二环戊二烯—苯酚树脂的合成及其在油性漆中的应用

在三氟化硼催化剂存在下，采用二环戊二烯和苯酚合成了二环戊二烯－苯酚树脂，并用此树脂和亚麻油配制成油性漆。列举了漆膜的各项性能指标。讨论了不同摩尔比二环戊二烯和苯酚，以及反应温度对树脂的软化点和游离酚含量的影响。试验表明，热塑性二环戊二烯－苯酚树脂可作为涂料用树脂，在一定程度上可改善漆膜的气干性。     

用二环戊二烯合成气干型不饱和聚酯树脂

用二环戊二烯,顺丁烯二酸和乙二醇合成不饱和聚酯,这种不饱和聚酯既可浇铸,也可以在空气中固化。     

双环戊二烯邻甲酚环氧树脂的合成与表征

以邻甲酚和双环戊二烯为原料,通过Friedel-Crafts反应,合成了双环戊二烯邻甲酚酚醛树脂(DPR),该树脂用环氧氯丙烷进行环氧化制备出双环戊二烯邻甲酚环氧树脂(DER).所得环氧树脂的环氧值为0.33,结构也得到了表征.分别以甲基六氢苯酐(MeHHPA)和聚酰胺651作为固化剂,通过DSC考察了该树脂的固化,固化温度峰值分别为141℃和168℃.在双酚A环氧树脂E51中添加不同比例的所制备的双环戊二烯邻甲酚环氧树脂DER,发现固化树脂的玻璃化转变温度Tg同单纯的E51固化树脂相比提高约20℃.     

二环戊二烯在脂环／芳香族环氧树脂中的应用

本文概述了以二环戊二烯及其衍生物为基础的脂环／芳香族环氧树树研究与开发近况；并介绍了这些树脂的主要特性及其在电子工业中的一些应用。     

二氯二环戊二烯基锆合成方法的改进

双环戊二烯在180°C解聚为环戊二烯,冰水浴条件下环戊二烯与钠砂反应得到环戊二烯基钠,再在二甲苯为溶剂、低温下环戊二烯基钠与四氯化锆按理论摩尔比2∶1反应3h时得到二氯二环戊二烯基锆,整个过程始终要用氮气保护。产率可以达到70%。     

环氧树脂/双环戊二烯双酚型氰酸酯树脂共聚体系固化动力学研究

采用Ozawa方法和Kissinger方法研究了环氧树脂和双环戊二烯双酚型氰酸酯树脂(DCPDCE)共聚体系的固化动力学,并计算了活化能、指前因子、不同温度下的反应速率常数和共聚物的总反应级数。研究结果表明,体系中加入环氧树脂后,提高了体系的反应活化能,明显降低了室温时的反应速率常数,而对固化温度(180℃)时的反应速率常数影响不大。不同环氧树脂含量的共聚体系固化反应级数均接近1级反应。     

特种环氧树脂二氧化双环戊二烯的合成研究

采用过醋酸环氧化双环戊二烯法合成了特种环氧树脂二氧化双环戊二烯。探讨了双环戊二烯规格,H2O2浓度及与醋酸的配比,环氧化温度及中和水洗条件对产物性能的影响。结果表明,采用50%的H2O2,醋酸与H2O2的物质的量比为2∶1,反应温度(35±5)℃,搅拌3 h制得的过醋酸浓度为20%～24%。采用熔点20℃以上的双环戊二烯为原料,其与过醋酸物质的量比为1∶2.2,环氧化温度(35±5)℃制得的二氧化双环戊二烯收率稳定在80%左右,密度1.330 g/cm3,熔点184℃以上,环氧值1.22。     

紫外光固化低黏度环氧丙烯酸酯的合成研究

以双酚F环氧树脂和丙烯酸为原料,合成紫外光固化低黏度双酚F型环氧丙烯酸酯。讨论了引发剂、阻聚剂、反应温度等因素对反应的影响,用IR对环氧树脂及环氧丙烯酸酯的结构进行了表征。     

双环戊二烯-叔丁基苯酚树脂的合成

在BF3-Et2O催化剂的存在下，用双环戊二烯和对-叔丁基苯酚为原料合成双环戊二烯-叔丁基苯酚树脂。实验表明：催化剂用量0．5%，反应先在85℃进行，3h后升温至120℃反应，双环戊二烯与对-叔丁基苯酚摩尔比约为1：1～1:2．5,可合成较高软化点、较好油溶性能的双环戊二烯-叔丁基苯酚树脂。     

双组分水性环氧防腐涂料的研制

采用双酚A型环氧树脂与非离子表面活性剂反应,合成了反应型水性环氧乳化剂,将具有表面活性的分子链段引入到环氧树脂分子链中,用相反转技术制备水性环氧树脂乳液。为了改善乳液与固化剂的相容性,合成了聚醚型水性环氧树脂固化剂,用其制备的双组分水性环氧防腐涂料具有优异的机械性能、耐水性、耐盐水性及耐盐雾性。     

Synthesis and Characterization of Dicyclopentadiene – cresol Epoxy Resin

Summary Starting from cresol, the synthesis of dicyclopentadiene (DCPD) – cresol epoxy resin was conducted. DCPD-containing phenol resin (DPR) was prepared via Friedel–Crafts alkylation, whereas DCPD-containing epoxy resin (DER) was prepared via epoxidation of DPR with epichlorohydrin. The chemical structure was characterized with FTIR and ¹HNMR. Cure behaviors and glass transition temperature (T_g) of the resulting polymers were studied by differential scanning calorimeter (DSC). The results clearly indicated that cured polymer with a mixture of DCPD-cresol epoxy resin and diglycidyl ether of bisphenol A (E51) had higher T_g comparing with E51.     

Low dielectric thermoset. I. Synthesis and properties of novel 2,6‐dimethyl phenol‐dicyclopentadiene epoxy

A 2,6‐dimethyl phenol‐dicyclopentadiene novolac was synthesized from dicyclopentadiene and 2,6‐dimethyl phenol, and the resultant 2,6‐dimethyl phenol‐dicyclopentadiene novolac was epoxidized to 2,6‐dimethyl phenol‐dicyclopentadiene epoxy. The structures of novolac and epoxy were confirmed by Fourier transform infrared spectroscopy (FTIR), elemental analysis, mass spectroscopy (MS), nuclear magnetic resonance spectroscopy (NMR), and epoxy equivalent weight titration. The synthesized 2,6‐dimethyl phenol‐dicyclopentadiene epoxy was then cured with 4,4‐diaminodiphenyl methane (DDM), phenol novolac (PN), 4,4‐diaminodiphenyl sulfone (DDS), and 4,4‐diaminodiphenyl ether (DDE). Thermal properties of cured epoxy resins were studied by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), dielectric analysis (DEA), and thermal gravimetric analysis (TGA). These data were compared with those of the commercial bisphenol A epoxy system. Compared with the bisphenol A epoxy system, the cured 2,6‐dimethyl phenol‐ dicyclopentadiene epoxy resins exhibited lower dielectric constants (～3.0 at 1 MHz and 2.8 at 1 GHz), dissipation factors (～0.007 at 1 MHz and 0.004 at 1 GHz), glass transition temperatures (140–188°C), thermal stability (5% degradation temperature at 382–404°C), thermal expansion coefficients [50–60 ppm/°C before glass‐transition temperature (T_g)], and moisture absorption (0.9–1.1%), but higher modulus (～2 Gpa at 60°C). © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 2607–2613, 2003     

环氧丙烯酸双酯树脂的合成与表征

探讨了季铵盐催化环氧树脂与丙烯酸的酯化反应过程中催化剂、反应温度、反应时间对反应过程的影响 ,对反应产物进行了化学分析和红外光谱表征。结果表明 ,反应过程中环氧基团和羧基基团的消耗速率是相当的 ,适当提高温度有利于酯化反应的进行     

低粘度液态双酚F型环氧树脂的性能研究

分析了自制的双酚F型环氧树脂固化物的力学性能 ,讨论了双酚F型与双酚A型环氧树脂共混体系的性能。展望了双酚F型环氧树脂的应用前景     

新型含萘环/环戊二烯环结构固化剂的合成及性能

A novel novolac curing agent containing both naphthalene and dicyclopentadiene （DCPD） moieties was prepared to produce a highly heat-resistant cured polymer network. The chemical structure was characterized using Fourier transform infrared spectroscopy, nuclear magnetic resonance, mass spectrometry, and gel permeation chromatography analyses. The thermal properties of the resulting polymer from diglycidyl ether of bisphenol A epoxy resin cured with the novel curing agent were evaluated using dynamic mechanical thermal analysis and thermogravimetric analysis. Compared with the conventional curing agent, the resulting polymer cured with naphthalene/DCPD navolac shows considerable improvement in heat resistant properties such as higher glass transition temperature （Tg） and thermal stability. The result also shows better moisture resistance because of the hydrophobic nature of naphthalene/DCPD structure.     

溴化环氧树脂合成的研究

本文主要介绍了由环氧氯丙烷(ECH)与不同比例的四溴双酚A(TBBPA)和双酚A(BPA)混合物合成溴化环氧树脂。也可以根据溴含量和分子量的不同要求,先合成液态双酚A型环氧树脂或不同溴含量的液态溴化环氧树脂,再与TBBPA或BPA,或BPA和TBBPA的混合物反应,合成不同活性、不同溴含量的溴比环氧树脂即二步法。     

Viscoelastic, Thermal and Mechanical Properties of Dicyclopentadiene Bisphenol Diyanate Ester / Epoxy Co-polymers

Summary Dicyanate ester containing dicyclopentadiene cycles and epoxy co-polymers were prepared by copolymerization between epoxy and dicyclopentadiene bisphenol cyanate esters (DCPDCE). Viscoelastic properties of the co-polymers were characterized by the technique of dynamic mechanical analysis (DMA), which indicated that the introduction of E51 in the co-polymers would effectively improve the toughness of DCPDCE, while the thermal dimensional stability would be weakened. Results from thermogravimetric analysis (TGA) are in good accordance with the T_g values from DMA curves. Mechanical testing of the cured co-polymers shows that E51 can improve the mechanical properties of the co-polymers while its usage is controlled among 5% to 15%.     

双酚A型环氧树脂涂料的分离及表征

介绍了双酚 A型环氧树脂涂料配方的剖析方法。通过 IR及 NMR等方法对纯化的环氧树脂进行了表征并与传统的化学滴定测环氧值方法比较 ,用 NMR法测定双酚 A型环氧树脂数均相对分子质量的方法 ,建立了数均相对分子质量与环氧值之间的关系。