MFE乙烯基酯树脂的增韧研究

采用有机改性膨润土和聚乙二醇与乙烯基酯树脂复合成功制得纳米复合材料,在保持树脂拉伸、弯曲强度的同时,树脂的断裂伸长率和耐冲击性能得到了大幅度的改善。有机膨润土和聚乙二醇含质量分数为4%和15%,冲击强度为7．58 MPa,断裂伸长率为8．99%。     

MFE乙烯基酯树脂在防腐蚀领域的应用研究

MEF乙烯基酯树脂问世20多年来，其应用领域日益扩大。本文主要介绍这类树脂在防腐蚀领域的应用研究情况。     

MFE环氧乙烯基酯树脂固化性能的研究

本文对MFE环氧乙烯基酯(含MFE型和AFE型二种型号)树脂的固化性能(凝胶时间、放热峰和固化收缩率)作了报道并进行讨论。     

MFE乙烯基酯树脂在防腐蚀领域的应用

本文主要介绍了MFE乙烯基酯树脂在化工、电子、钢铁、有色金属及轻工造纸等行业防腐方面的应用，并列举了许多华东理工大学华昌聚合物有限公司生产的MFE乙烯基酯树脂的应用实例。     

耐腐蚀乙烯基酯树脂的合成研究

本文研究了用环氧树脂和不饱和酸合成乙烯基酯树脂中影响反应的因素和条件,并指出它在防腐蚀领域是具有较高应用价值的产品。     

MFE乙烯基酯树脂在玻璃钢行业的应用

本文从国家建设部批准公布“建筑防腐蚀构造96J333(一)、(二)”中认为：“乙烯基酯树脂材料不但具有环氧树脂材料的优良的力学性能、不饱和聚酯树脂材料室温下简便成型的工艺性能,而且具有独特的耐腐蚀性能、耐温性能和耐久(抗紫外线)性以及华昌公司生产的MFE系列耐蚀乙烯基酯树脂、不饱和聚酯树脂、呋喃树脂及新型耐蚀涂料、自流平涂料等,作为高新技术产品纳入《建筑施工手册》,可以证明MFE系列耐蚀乙烯基酯树脂的应用,并且华昌公司生产的MFE乙烯基酯树脂以其优良的综合性能于1994年被国务院有关部委认定为国家级新产品。     

MFE乙烯基酯树脂及其在防腐蚀领域的应用研究(Ⅲ)

本文详细论证了MFE乙烯基酯树脂的分子结构与性能之间的依赖关系。介绍了这类树脂在防腐蚀领域的应用研究情况。     

国内外乙烯基酯树脂品种及性能概述

本文对国内市场各种类型的乙烯基酯树脂进行了归纳整理和简要介绍。     

海外乙烯基酯树脂在FRP行业中的应用

<正> 1 前言在60年代早期,FRP已被公认是解决工厂中腐蚀问题的一种特别适合及经济的材料,然而,基体树脂的选择是有限的。大多数情况下采用的聚酯基树脂,不具备高性能设备所需要的性能。极端严酷的腐蚀化学环境,要求性能更高的树脂,这种树脂不但可以耐强化学介质如盐酸或高温氢氧化物,而且可以抗工艺设备上的高应力和交变载荷。乙烯基酯树脂是一种能满足这种高性能要求的新型的用于FRP的不饱和聚酯。它是由环     

无苯乙烯乙烯基酯树脂的合成及性能研究

采用丙氧基化双酚A(D33单体)、邻苯二甲酸酐、顺丁烯二酸酐、二苯基甲烷二异氰酸酯、甲基丙烯酸羟丙酯合成了一种不含苯乙烯的环保型丙烯酸/聚氨酯/不饱和聚酯三元共聚树脂。将该树脂基体的性能:酸值、粘度、固体含量、80℃热稳定性及25℃凝胶时间,树脂浇注体的的力学性能及其FRP板材的气干性与传统双酚A型乙烯基酯树脂MFE 711进行了对比,并测试了树脂的VOC含量。结果表明,该树脂的VOC含量为104.97 g/L,远低于有害物质规定限值,并且具有与通用乙烯基酯树脂相当的液体树脂性能和力学性能,可用于光固化、手糊、喷射、缠绕、拉挤、原位固化法(CIPP)等成型工艺。     

Comparison of unsaturated polyester and vinylester resins in low temperature polymerization

Many composite products are produced at low temperatures in processes such as resin transfer molding (RTM), vacuum infusion molding (e.g., Seemann Composite Resin Infusion Molding Process—SCRIMP), and hand lay‐up. These processes are widely used for marine, civil infrastructure, transportation and defense applications. Unsaturated polyester and vinylester resins are two major resins used in these processes due to their low cost, good performance, and processibility. In this study, the reaction kinetics and rheological changes of these two resins cured at low temperatures were studied. Effects of resin type, initiator, promoter, inhibitor and retarder on the reaction kinetics and rheological behaviors were examined using a Differential Scanning Calorimeter (DSC) and a Rheometrics Dynamic Analyzer (RDA). A model was developed to quantify the effects of resin type, temperature, and different curing agents on the gel time for both polyester and vinylester resins cured at low temperatures. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1230–1242, 2001     

470乙烯基酯树脂耐NaOH腐蚀性能研究

通过将470乙烯基酯玻璃钢试块在不同温度、不同浓度NaOH溶液中的浸泡实验,对其耐腐蚀性能进行了研究。结果表明:5%NaOH介质中470乙烯基酯玻璃钢在35℃以下耐腐蚀,35~50℃尚耐腐蚀;10%NaOH中20℃以下耐腐蚀,30~40℃尚耐腐蚀;20%NaOH中25℃以下尚耐腐蚀。该结论对乙烯基酯玻璃钢产品设计选材具有重要指导作用。     

Toughness response of vinylester/epoxy‐based thermosets of interpenetrating network structure as a function of the epoxy resin formulation: Effects of the cyclohexylene linkage

Vinylester/epoxy (VE/EP)‐based thermosets of interpenetrating network (IPN) structures were produced by using a VE resin (bismethacryloxy derivative of a bisphenol A–type EP resin) with aliphatic (Al‐EP) and cycloaliphatic (Cal‐EP) EP resins. Curing of the EP resins occurred either with an aliphatic (Al‐Am) or cycloaliphatic diamine compound (Cal‐Am). Dynamic mechanical thermal analysis (DMTA) and atomic force microscopy (AFM) suggested the presence of an interpenetrating network (IPN) in the resulting thermosets. Fracture toughness (K_c) and fracture energy (G_c) were used as the toughness characterization parameters of the linear elastic fracture mechanics. Unexpectedly high K_c and G_c data were found for the systems containing cyclohexylene units in the EP network, such as VE/Al‐EP+Cal‐Am and VE/Cal‐EP+Al‐Am. This was attributed to the beneficial effects of the conformational changes of the cyclohexylene linkages (chair/boat), which were closely analogous to those in some thermoplastic copolyesters. The failure mode of the VE/EP thermoset combinations was studied in scanning electron microscopy (SEM) and discussed. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 2124–2131, 2003     

不饱和聚酯树脂改性研究进展

综述了不饱和聚酯树脂(UPR)改性的研究进展。介绍了收缩率控制机理,低收缩研究发展的4个阶段,低收缩剂LSA的典型代表——聚苯乙烯(PS),聚甲基丙烯酸甲酯(PMMA),聚醋酸乙烯(PVAc),PVAc-PS共聚物。讨论了UPR增韧改性方法,提高分子主链对称性,在分子结构中引入长链醇与长链酸,长链醇包括一缩二乙二醇、二缩三乙二醇及聚乙二醇;长链二元酸如己二酸等。此外还可加入热塑性弹性体,如液体橡胶、液体聚氨酯等以形成互穿网络结构增韧UPR。论述了提高UPR阻燃性的2种途径,即选用本质阻燃性树脂和向UPR中添加阻燃剂。介绍了含卤有机阻燃剂、无机阻燃剂、主链或主链与侧链均含磷的阻燃剂和赋予阻燃性的影响因素。介绍了部分采用可降解的植物纤维——竹纤维制备的UP复合材料和木粉改善UPR的性能。这些方法使不饱和聚酯树脂在低收缩性能、力学性能、阻燃性能等方面得到了改善,扩展了其应用范围。     

不饱和聚酯树脂产品质量存在的问题及其建议

概述了不饱和聚酯树脂的分类及应用;提出了国内不饱和聚酯树脂产品质量存在的问题及其建议.     

Study of unsaturated polyester and vinylester morphologies using excimer laser surface treatment

A technique based on the use of an ArF excimer laser (193 nm) to analyze the morphology of the unsaturated polyester and vinylester networks has been developed. This method is based on the use of the differences between the thresholds at which ablation of the various constituent phases of the materials occurs. After having determined the ablation threshold of a polystyrene, various surface treatments using excimer lasers fluence around this threshold were applied to unsaturated polyesters and vinylester. In the latter case, a two-phase structure consisting of microgels in a polystyrene phase was shown by scanning electron microscopy observations, allowing us to conclude that the mechanisms by which vinylester and unsaturated polyester networks are formed are similar. We also observed that the two-phase structure of the vinylester matrixes, unlike that of the unsaturated polyesters, is organized rather than random-structured, which could represent a major parameter contributing to the very good hydrolysis stability of these materials. In the event of degradation by osmotic mechanisms, the organized structure network would enable limiting of the development of the osmotic pressures by distributing the forces within the material, thus avoiding crazing. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1703–1714, 1997     

合成不饱和聚酯树脂的新型催化剂

介绍用自制催化剂合成通用型不饱和聚酯树脂的新工艺，克服了传统工艺的缺点，使反应速度加快，树脂质量提高，讨论了该催化剂存在下，工艺条件对反应的影响，给出了适宜的催化剂用量。