胶乳型互穿网络聚合物的研究

综述了胶乳型互穿网络聚合物的研究,着重介绍了合成工,乳胶粒形态结构的影响因素,同时亦对胶乳型互穿网络聚合物的性能作了介绍。     

胶乳型互穿聚合物网络

本文概述了胶乳型互穿聚合物网络(LIPN)的概念及制法,形态结构的基本特点,研究方法及影响因素;玻璃化转变行为、物理及力学性能;并对其应用进行了简要介绍。     

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。     

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。     

胶乳型互穿网络制备高性能MBS树脂

采用胶乳型互穿网络制备出了性能优异的MBS树脂,产品在亚微观形态上具有完美的核一壳结构,并与PVC具有极好的相容性,比较于传动方法制备的MBS树脂,制品的冲击性能和光学性能得到明显改善。     

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。     

丙烯酸酯在互穿聚合物网络中的应用

概述了多种（甲基）丙烯酸酯做为主要原料，在互穿聚合物网络技术开发中的应用情况。预计将会有良好而深远的发展前景。     

国外胶乳型互穿聚合物网络研究进展

综述了国外胶乳型互穿聚合物网络的基础理论及应用研究现状，并对其发展进行了展望．     

丙烯酸酯互穿网络聚合物的合成和性能

以十二烷基硫酸钠为乳化剂、丙烯酸乙酯为软单体、苯乙烯为硬单体 ,二乙烯基苯或三乙二醇二丙烯酸酯为交联剂 ,先以两步法合成软单体聚合物网络 ,随后加入硬单体溶胀并聚合。研究了软硬单体配比、交联剂和聚合条件对乳液聚合稳定性、放置稳定性和转化率等的影响 ,测定了互穿聚合物网络的 Tg和形态结构、加工和性能。结果表明 ,这种互穿聚合物网络为可以反复可塑加工、并具较高力学性能新型热塑性弹性体     

互穿聚合物网络阻尼材料研究进展

综述了互穿聚合物网络(IPN)阻尼材料的阻尼理论,阻尼性能的评价方法;对IPN阻尼材料的制备和应用进行了评述,并展望了高性能IPN阻尼材料发展趋势和应用前景。     

PMMA/P(BA-co-AA)界面交联LIPN阻尼材料的研究

用种子乳液聚合法合成了PMMA／P（BA－co-AA)界面交联乳胶互穿聚合物网络材料。动态力学谱结果表明，界面交联能提高乳胶互穿聚合物网络的高温阻尼性能；拉伸实验结果表明，界面交联提高了乳胶互穿聚合物网络的抗拉强度和断裂伸长率。     

氟树脂/聚丙烯酸酯胶乳型互穿网络的合成

采用原位聚合和互穿网络的方法,以氟树脂乳液作种子乳液,氟碳乳化剂和碳氢乳化剂为复配乳化剂,合成了聚丙烯酸酯和氟树脂胶乳型互穿网络聚合物(LIPN),所合成的乳液稳定性良好。通过对聚合物的微观形态、动态机械力学性能和接触角的分析,表明用此方法乳液聚合,可以较好地改善两种树脂的相容性,聚合物的表面能有了较大的下降。     

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。     

Correlation between mechanical damping and interphase content in interpenetrating polymer networks

Recently, some interpenetrating polymer networks with good mechanical damping properties have been synthesized. However, the effect of morphology on this property has not yet been clearly elucidated. Herein, two polystyrene–polyurethane interpenetrating polymer networks, which were grafted using TMI [benzene‐1‐(1‐isocyanato‐1‐methyl ethyl)‐3‐(1‐methylenyl)] and HEMA (2‐hydroxyethyl methacrylate), respectively, have been investigated, as model samples, by modulated‐temperature differential scanning calorimetry and by dynamical mechanical thermal analysis. The results indicate that there is a correlation between mechanical damping and both interphase content and the distribution of composition in the interphase region. The findings should provide valuable information for the design of future damping materials. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2439–2442, 2001     

具有良好阻尼性能的蓖麻油互穿网络弹性体

由蓖麻油、甲苯二异氰酸酯(TDI)、单端羟基(甲基)丙烯酸酯预聚物及/或(甲基)丙烯酸酯单体出发,在二丁基二月桂酸锡及氧化还原引发剂存在下合成了四种接枝型互穿网络聚合物(IPN)。研究了产物的力学性能及动态力学性质。结果表明,某些接枝IPN,例如蓖麻油/TDI/单端羟基甲基丙烯酸丁酯预聚物/单端羟基丙烯酸丁酯预聚物组成的IPN,蓖麻油/TDI/丙烯酸丁酯单体/单端羟基甲基丙烯酸乙酯预聚物组成的IPN及蓖麻油/TDI/甲基丙烯酸乙酯单体/单端羟基甲基丙烯酯丁酯预聚物组成的IPN均呈现突出的阻尼行为,tanδ>0.3的温度范围很广,而且最大的tanδ大于1.1。这些IPN呈现良好的橡胶样力学性能。     

EA/St-AN互穿聚合物网络的加工和力学性能

以丙烯酸乙酯为软单体 ,苯乙烯和丙烯腈为硬单体 ,二乙烯基苯或三乙二醇双丙烯酸酯为交联剂 ,采用多步种子乳液聚合技术制备了半互穿和全互穿聚合物网络 ,研究了软、硬单体配比 ,交联剂用量 ,加工次数对共聚物流变行为、力学性能和结构形态的影响。结果表明 ,制备的半互穿和全互穿聚合物网络均可在适宜的条件下流动成型。如果配方选择适当 ,反复加工后力学性能基本不变     

Structure and damping properties of polydimethylsiloxane and polymethacrylate sequential interpenetrating polymer networks

By using the technology of the sequential interpenetrating polymer network, a series of novel damping materials based on a polydimethylsiloxane (PDMS)/polyacrylate (PAC) matrix with polymethacrylate (PMAC) were synthesized. They have a controllable broad transition peak spanning the temperature range of 150–220°C and the medial value of loss factor with maximum of 0.35–0.60. Dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and atomic force microscopy (AFM) were applied to analyze and characterize the transition behavior and the microphase structure of the materials. It was found that the size and height of a transition peak at both the low‐ and the high‐temperature zones change as a function not only of the concentration of PMAC and PDMS but also of the kind of PMAC; simultaneously, the low‐ temperature behavior was also governed by the crystallization of PDMS. The content of the crosslinking agent exerts a significant influence on the configuration of the curves of the transition peaks. AFM shows a characteristic phase morphology of double‐phase continuity containing a transition layer and domain less than 1 μm, indicating that the interwoven multilayer networks are the key to incorporation of the immiscible components and form a broad damping functional region. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 545–551, 2002     

Morphology development in polychloroprene–polystyrene latex interpenetrating polymer networks

Latex interpenetrating polymer networks (LIPNs) have been prepared using a crosslinked polychloroprene latex as the seed emulsion, followed by the in situ polymerization of styrene, typically with a 10% divinyl benzene crosslinker. Polychloroprene–crosslinked polystyrene (XPS) ratios ranging from 70/30 to 40/60 were used, with the second monomer being added as a single aliquot rather than by “starvation” routes. The majority of the work has been conducted using the water‐soluble persulfate initiator method, which entails lengthy (∼ 6 h) polymerizations. To follow the development of microstructure, polymerizations were also stopped at 0.5, 1, and thence hourly intervals up to 6 h, so that any effect of time on shell and domains could be seen by transmission electron microscopy (TEM). Parallel studies using azo‐bis(isobutyronitrile) (AIBN) as initiator at the same temperature were conducted. Products were also studied, after staining, by TEM. For the persulfate initiator, domain structures predominated for the 70/30 ratio, but polystyrene‐rich shells are found in all cases, with increasing thickness as the chloroprene/styrene ratio was reduced. The styrene‐rich products (i.e., 40/60 Neoprene/XPS ratio) appear to have larger unstained domains suggesting phase separation. For the AIBN‐initiated styrene polymerization, shells are less evident, and where they exist, are both thinner and less continuously developed. Domain sizes are somewhat larger. This relatively hydrophobic initiator has caused polymerization predominately in the interior of each latex particle. The particle size distribution of the seed neoprene latex is broad and bimodal. As the LIPNs form, the larger diameter component increases and little evidence for fresh nucleation, in the form of small diameter particles, is seen. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 629–638, 1999