宽温域高阻尼橡胶材料研究进展

文中介绍了宽温域高阻尼橡胶材料的作用机理、性能指标及其发展概况。阻尼橡胶的主要性能指标为损耗因子tanδ、玻璃化转变温度Tg、阻尼峰半高宽温度△0．7；影响阻尼橡胶性能的最主要因素是橡胶的分子结构，其次为填充体系、硫化体系。该文最后介绍了阻尼橡胶的改性方法：共混法、互穿网络法、填充法等。     

高分子阻尼材料及阻尼结构

介绍了高分子阻尼材料及阻尼结构技术的研究进展情况,涉及聚合物阻尼机理,新型阻尼材料研究开发,各式阻尼结构及特点,并着重介绍了复合阻尼结构,对其中一些进行了工作机理分析。     

阻尼乳胶涂料

以苯乙烯－丙烯腈共聚物为“核”,丙烯酸正丁酯－丙烯酸乙酯共聚物为“壳”,合成了具有互穿聚合物网络结构的乳胶,测定了该乳胶配制的涂料性能及其在阻尼领域的实际应用效果。     

互穿聚合物网络阻尼材料研究进展

介绍了互穿聚合物网络阻尼材料的研究进展，讨论了对其阻尼性能的评价以及组分、组分间的相容性、交联密度、无机填料等影响性能的因素，并展望了互穿聚合物网络的研究前景。     

国内互穿网络结构阻尼涂料的研究进展

在总结了国内聚合物基阻尼涂料的研究基础上,详细综述了互穿网络(IPN)结构、乳液互穿网络(LIPN)结构聚合物基阻尼涂料的种类及研究现状,并展望了聚合物基阻尼涂料研究的发展趋势和前景。     

阻尼橡胶

阻尼（damping）的物理意义是力的衰减，或物体在运动中的能量耗散。当物体受到外力作用而振动时，会产生一种使外力衰减的反力，称为阻尼力（或减震力）。它和作用力的比被称为阻尼系数。通常阻尼力的方向总是和运动的速度方向相反。因此，材料的阻尼系数越大，意味着其减震效果或阻尼效果越好。     

互穿聚合物网络阻尼材料

综述了近年来国内外有关阻尼材料的研究成果,提出互穿聚合物网络（ＩＰＮ）作为一种阻尼材料,具有其他类型高分子材料不能比拟的优势,同时展望了ＩＰＮ阻尼材料的研究前景。     

聚氨酯阻尼材料研究进展

对聚氨酯阻尼材料的阻尼原理、成型方法、性能评价、影响其阻尼性能的关键因素、材料用途等方面作了综述,展望了其应用前景。     

互穿聚合物网络阻尼性能的评价

从聚合物相容性及形态结构，单体结构和单体配比等几方面对互穿聚合物网络（ＩＰＮ）阻尼性能的影响进行了讨论。在此基础上提出一种简便和定量的评价ＩＰＮ阻尼性能的方法：△ＬＰ＝１０ｌｏｇ（Ｑ／４πｒ＾２＋４／Ｒ１）／（Ｑ／４π／Ｒ２）；并指出ＩＰＮ阻尼材料的有效ｔａｎδ下限为０．３。     

聚氨酯阻尼材料的研究进展

介绍了聚合物的阻尼机理和阻尼结构,综述了采用不同方法[如物理共混、化学共聚、互穿聚合物网络(IPN)和阻尼结构设计等]对PU(聚氨酯)阻尼材料进行改性的研究进展。最后对PU阻尼材料的发展方向进行了展望。     

Influence of the process on phase separation induced by radical copolymerization of styrene and divinylbenzene in the presence of reactive polyurethane network precursors

Interpenetrating polymer systems based on crosslinked polyurethane (PU) and polystyrene (PS) were prepared at room temperature by a one‐shot (in situ) method, starting from an initial homogeneous mixture of reagents via noninterfering mechanisms. Both polymerizations were performed either simultaneously or one after the other. True simultaneity at every stages of the process is not possible. Despite the difference in refractive index of the components, hazy or optically clear films were obtained, thus indicating various levels of phase separation, also confirmed by glass transition temperature (T_g) measurements. The results suggest that controlling the chemistry and process (crosslink density, composition, and time sequence of events) of in situ interpenetrating network formation will give various morphologies, and hence properties, ranging from microphase separated materials to larger macrophase separated materials. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci, 2006     

The effect of composition and the level of crosslinking of the poly(methylmethacrylate) phase on the properties of natural rubber‐poly(methylmethacrylate) semi‐2 interpenetrating polymer networks

The effects of the PMMA content and the cross‐linker level in the poly(methylmethacrylate) component on the dynamic and physico‐mechanical properties of semi‐2 interpenetrating polymer networks based on natural rubber and poly(methylmethacrylate) were determined. The miscibility of the components in these semi‐2 interpenetrating polymer networks was determined using the loss tangent data, obtained from dynamic mechanical thermal analysis and the interphase contents were calculated from modulated scanning calorimetric data. Some component mixing in these semi‐2 interpenetrating polymer networks was evident from these modulated differential scanning calorimetric and dynamic mechanical thermal analysis data. The degree of component mixing increased with cross‐linker level in the PMMA phase. The PMMA content in the semi‐2 IPNs has a significant effect on the tensile and hysteresis behavior of these semi‐2 interpenetrating polymer networks. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Electrochemical behavior of an interpenetrating polymer network hydrogel composed of poly(propylene glycol) and poly(acrylic acid)

An interpenetrating polymer network (IPN) hydrogel based on poly(propylene glycol) and poly(acrylic acid) was prepared by UV irradiation. The swelling behavior of the IPN hydrogel was studied by the immersion of the gel in aqueous NaCl solutions of various concentrations. The swelling ratio decreased with an increase in the NaCl concentration. The electrically sensitive behavior of the IPN hydrogel in electric fields was also investigated. The IPN hydrogel also showed a stepwise bending behavior that depended on the electric stimulus. The bending angle and bending speed of the IPN hydrogel were greatest in 0.6 wt % aqueous NaCl and increased with an increase in the applied voltage. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2301–2305, 2003     

Sorption characterization of poly(vinyl alcohol)/chitosan interpenetrating polymer network hydrogels

Poly(vinyl alcohol) (PVA)/chitosan interpenetrating polymer networks (IPN) were prepared by UV irradiation. The water sorption behavior of the IPNs was measured at various temperatures and humidity levels. The water uptake of IPN13 is greater than that of other IPNs. Vapor sorption behavior is more affected by the density of water vapor than by hydrophilic properties with increasing temperature. Equilibrium water uptake increases as humidity increases, and the increase is more noticeable at high humidity. The sorption system of all IPNs is a relaxation‐controlled mechanism at a relative humidity (RH) of 90%, but it is a Fickian diffusion‐controlled mechanism when the RH is below 50%. With an increase in humidity, the diffusion coefficients were found to increase due to greater penetration of water into the IPNs. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 86–90, 2003     

聚氨酯/聚甲基丙烯酸甲酯互穿网络的阻尼性能及相态

引言聚合物互穿网络体系由于在其形成过程中产生特殊的物理拓扑结构,使得该体系是一种永久缠结在一起的聚合物"合金"[1]。同时,由于构成该体系的聚合物组分往往不相容或部分相容,在其形成     

阻尼硅橡胶的研究现状

总结了阻尼硅橡胶的特点及制备阻尼硅橡胶的方法。     

Morphology and thermal and dielectric behavior of cycloaliphatic epoxy/trimethacrylate interpenetrating polymer networks for vacuum‐pressure‐impregnation electrical insulation

Vacuum pressure impregnation has been known as the most advanced impregnation technology that has ever been developed for large and medium high‐voltage electric machines and apparatuses. We developed one new type of vacuum‐pressure‐impregnation resin with excellent properties by means of a novel approach based on in situ sequential interpenetrating polymer networks resulting from the curing of trimethacrylate monomer [trimethylol‐1,1,1‐propane trimethacrylate (TMPTMA)] and cycloaliphatic epoxy resin (CER). In this study, the influence of the concentrations of the components and their microstructures on their thermal and dielectric behaviors were investigated for the cured CER/TMPTMA systems via atomic force microscopy, dynamic mechanical analysis, thermogravimetric analysis, and dielectric analysis. The investigation results show that the addition of TMPTMA to the CER–anhydride system resulted in the formation of a uniform and compact microstructure in the cured epoxy system. This led the cured CER/TMPTMA systems to show much higher moduli in comparison with the pure CER–anhydride system. The thermogravimetric analysis results show that there existed a decreasing tendency in the maximum thermal decomposition rates of the cured CER/TMPTMA systems, which implies that the thermal stability properties improved to some extent. The dielectric analysis results show that the cured CER/TMPTMA systems displayed quite different dielectric behaviors in the wide frequency range 0.01 Hz–1 MHz and in the wide temperature range 27–250°C compared with the cured CER–anhydride system. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

A novel approach to interpenetrating networks of epoxy resin and polydimethylsiloxane

A novel methodology for preparing interpenetrating polymer networks (IPNs) between an epoxy resin, diglycidylether of bisphenol A (DGEBA) and polydimethylsiloxane (PDMS) was proposed. The vinyl‐terminated PDMS (vinyl‐PDMS) was partially crosslinked with hydrogen‐containing PDMS (H‐PDMS) and was mixed with DGEBA, modified silica (m‐silica), and a methyl tetrahydrophtalic anhydride (MTHPA) curing agent. Subsequently, the curing reactions of the DGEBA/m‐silica and PDMS were allowed to occur separately and simultaneously leading to an IPN. The m‐silica played a double‐fold role: Cocuring with DGEBA and H‐bonding with the oxygen atoms on the PDMS segments, and thus acted as a compatibilizer between DGEBA and PDMS and promoted the generation of the IPN structure. The resulted partially miscible structure was characterized through the dispersion of silica particles and the glass transition behavior of the samples. The mechanical properties of the IPNs were also investigated. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

阻尼剂提高硅橡胶阻尼性能的研究

采用阻尼剂提高硅橡胶阻尼性能,研究了不同阻尼剂对硅橡胶性能的影响。结果表明,阻尼剂DA—1和DA—3均可有效提高硅橡胶阻尼系数。采用阻尼剂DA—1/DA—3配比为15/5时,硅橡胶阻尼性能最优,综合性能最好。