硬质聚氯乙烯管专用树脂

采用电镜分析、反相色谱、毛细管流变仪和布拉本达塑性仪研究了由锦西化工研究院生产的ＰＶＣ管用树脂的颗粒形貌、比表面积、流变性能和加工速率。结果表明，该树脂和疏松型树脂的形貌呈棉桃状不同，外形为球状，比表面积较大，约比普通ＳＧ－５型树脂增加１倍，最高可达１．００７ｍ＾２／ｇ；在从低剪切到高剪切速率范围内，该树脂的表观粘度均比ＳＧ－５型树脂低，不论是采用粒料还是粉料挤出，在聚合度相同时，该树脂的挤出速率     

不饱和聚酯树脂制造新技术

本文简述了最近国外研制的高分子量ＵＰ树脂，低苯乙烯散发性ＵＰ树脂，新型ＳＭＣ用ＵＰ树脂和ＧＭＡ改性的间苯型ＵＰ树脂。     

新型低黏度苯并噁嗪树脂

介绍了1种新型低黏度苯并噁嗪树脂，用旋转黏度计研究了这种树脂的黏度，用DSC和凝胶化时间测试等研究了其固化反应行为，并对树脂浇注体和复合材料进行了力学性能测试。实验结果表明，这种树脂具有良好的工艺性能和较高的力学性能，可作为树脂传递模塑成型RTM的高性能复合材料基体树脂或高性能封装用树脂。     

新一代无卤阻燃聚酯复合材料

新一代无卤阻燃聚酯复合材料１三种重要组份（１）Ｐａｌａｐｒｅｇ树脂，是ＢＡＳＦ公司采用邻苯二甲酸等制备的、以ＰａｌａｐｒｅｇＰ１７－０２树脂为基础，含有低收缩（ＬＳ）、低糙度（ＬＰ）热塑性树脂的高反应性树脂系统，溶于苯乙烯，增稠性能好，粘度低（可提高...     

用于树脂压铸（RTM）的树脂基体研究

文中介绍了ＲＴＭ用树脂体系的研究概况，结果表明树脂体系具有低的粘度，较长的贮存期和良好的反应性能，固化树脂和复合材料的力学性能及耐热性能优良，它能满足ＲＴＭ对基体的要求。     

中国塑料专利

<正>专利名称:树脂成型品、树脂组合物的制造方法,树脂成型品、树脂组合物、低发尘性树脂粉末以及树脂的低发尘化方法申请公布号:CN104144985A申请公布日:2014.11.12本发明涉及树脂成型品、树脂组合物的制造方法,以及树脂成型品、树脂组合物、低发尘性树脂粉末和树脂的低发尘化方法。包括:将流动石蜡添加于热固性树脂而准备低发尘性树脂粉末的工序以及对低发尘性树脂粉末进行加热混炼而得到树脂成型品的     

服装革用低模量湿法树脂的合成

本文介绍了低模量湿式树脂的合成，讨论了影响树脂性能的各种因素，并归纳较思想的产品配方和合成工艺。     

PVC管路系统胶粘剂的制备

国产PVC管路系统胶粘剂存在的初粘强度低。冷热性能差、固化时间长等缺点，主要是由于胶粘剂中基础树脂所致。所以，我们合成了具有一定的柔性和弹性、良好的耐水性和耐候性。且固化速度快的HB树脂。以这种树脂为基础，配合适当的辅助树脂及溶剂，研制出新型的PVC管路系统胶粘剂。我们选用反应平稳、聚合体系粘度低、易控制终点的溶液法聚合方式，合成出聚合度适宜。分子量分布窄的HB树脂。树脂固含30％时，4”杯粘度约305，酸值5～7mgKOH／g。溶剂系统采用对树脂有良好溶解能力，贮存稳定性能好，不产生凝胶，挥发速度适中，施工性良…     

杂混树脂的新进展

聚酯型聚氨醋杂混树脂是热固性聚合物，兼有不饱和聚酯的最佳性能和聚氨酯的技术特点．这些杂混树脂韧性优于聚酯，强度、劲度和耐热性均优于聚氨酯。ＤＳＭ树脂公司已开发出杂混树脂新系列一Ｄａｒｏｕ４０系列，其粘度低，易填充，增韧性好，快速固化，机械性能优异．这些特种树脂的每一种又具有下列一种或两种以上的性能：突出的耐腐蚀性、高的热稳定性，良好的阻燃性、低收缩率或优异的韧性。低粘度、高反应性和独特的物理性能相结合使这些杂混树脂甚适合于生产由液体混合成型的产品．     

新型地坪涂料在上海问世

上海富晨化工利用其低收缩环氧乙烯基树脂的特点，成功地在一大型工程中实现自流平涂装，经工程甲方对照国外知名树脂品牌测试，富晨树脂能较好满足自流平要求和防腐蚀要求。     

Dielectric Constant Characteristics of a New Composite Dielectric Material

Dielectric characteristics of a new composite dielectric material composed of a ceramic and a plastic resin were investigated. The composite material has two requirements: it must display stable characteristics and be adaptable to mass production. The first requirement can be met by using a ceramic material, such as the TiO₂-rich part of the BaO-PbO-Nd₂O₃TiO₂ system. The second requirement can be fulfilled by using a polyoxymethylene resin. The new composite dielectric, composed of a ceramic (40 vol%) and a polyoxymethylene resin (60 vol%) and produced by injection molding, exhibits a dielectric constant of 12.1. It also displays extremely low temperature dependence in a range of −20° to 140°C as well as low frequency dependence over a range from 1 kHz to 10 MHz.     

环氧/石墨复合材料介电性能的研究

通过共混法制备了环氧/石墨复合材料,用SEM表征表面形貌。探讨了石墨填充量对复合材料介电性的影响,制备出一种介电常数达87.3、介电损耗为0.18的高介常低介损绝缘材料,为工业化生产低成本高储能密度电容器提供新思路。     

表面改性对石墨/环氧复合材料介电性能的影响

通过共混法制备了环氧/石墨复合材料,用SEM表征表面形貌,探讨了石墨填充量、石墨表面改性等对复合材料介电性的影响。发现石墨能通过渗流效应提高环氧树脂的常数,表面改性剂对石墨的介电性能有明显影响。制备得到一种介电常数达164、介电损耗为0.14、体积电阻率为1.5×10~10Ω·cm的高介常低介损复合材料,为工业化生产低成本高储能密度电容器提供新思路。     

Dielectric properties of polymer/ceramic composites based on thermosetting polymers

Summary A series of thermosetting polymer/ceramic composites were prepared. Three kinds of thermosetting polymers, i.e. cyanate resin, bismaleimide resin, and epoxy resin, were used as matrixes, and BaTiO₃ particles were as fillers. The dielectric properties of these composites were investigated. Experimental data of the dielectric constants were fitted to several theoretical equations in order to obtain the best-fitting equations of the dielectric constants of these composites. The result indicates that the dielectric constants of composites all increase with the increase of BaTiO₃ content. Using bismaleimide resin and epoxy resin as matrixes, the dielectric losses both increase obviously as the amount of BaTiO₃ particles is increased, but the dielectric loss of cyanate/BaTiO₃ composite decreases. With the increase of the frequency, the variation ranges of the dielectric constant and dielectric loss of cyanate/BaTiO₃ composite are both the smallest. The predications of the effective dielectric constants by Lichterecker mixing rule are in good agreement with experiment data.     

高频低介电常数改性环氧树脂覆铜板的研制

介绍高频印刷电路板基材的介电性能要求和几种典型的覆铜板材的介电性能，以高溴化环氧树脂（EP），酚醛EP，改性聚苯醚（MPP），酸酐固化剂，咪唑促进剂配制胶粘剂体系，经偶联剂处理的E型无碱玻璃布为增强材料，采用通用上胶与压制工艺，研制了一种适用于高频电路条件下的介电性能优异，成本低的高频覆铜板。     

Mechanical and dielectric properties of cured 1,2‐bis(vinylphenyl)ethane resin modified with poly(phenylene oxide)

1,2‐Bis(vinylphenyl)ethane (BVPE) could be cured without curing agents at relatively low temperatures (～ 180°) in a nitrogen atmosphere. Cured BVPE (CBVPE) resin showed exceptionally low dielectric constant (? = 2.50 at 10 GHz) and low dielectric loss tangent (tan δ = 0.0012 at 10 GHz), and had excellent thermal resistance. Its 5 wt % weight‐loss temperature was 425°C in a nitrogen atmosphere and glass transition temperature was over 400°C. Poly(phenylene oxide) (PPO) was used to improve the toughness of CBVPE resin. PPO was an effective modifier to toughen CBVPE resin: when using 30 wt % of the modifier, the tensile strength and elongation of the modified CBVPE resin were 75 MPa and 26%, respectively. The modified CBVPE resin also showed excellent dielectric properties (? = 2.45 at 10 GHz, tan δ = 0.0015 at 10 GHz). © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1252–1258, 2004     

Review of polymer materials with low dielectric constant

One of the exciting and promising developments in material science today is the design and synthesis of novel low‐dielectric‐constant polymer materials, which are found to have potential applications in the field of ultralarge‐scale integration, capacitors and other electronic circuits as insulating and/or dielectric materials. In this article the new polymer dielectric materials reported in recent years are reviewed, including aromatic (heteroaromatic) polymers, silicon‐containing polymers, fluorinated polymers, porous polymers, etc. In summarizing the review, the development, potential applications and future directions of polymer materials with low dielectric constant are discussed. Copyright © 2010 Society of Chemical Industry     

活性稀释剂种类对环氧树脂体系性能的影响研究

采用丁基缩水甘油醚(660)、乙二醇二缩水甘油醚(669)和苯基缩水甘油醚(690)三种活性稀释剂对环氧树脂/甲基四氢邻苯二甲酸酐(MeTHPA)固化体系进行改性,研究了稀释剂对树脂胶液粘度及其固化物力学性能和电性能的影响。结果表明,当加入669和690稀释剂后,体系的介电性能基本不变,耐电弧性能提高,而660的加入会降低体系的介质损耗,对耐电弧性能影响很小。其中,当690的添加量为3%时,耐电弧达到94s,比纯树脂提高了22%;当添加量为3%～12%时,树脂固化物的拉伸强度稳定在45～55MPa之间。     

Thermal and dielectric properties of the aluminum particle/epoxy resin composites

Microsized aluminum/epoxy resin composites were prepared, and the thermal and dielectric properties of the composites were investigated in terms of composition, aluminum particle sizes, frequency, and temperature. The results showed that the introduction of aluminum particles to the composites hardly influenced the thermal stability behavior, and decreased T_g of the epoxy resin; moreover, the size, concentration, and surface modification of aluminum particles had an effect on their thermal conductivity and dielectric properties. The dielectric permittivity increased smoothly with a rise of aluminum particle content, as well as with a decrease in frequency at high loading with aluminum particles. While the dissipation factor value increased slightly with an increase in frequency, it still remained at a low level. The dielectric permittivity and loss increased with temperature, owing to the segmental mobility of the polymer molecules. We found that the aluminum/epoxy composite containing 48 vol % aluminum‐particle content possessed a high thermal conductivity and a high dielectric permittivity, but a low loss factor, a low electric conductivity, and a higher breakdown voltage. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Deep eutectic solvent inclusions for high-k composite dielectric elastomers

Recent advances in novel electroactive devices have placed new requirements on material development. High-performance dielectric elastomers with good mechanical stretchability and high dielectric constant are under high demand. However, the current strategy for fabricating these materials suffers from high cost or low thermal stability, which greatly hinders large-scale industrial production. Herein, we have successfully developed a novel strategy for improving the dielectric constant of polymeric elastomers via deep eutectic solvent inclusion by taking advantage of the low cost, convenient and environmentally benign synthesis process and high ionic conductivity from deep eutectic solvents. The as-prepared composite elastomers showed good stretchability and a greatly enhanced dielectric constant with a negligible increase in dielectric dissipation. Moreover, we have proven the universality of our strategy by using different types of deep eutectic solvents. It is believed that low-cost, easy-synthesis and environmentally friendly deep eutectic solvents including composite elastomers are highly suitable for large-scale industrial production and can greatly broaden the application fields of dielectric elastomers.