环氧乙烯基酯树脂在复合材料工业中的应用

本文介绍使用环氧乙烯基酯树脂制作高性能ＦＲＰ设备，重点在结构与性能的关系及表现，以利于指导选择材料，同时以腐蚀与结构应用的实例来阐明ＤＥＲＡＫＡＮＥ树脂的成功应用，另外，低苯乙烯含量树脂改善了操作和性能，其最新进展也略和介绍。     

EVA型热熔胶的材料与性能

本文介绍了共聚物ＥＶＡ树脂结构，ＥＶＡ树脂，增粘剂及其它调解剂配比对热熔胶性能的影响。     

EVA在通用聚合物共混改性中的应用

ＥＶＡ具有优良的性能，与通用聚合物进行共混改性，可提高聚合物的性能。本文介绍了几种ＥＶＡ改性树脂及其机械加工法。     

粘合性树脂加工工艺性能的研究

采用哈克扭矩流仪研究了几种粘合性树脂的流变性能，并与国外样品ＣＸＡ３０９５，ＥＡＡ进行了对比，考察了复合膜结构为ＬＤＰＥ（ＬＬＤＰＥ）／粘合性树脂／ＰＡ组合的粘度匹配性，采用平板硫化机讨论了温度，时间对粘合性树脂粘合强度的影响。     

EVA薄膜的主要性能及EVA—PE三层复合功能性宽幅棚膜

本文介绍了用北京有机化工厂提供的ＥＶＡ树脂吹塑成型薄膜的试验结果，阐述了ＥＶＡ吹塑薄膜的工艺性能及其力学、耐老化、保温、无滴性能和采用共挤出复合吹塑成型先进技术并添加各种功能助剂开发生产的ＥＶＡ－ＰＥ三层复合功能性棚膜的主要性能及应用效果。     

EVA的技术进展及开发应用

叙述了国内外ＥＶＡ生产的状况及其应用发展，介绍了国内外主要生产厂家的ＥＶＡ产品及其应用、ＥＶＡ生产技术的改进，建议国内增加开发ＥＶＡ树脂及其产品。     

LLDPE护套料专用树脂性能研究

ＤＦＤＡ－７０４２ＥＬＬＤＰＥ护套料专用树脂,与ＤＦＤＡ－７０４２ＬＬＤＰＥ通用树脂相比,前者不仅保持了ＬＬＤＰＥ通用树脂的技术性能,而且有效地解决了ＬＬＤＰＥ通用树脂挤出中的熔体破裂问题,使挤出物获得了良好的表面光洁度,制成的ＬＬＤＰＥ护套料,各项技术性能均满足ＧＢ１５０１５－１４国家标准中ＬＤＨ的要求,其加工性能与国际同类先进护套料相当。     

醋酸乙烯下游产品在胶粘剂行业中的应用现状

介绍了国内外醋酸乙烯下游产品聚乙烯醇、聚醋酸乙烯乳液、 Ｖ Ａ Ｅ 乳液和 Ｅ Ｖ Ａ 树脂在胶粘剂行业中的生产与应用现状,并对有关技术进展作了简单的概述     

PVC树脂加工改性剂的合成和应用

用乳液聚合方式合成了ＭＭＡ─ＥＡ共聚物。并介绍和讨论了其应用于ＰＶＣ树脂加工改性的实验结果，说明使用该助剂的ＰＶＣ树脂各项性能优良。     

国外动态

用于压力管道的ＨＤＰＥ树脂Ｄｏｗ塑料已推出了用于管道应用的新一代ＨＤＰＥ树脂。这些树脂将使管道生产商能够满足和超越所有现有的ＰＥ压力管性能标准 ,其中包括ＡＳＴＭＰＥ 3 40 8和ＩＳＯＰＥ10 0对管道级别材料的要求。Ｄｏｗ塑料ＰＥ业务副总裁ＬｅｎＡｚｚｕｒｏ认为这意味着Ｄｏｗ和联碳合并后第一种革新产品问世。该树脂改进了高温下的压力性能、劲度、耐久性 ,有突出的耐应力龟裂性能和低温韧性。现可得到的产品是ＤｏｗＤＧＤＡ -2 490ＨＤＰＥ树脂和ＤｏｗＤＧＢＣ -2 480ＨＤＰＥ树脂。两种产品分别列在塑料管道协会的目录…     

石油树脂对热熔胶、压敏胶粘接性能的影响

介绍了石油树脂的分类、增粘树脂的结构特点,国内外热熔胶、压敏胶用石油树脂发展,热熔胶对石油树脂的性能要求;论述了石油树脂与聚合物之间的相客性、石油树脂的软化点、熔融粘度等对热熔胶粘接性能的影响,展望了石油树脂的生产和发展方向.     

含磷本质阻燃环氧树脂的研究进展

综述了含磷本质阻燃环氧树脂(包括含磷协同本质阻燃体系)的发展、现状和未来趋势。与添加型阻燃剂阻燃环氧树脂相比,通过含磷环氧化合物和/或含磷固化剂把磷元素嵌入环氧树脂结构中制得的含磷本质阻燃环氧树脂,具有阻燃效率高、阻燃持久、物理力学性能不受影响、燃烧过程中毒性腐蚀性挥发物质的生成量低等优势。利用协同阻燃效应,可以进一步提高阻燃性能。但是,含磷本质阻燃环氧树脂和含磷协同本质阻燃体系存在制备工艺复杂、生产成本较高等不足。     

Polycarbonate resins

An outline of the history and manufacture of polycarbonate resins is followed by a discussion about resin product types anal their processing. The key properties of flex modulus, deflection temperature, and impact are those that make polycarbonate resins premier engineering resins. Like most other engineering plastics, polycarbonate resins' early commercial history was characterized by substitutions of polycarbonate resins for traditional materials, particularly metal and glass. Examples of applications are presented, More recently application developments involve ab initio selection of polycarbonate resins and article designs based on polycarbonate resin properties. In addition, “tailored” resins such as poly (estercarbonate) resins and polycarbonate resin blends have evolved to meet specific applications. The future growth of polycarbonate resins is predicted to feature few new resins, many new blends, and application developments using computer techniques.     

含氟树脂涂料的研究进展

概述了氟树脂的发展历程及其应用研究进展;总结了不同氟树脂的结构性能特征;归纳了PFEVE和PVDF两类典型氟树脂的基本物理性能和研究开发现状;简述了水分散氟树脂体系的制备方法。     

Studies on renewable polyphenol-based cation exchange resins of moderately high capacity

Most of the commercially available ion exchange resins at present are either styrene–DVB-based or phenol-based and these are dependent on petroleum products. In view of the ever increasing demand for ion exchange resins and the petroleum crisis, the cost of these resins is going up in leaps and bounds. Although work on ion exchange resins based on naturally occurring tannins and similar materials have been reported in the literature, their low stability, insufficiently low exchange capacity, and similar other disadvantages come in the way of commercial exploitation of these products. In the present communication, studies on preparation and properties, viz., exchange capacity, hydration, swelling, stability, etc. of some effective cation exchange resins which have been obtained from a renewable natural resource of polyphenolic nature and some small proportion of phenol have been reported. The resins studied are stable and of moderately high exchange capacity (2–3 meq/g). Substituting phenol with low-priced renewable polyphenolic material, the resultant copolymer matrix after sulfonation gives ion exchange resins which are quite economic. Their properties are comparable with the commercial resins available in the market.     

Synthesis and characterization of the epoxyfumarate resins

The synthesis and properties of the new epoxyfumarate and epoxymaleate resins obtained by the addition of acidic allyl maleate to the commercially available resin Epidian 5 are presented. The resins were synthesized in one‐ and two‐step procedures and properties of the obtained resins are compared. It should be noted that the use of allyl alcohol in the synthesis of unsaturated resins has an advantageous influence on their properties. Glass‐transition temperatures of the epoxyfumarate resins exceed 100°C, whereas those of epoxymaleates are higher than 70°C. The resins are also characterized by good chemical resistance. © 2002 John Wiley & Sons, Inc. J Appl Polym Sci 84: 716–722, 2002; DOI 10.1002/app.10067     

溶剂型丙烯酸树脂的研究进展

本文介绍了溶剂型丙烯酸树脂的发展情况及其特点,详细论述了溶剂型丙烯酸树脂的品种发展现状。另外对该产品的研究动向展开了系统的讨论,如高固体份丙烯酸树脂、SAC系列以及有机硅改性丙烯酸树脂等,并阐述了基团转移聚合方法和纳米技术对溶剂型丙烯酸树脂性能的影响。简要介绍了各类溶剂型丙烯酸树脂的在涂料工业中的应用,并对后期低污染高性能产品的开发作了展望。     

胺化聚苯乙烯树脂的制备及吸附对硝基酚

以氯甲基化聚苯乙烯树脂(PS-Cl)和氯乙酰化聚苯乙烯树脂(PS-Acyl-Cl)为母体, 引入三乙烯四胺(TETA)制备两种胺化聚苯乙烯树脂PS-TETA与PS-Acyl-TETA。用红外光谱和表面孔径吸附仪对树脂进行表征, 并用于对硝基酚(PNP)的吸附研究。静态和动态吸附实验结果表明, 两种树脂对PNP的吸附过程都可以用准二级动力学方程来描述;液膜扩散为吸附PNP的主要控制步骤;吸附符合Freundlich等温方程, 为多分子层吸附;吸附为自发的放热过程, 属于以物理吸附为主的吸附过程;PS-TETA与PS-Acyl-TETA对PNP的饱和吸附量分别为157.87mg/mL、90.77mg/mL, 穿透体积为165BV、80BV, 动态脱附率为98.4% 、98.9%。     

我国氟树脂的加工应用现状

介绍国产氟树脂主要品种，分析国产氟树脂在加工中存在的质量问题、原因及应用现状，提出一些尚待开发的氟树脂加工新工艺。     

Role of ion‐exchange resins as catalyst in the reaction‐network of transformation of biomass into biofuels

The use of acidic ion exchange resins in the transformation of biomass into biofuels is revised and their potential application is presented. Relationships between morphology and structure of resins and their catalytic activity for some existing reactions of the transformation network from sugars to biofuels are observed. In the synthesis of 5‐hydroxymethyfurfural and levulinic acid, catalytic activity of resins increases when the crosslinking content is decreased for both macroreticular and gel‐type resins. Gel‐type resins with low crosslinking were found to be the most suitable resins for direct esterification of levulinic acid with linear alcohols. However, for the alcoholysis of furfuryl alcohol, macroreticular resins are better than gel‐type ones. Deactivation probably due to humins formation is the main drawback for industrial application. © 2017 Society of Chemical Industry