日本印制板用热固性树脂的进展

综述了日本近年在印制电路板基材中热固性树脂的发展 ,其中包括 :环氧树脂、酚醛树脂、聚酰亚胺树脂、热固性聚苯醚树脂 ,氰酸酯树脂和特殊热固性树脂。     

热固性聚苯醚树脂在高频印制电路板上的应用

介绍了高频印制电路板基材的介电性能要求和热固性聚苯醚树脂基材的制备 ,详细讨论了制备热固性聚苯醚树脂的两条技术路线及其树脂体系的特性 ,以及热固性聚苯醚树脂基覆铜板的特性 ,并简要介绍了热固性聚苯醚树脂基覆铜板的应用情况。     

生物质热固性树脂的研究进展

综述了近5年来生物质热固性树脂,包括环氧树脂、酚醛树脂和聚氨酯等研究进展。概述了几种生物质热固性树脂的制备方法、合成条件和反应原理,分析了生物质热固性树脂的性能如玻璃化转变温度(T_g)、热分解温度、拉伸强度、弯曲强度、断裂伸长率、弹性模量、硬度、溶胀率、残炭率、可降解温度、游离酚含量和游离甲醛含量等,并与非生物质热固性树脂(双酚A环氧树脂、酚醛树脂和聚氨酯等)进行了比较。展望了生物质热固性树脂的发展前景。     

热固性树脂的增韧进展

综述了国内外近年来通过采用刚性粒子、橡胶弹性体、热塑性树脂、形成半互穿聚合物网络及液晶聚合物等手段对热固性树脂进行增韧改性的研究进展。重点对橡胶弹性体和热塑性树脂增韧改性热固性树脂的影响因素进行了分析,指出了目前热固性树脂增韧改性技术存在的问题及发展趋势。     

耐高温热固性树脂胶粘剂的研究动态

综述了耐高温热固性树脂胶粘剂的发展过程与研究现状,介绍了近年来国内外几种性能优异的热固性树脂胶粘剂,提高其高温性能的一些主要途径和改性方法,并介绍了新型功能填料在树脂中的应用情况,最后对耐高温热固性树脂胶粘剂的总体发展趋势进行了展望。     

中科院实现碳纤维增强环氧树脂的高效降解及循环利用

<正>日前,中科院山西煤化所侯相林研究团队实现了热固性树脂基复合材料的高效降解和全成分回收。据了解,该团队提出选择性断键降解回收热固性树脂的新思路,并利用配位不饱和或弱配位的金属离子选择性地断裂树脂化学键,从而实现了热固性树脂基复合     

2004年我国热固性工程塑料进展

分类列出了2004年我国在热固性树脂及塑料方面的研究及进展。从国内公开发表的文献看,2004年除传统热固性大品种树脂的改性、功能化、专用化依然是研究热点外,新型结构的大品种热固性树脂的合成及新型热固性树脂的合成也逐渐成为研究重点。     

热固性树脂的组成及其应用

正本发明公开了一种热固性树脂组合物,包括每种树脂分子中含有2个或2个以上环氧基的环氧树脂和含有苯乙烯结构的活性酯。所述热固性树脂组合物用于制备树脂片、树脂复合金属铜箔、预浸料、层压板、覆铜板、印刷电路板等。热固性树脂组分显著降低了PCB基板分层的可能性,所得树脂组分具有优异的热稳定性和耐湿热性,较低的介电常数和     

日本热固性树脂发展动向

日本在热固性树脂品种与产量均是比较多的国家，热固性树脂品种主要有以下种类：酚醛树脂、腺醛树脂、三聚氰胺树脂、不饱和聚酯树脂、醇酸树脂、环氧树脂、有机硅树脂、聚氨酯泡沫塑料等，这些热固性树脂品种，在1991年至1996年产量概况请参见下表。表1日本主要热固性树脂品种产量的变化（单位吨％）注：化学工业统计年报及月报从上表1看出，日本热固性树脂总计年产量在ZOO万吨左右，产量比较大的品种为：脉醛树脂、酚醒树脂、聚氨酯树脂，环氧树脂仅为热固性树脂总产量的十分之一左右。上述热固性树脂中酚醇树脂、肥醛树脂、三聚氰胺树…     

关于热固性树脂供给侧改革的思考

在天津石化产业的内外部发展环境发生重大变化的背景下,本文结合供给侧改革政策,介绍了热固性树脂在纳米技术应用下的改性复合材料,包括热固性树脂/蒙脱土纳米复合材料和热固性树脂/碳纳米管纳米复合材料,以及其存在的问题和应用前景。     

Preparation and cured properties of novel cycloaliphatic epoxy resins

Preparation and characterization of novel cycloaliphatic epoxy resins, which are derived from octadienyl compounds, were studied. From a model peracetic acid epoxidation reaction using 2,7-octadienyl acetate-1, the structure of the liquid resins is estimated to be mainly terminal epoxides and some amount of inner epoxide depending on the epoxide content. The epoxy resins offer lower toxicity and lower vapor pressure. The reactivity of the resin with acid anhydrides is moderate but faster than that of traditional cyclohexane epoxide-type resins and slower than that of the glycidyl ester-type resins. This reactivity was also examined using model compounds. The heat deflection temperature of the hexahydro-phthalic anhydride-cured resins is shown to be directly proportional to the number of epoxy groups in the molecules. The flexural strength of the cured resins is nearly equivalent to that of the commercial resins, although the flexural elongation of the resins is larger than that of the rigid cyclohexane epoxide-type resins. The thermal stability of the cured resins is comparable to typical rigid cycloaliphatic resins; furthermore, high water resistance of the cured resins is suggested to be attributed to the hydrophobic character of the C₈ chain by cross-linking. © 1993 John Wiley & Sons, Inc.     

小粒橡胶粒子对SAN树脂的增韧作用

采用PB-g－SAN和SBR－g－SAN两种弹性体粒子分别与SAN树脂熔融共混,制得了一系列ABS树脂,研究了ABS树脂的形态结构和力学性能,结果发现,PB和SBR橡胶粒子均匀地分散在SAN基体中,其径分别为0.28μm和0.05μm左右。力学性能结果表明,在SAN树脂中随着PB-g－SAN含量的增加,ABS的冲击强度不断提高,而SBR小橡胶粒子不能增韧SAN树脂,但当SAN树脂中含有15％的PB-g－SAN共聚物时,随着SBR－g－SAN含量的增加,ABS树脂的冲击强度不断提高,SBR－g－SAN这种小橡胶粒子又表现出良好的增韧作用。     

SAN树脂的相对分子质量对ABS树脂力学性能的影响

通过将三种不同相对分子质量的SAN树脂与同一种ABS接枝粉料进行熔融共混 ,测试共混物的力学性能 ,比较了三种SAN各自的增韧特性。实验结果表明 :SAN树脂的相对分子质量越高 ,制得的ABS树脂的冲击强度和断裂伸长率越高。SAN树脂的相对分子质量对ABS树脂的拉伸强度没有影响。SAN树脂的低聚物和挥发成分对拉伸强度影响较大。将高相对分子质量SAN和低相对分子质量SAN按不同比例混合后 ,再与ABS接枝粉料以 18份橡胶共混 ,考察了高相对分子质量SAN的加入对共混物冲击强度和熔体流动速率的影响。在SAN树脂中加入高相对分子质量SAN树脂后 ,可以提高ABS树脂的冲击强度 ,显著降低加工流动性     

Water-soluble sulfonated amino–formaldehyde resins. IV. Melamine–urea resins: Synthesis and properties

The factors affecting the preparation and the properties of sulfonated melamine urea–for-maldehyde resins were studied. The resins weresynthesized using a four-step procedure previously used in preparing sulfonated melamine formaldehyde resins. The melamine–urea resins required higher hydroxymethylation and condensation temperatures as the percentage of urea increased. The molecular weight distribution of the prepared resins revealed the formation of low molecular weight species in increasing amounts with higher percentages of urea. The effectiveness of the prepared resins as dispersants for concrete mixes was found to be lower than the pure melamine resins; however, it was possible to enhance them by raising the ratio of sulfonated groups in the resins.     

Synthesis and properties of novel phenolic resins modified with nanosized copper particles

Phenol–formaldehyde (PF) resins modified with nanosized copper particles were synthesized by an in situ polymerization process. X‐ray diffraction analysis and transmission electron microscopy revealed that the copper particles in the resulting PF resins had a spherical geometry with a size of 30–60 nm in diameter, and there were about 5% of the particles which were agglomerated. The thermal properties of the resulting PF resins were investigated using TGA. It was found that the copper nanoparticles markedly improved the thermal stability of the PF resins at lower temperatures. The initial decomposition temperature of the modified PF resins could be increased by 47 °C compared to unmodified resins. However, the copper nanoparticles increased the rate of degradation of the PF resins at elevated temperatures. The effects of copper nanoparticles on the thermal properties of the PF resins when used as binders for friction materials are beneficial. The toughness of the resulting PF resins was also studied. The results revealed that copper nanoparticles obviously improved the brittleness of the PF resins. The impact strength of the modified PF resins was increased by 66.6% compared to unmodified resins. Copyright © 2006 Society of Chemical Industry     

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。     

Synthesis and properties of cationic resins derived from aniline-modified epoxy resins and various amines

Aniline-modified epoxy resin which contains tertiary amine in the middle of the polymer chain was synthesized by the reaction of aniline and epoxy resin. The resulting aniline-modified epoxy resin and two commercial epoxy resins with different epoxy equivalent weights were reacted with 2-ethylhexanol-blocked toluene diisocyanate (2-EH-blocked TDI) to obtain thermally crosslinkable epoxy resins. These epoxy resins were subsequently reacted with various secondary amines and partially neutralized with acetic acid to give thermally crosslinkable cationic resins. The resulting cationic resins were dissolved in suitable solvents and mixed with deionized water to form emulsions. The crosslinking properties, emulsion, and electrodeposition properties of these resins were studied in some detail. The electro-deposition yields of the emulsions prepared from aniline-modified epoxy resins were higher than those of other emulsions. The crosslinked films prepared from aniline-modified epoxy resins were also glossier than those prepared from commercial epoxy resins. High deposition yield and high glossiness were the characteristic properties of the aniline-modified epoxy resins. Thermal properties were not affected by aniline-modified epoxy resins.     

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。     

凝结水混床的混合及水流分布的研究

研究了对运行状态下的凝结水混床树脂层,用专用树脂取样管,取出在横截面不同位置、不同深度的树脂样,分析阴、阳树脂的比例、失效度和主要离子成分．了解了混床内阴、阳树脂混合的均匀性及水流分布情况,进而分析凝结水混床出现问题的原因,并提出对策。     

淀粉改性聚乙烯醇缩甲醛树脂的工艺研究

由于传统的PVA缩醛树脂是由PVA和甲醛制备的,所以树脂中的游离甲醛含量高。通过改变合成工艺,用淀粉对聚乙烯醇缩甲醛树脂进行改性,制得了游离甲醛含量低的树脂。考察了淀粉用量、体系pH值、反应时间、反应温度对树脂性能的影响,并采用了红外光谱对树脂结构进行了表征。根据此合成方法生产的产品具有工艺简单、游离甲醛含量低、耐水性能好、成本低等优点。