temperature range is low, which is not suitable for the damping demand under high temperature conditions. At present, there is very little research on the damping performance of rubber under high temperature conditions. Silicone rubber has excellent high temperature resistance but poor damping in its application temperature range. In this study, a boron-terminated polysiloxane (PBS) was prepared by modifying hydroxy-terminated polydimethylsiloxane (PDMS-OH) with boric acid (BA). The molecular structure of PBS was confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC) analysis. Rheology measurements revealed that PBS was a “shear hardening” material. Then, the silicone rubber was modified with PBS. With the introduction of boron atoms, boron and oxygen dative bonds with dynamic properties could be formed inside the silicone rubber, which played an energy dissipation role in the process of association/dissociation. Dynamic mechanical analysis (DMA) showed that the loss factor (tan δ) of modified silicone rubber was greater than 0.3 in the temperature range of 81.5°C–250°C, which was higher than the loss temperature range of conventional damping rubber. The cyclic stress–strain test also showed that the modified silicone rubber still had high dissipation coefficient (DE) at high temperature. Therefore, the PBS-modified silicone rubber prepared by this method achieved excellent damping performance under high temperature conditions. 相似文献
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Zhengtao Su 《应用聚合物科学杂志》1999,73(13):2779-2781
The thermal stability of high-temperature vulcanized silicone rubber with stannic oxide as a heat stabilizer was investigated by heat aging at 300°C × 24 h in air. It was discovered that Sn+4 is reduced to Sn0 during vulcanization and during heat aging in air by X-ray photoelectron spectroscopy (XPS). © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2779–2781, 1999 相似文献
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The wear resistance of zinc oxide whisker (ZnOw)/natural rubber‐styrene butadiene rubber‐butyl rubber (NR‐SBR‐BR) composites showed that a tetra‐needle like ZnOw, which is treated by a coupling agent, improved the wear resistance of the rubber composites. The topography of the worn surfaces of the ZnOw/NR‐SBR‐BR composites was fractal, and the fractal dimension and abrasion loss decreased synchronously as the ZnOw content increased in the composites. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 667–670, 2003 相似文献
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Pei Dai Yang Jiao Huiling Ma Xinmiao Zeng Yongjun Lu Liancai Wang Mao Bao Maolin Zhai 《应用聚合物科学杂志》2019,136(29):47776
Functionalized graphene oxide (named GO-Si) was synthesized with graphene oxide and triethoxyvinylsilane (TEVS) using tetrahydrofuran solution by γ-ray irradiation. TEVS was successfully covered onto GO sheets, and the polysilane content on GO-Si was increased upon increasing the absorbed dose. The structures of GO-Si were verified by atomic force microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The resultant GO-Si was dispersed into α,ω-dihydroxypolydimethylsiloxane to prepare room temperature vulcanized silicone rubber composites (named SR/GO-Si) by solution casting. The dispersion of GO-Si was more uniform than that of GO. Compared to that of pure SR, the thermal conductivity of SR/GO-Si-1.95 composites was increased 1.5-fold, and its tensile strength and elongation at break increased 78.6 and 71.4%, respectively. It was expected that SR/GO-Si would have potential application as the thermal interface material. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47776. 相似文献