气干性酚醛环氧乙烯基树脂的研制

采用交联共聚法合成了气干性酚醛环氧乙烯基树脂。研究了物料配比、阻聚剂用量、反应温度对反应的影响,测试了树脂的耐腐蚀性、气干性和力学性能。结果表明,酯化过程最佳工艺条件为:反应温度110～115℃,反应时间2.5 h,醇、酸物质的量比1.1∶2,阻聚剂质量分数0.05%,催化剂质量分数0.3%。交联聚合过程最佳工艺条件为:反应温度75～85℃反应时间2.0 h,改性剂(甲苯二异氰酸酯)加入质量5%。合成的树脂的弯曲强度为101 MPa,弯曲模量3.66 GPa,冲击强度11.4 kJ/m2,气干性、韧性、固化性能均超过同类树脂,可用于耐温强腐蚀场合以及用作表面涂层、耐温腻子基体树脂、自流平树脂等。     

气干性环氧乙烯基树脂的合成

通过普通环氧乙烯基树脂与三羟甲基丙烷二烯丙基醚(TMPDE),甲苯二异氰酸酯(TDI)及苯乙烯的预聚物反应制得气干性环氧乙烯基树脂。通过表干时间和实干时间测试研究了不同预聚物含量对产物气干性的影响,并对产物的力学性能和耐腐蚀性能进行了测试。结果表明,预聚物与普通环氧乙烯基树脂的质量比为3.5∶10时,产物性能最佳。最佳配方为:m(普通环氧乙烯基树脂)∶m(TDI)∶m(TMPDE)∶m(苯乙烯)=10∶0.75∶0.75∶1.5,产物的表干时间为26 min,实干时间为1 h,无缺口冲击强度为8.95 kJ/m2,弯曲强度为104 MPa,弯曲模量为3.22 GPa,热变形温度为119.0℃,具有较好的耐腐蚀性。     

环氧乙烯基酯树脂(Ⅳ)环氧乙烯基酯树脂的耐化学性

对环氧乙烯基酯树脂及与其相关的聚合物的耐化学性作了论述。其包括聚芳烃、聚二烯烃、含氯氟聚合物、含羟基聚合物、聚酯、聚酰胺、聚氨酯、聚缩醛都分别进行了论述。     

环氧乙烯基酯树脂(Ⅴ)环氧乙烯基酯树脂的物理、力学性能

论述了环氧乙烯基酯树脂的物理、力学性能与分子结构之间的依赖关系以及各性能间的相互关系。     

环氧乙烯基酯树脂的水解稳定性

本文对影响环氧乙烯基酯树脂的各种结构因素作了较为详细的论述。     

环氧乙烯基酯树脂（I）环氧乙烯基酯树脂的分类、合成和固化

对环氧乙烯基酯树脂的分类，合成和固化作了叙述，并与普通不饱和聚酯固化过程进行了比较。     

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。     

环氧乙烯基酯树脂 (Ⅰ)环氧乙烯基酯树脂的分类、合成和固化

对环氧乙烯基酯树脂的分类、合成和固化作了叙述 ,并与普通不饱和聚酯固化过程进行了比较。     

环氧乙烯基酯树脂种类及性能

本文收集整理了国内外几种品牌的环氧乙烯基酯树脂，简要介绍其性能和应用     

环氧乙烯基酯树脂 (Ⅲ)环氧乙烯基酯树脂在有机溶剂中的稳定性

对环氧乙烯基酯树脂在有机溶剂中的稳定性作了理论上的探讨,并提供了3种环氧乙烯基酯树脂的溶解度参数实验数据。     

环氧乙烯基酯树脂的性能研究

以环氧树脂和(甲基)丙烯酸为基本原料,合成环氧(甲基)丙烯酸酯树脂并进行了表征。用环氧(甲基)丙烯酸酯以及其它活性单体和添加剂制备出室温快固型双组分树脂,采用正交实验获得制备树脂的最佳配方,并对环氧(甲基)丙烯酸酯树脂的性能进行了分析比较。     

Kinetic parameters estimation for cure reaction of epoxy based vinyl ester resin

A new graphical estimation technique is proposed for the determination of the kinetic parameters describing an autocatalytic reaction. A differential scanning calorimeter was used to monitor the reaction kinetics of an epoxy-based vinyl ester resin. The method utilizes information from a zero initial reaction rate, conversation at vitrification, the ratio of reaction rate constants under different isothermal conditions, and characteristics of the phenomenological kinetic model with assumptions being made about the overall reaction order. By fitting data to the integrated reaction rate equation with adjustments for the isothermal conditions, the kinetic parameters are estimated without using a linear or nonlinear regression method. Different kinetic parameters can be estimated from data before and after the gel point which was obtained from the relationship between the glass transition temperature and the degree of cure.     

带环氧基丙烯酸树脂改性环氧树脂防腐涂料的性能

利用自由基聚合法合成了带环氧基丙烯酸树脂,并对其结构进行了表征,研究了引发剂和链转移剂用量对带环氧基丙烯酸树脂黏度的影响。将带环氧基丙烯酸树脂与环氧树脂按1∶9的质量比混合,复配防腐颜料及填料制备改性环氧树脂防腐涂料,并测定了其层间附着力和防腐蚀性能。结果表明:单体发生完全聚合,且聚合物带环氧基;随着引发剂和链转移剂用量的增加,带环氧基丙烯酸树脂的黏度下降;与纯环氧树脂防腐涂料相比,改性环氧树脂防腐涂料的层间附着力更高,n(MMA)∶n(BA)∶n(GMA)为6.00∶3.00∶0.475和6.00∶3.00∶1.000的涂料配方耐盐雾性和电化学阻抗更优。     

Liquid crystalline epoxy resin modified cyanate ester/epoxy resin systems

Liquid crystalline epoxy resin (LCE) modify cyanate ester/epoxy resin blend systems were studied by scanning electron microscope, polarizing optical microscope, thermogravimetric analyzer, differential scanning calorimetry, thermal mechanical analysis, and rheometers. With the addition of LCE resin, the blends showed both an enhanced curing rate and increased glass transition temperature of cured samples. The phase structures of the blends changed from homogenous to liquid crystalline phase when the content of LCE was increased. At the same time, the mechanical properties were also improved and thermal expansion coefficients were lowed down. The thermal degradation temperatures showed little differences, while the residue char yields were slightly increased with the addition of LCE. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

耐腐蚀性乙烯基酯树脂的研究与应用

论述了乙烯基酯树脂优异的耐腐蚀性能,耐腐蚀原理及目前国内外耐腐蚀性乙烯基酯树脂的研究进展和在一些领域的典型应用。     

风力发电机叶片用环氧乙烯基酯树脂

简述了国内外风力发电发展概况及风机叶片成型工艺及要求,研制了风力发电机叶片用MFE-VARIM-200环氧乙烯基酯树脂,对该树脂的粘度、凝胶时间、固化收缩率及固化物的力学性能等进行了测试。结果表明,该液体树脂的粘度(25℃)<0.2 Pa.s,凝胶时间(随环境温度调节引发剂用量)>2 h,线收缩率<0.3%,可以满足真空灌注成型工艺的要求,固化物的力学性能可满足风力发电机叶片对基体树脂的要求。     

酚醛环氧乙烯基酯树脂碳纤维复合材料的制备及性能研究

把酚醛环氧乙烯基酯树脂分别与固化剂过氧化氢异丙苯(CHP)、过氧化苯甲酸叔丁酯(TBPB)、过氧化二异丙苯(DCP)进行混溶,模压成型,碳纤维层合板,进行了力学性能和热稳定性的研究。结果表明,研究的碳纤维-酚醛环氧基乙烯基酯树脂复合材料具有非常好的力学性能及热稳定性,弯曲强度达到1 400～1 900 MPa。     

Advanced anticorrosion coatings prepared from polybenzoxazine/siloxane-containing epoxy resin

In this study, a new type of coating comprising benzoxazine and siloxane-containing epoxy (SiEP) resin was prepared by the thermal curing method. The FTIR (Fourier transform infrared) analysis not only confirmed the complete reaction between polybenzoxaine and SiEP resin after heat curing, but also found the hydrogen-bonding interactions between them. The addition of SiEP resin significantly enhanced the hydrophobicity and adhesion ability of the coating and greatly improved the water contact angles of the blend coatings (>108°), compared to that of the pristine PBa coating, which attributed to the introduction of a Si O Si network structure in the matrix. In addition, the corrosion resistance of the coating was tested though a series of electrochemical experiment. According to the results, the corrosion current values of the blend coatings decreased by about four orders of magnitude compared to that of the pristine carbon steel, and the corrosion protection efficiency of the blend coatings were >99%, indicating good application prospect of these blend coatings.