紫外光固化体系的研究进展

综述了紫外光固化体系,包括自由基紫外光固化体系、阳离子紫外光固化体系、自由基-阳离子混杂光固化体系和双重固化体系的研究进展。     

辐照固化涂进展（I）

本文从自由基光固化体系，阳离了光固化体系、电子束固化体系等方面记述了辐照固化涂料的进展 。     

电子束固化机理

主要从下述几方面介绍了电子束固化机理：电子束和紫外光固经机理比较;电子束与介质相互作用过程;电子束固化过程中起作用的活性粒子;电子束固化丙烯酸酯体系和阳离子体系的机理等。     

环氧树脂非等温固化动力学及其固化工艺的研究

采用差示扫描量热法（DSC）研究了N-乙基邻对甲苯磺酰胺/环氧树脂体系的固化过程,研究了不同配比对固化反应的影晌,固化度与固化温度的关系,计算了固化反应表观活化能和反应级数,确定了N-乙基邻对甲苯磺酰胺/环氧树脂体系的固化工艺。结果表明：不同升温速率下,体系固化温度有很大差异,随着升温速率的提高,固化温度增加。通过动力学计算得到体系最佳固化温度为90℃,固化时间为4~6 h,固化体系的活化能为29.1 kJ/mol,反应级数为0.81。     

用于热敏底材的紫外光固化粉末涂料

一种新型ＵＶ固化体系，能使配制的粉末涂料适用于木材和塑料之类热敏材料上，该体系避免了用液态ＵＶ固化体系常遇到的挥发物刺激性问题。环保适宜的粉末涂料技术和辐射固化技术二者相结合，所得体系在低温下快速交联，并且在固化期间几乎不产生挥发性物质。     

湿法缠绕用次中温固化的环氧树脂配方

采用自制改性液态芳香胺制得一种低粘度次中温固化环氧树脂体系，通过不同升温速率下的固化过程DSC扫描，研究了该体系的固化反应动力学，并据其优化了体系的固化制度。结果表明，该体系的表观固化反应活化能为38．54kJ／mol，反应级数为0．84。固化度和FT—IR测试表明，体系可在90℃次中温环境中达到固化完全。体系综合性能优良，可满足复合材料湿法缠绕成型对高性能树脂基体的要求。     

几种不饱和聚酯树脂的固化体系

本文介绍了几种不饱和聚酯树脂的固化体系,包括反丁烯二酸二丁酯-过氧化物低毒固化体系;以BP-1、BP-2为促进剂的无色固化休系;以β二酮-环烷酸钴为复合促进剂的固化体系;有机硫化合物-金属盐-过氧化物固化体系以及有机锰、钒促进剂固化体系等,同时还介绍了这些固化体系的固化配方。     

改性芳香胺固化环氧树脂的研究

本文研究了改性芳香胺固化剂固化环氧树脂动力学。分析确定了该体系的最佳固化工艺,使用两种模型法对固化过程进行了拟合。研究表明,该固化体系适用于中低温固化条件,n级模型法不适用该体系,而自催化模型中使用简化双参数SB模型能够较好的拟合固化过程。     

环氧树脂／液晶固化剂固化反应动力学研究

通过差热分析（DSC）研究了非等温过程环氧树脂／液晶固化剂体系的固化反应动力学,研究了不同配比对固化反应的影响,固化反应转化率与固化温度的关系,计算了固化反应的活化能,确定了环氧树脂／液晶固化剂的固化工艺条件,用偏光显微镜观察了环氧树脂／液晶固化剂／4,4－二氨基二苯砜（DDS）体系在不同温度下固化时的形态。结果表明：液晶固化剂的加入量越大,固化反应速度越快;环氧树脂／液晶固化剂体系固化反应的活化能力为71.5kJ/mol,偏光显微镜观察表明：随着固化起始温度的增加,固化体系的形态由原来的具有各向异性的丝状结构变化为各向同性,液晶丝状条纹消失。     

环氧树脂/液晶固化剂固化反应动力学研究

通过差热分析 (DSC)研究了非等温过程环氧树脂 /液晶固化剂体系的固化反应动力学 ,研究了不同配比对固化反应的影响 ,固化反应转化率与固化温度的关系 ,计算了固化反应的活化能 ,确定了环氧树脂 /液晶固化剂的固化工艺条件 ,用偏光显微镜观察了环氧树脂 /液晶固化剂 / 4 ,4′ -二氨基二苯砜 (DDS)体系在不同温度下固化时的形态。结果表明 :液晶固化剂的加入量越大 ,固化反应速度越快 ;环氧树脂 /液晶固化剂体系固化反应的活化能为 71 5kJ/mol;偏光显微镜观察表明 :随着固化起始温度的增加 ,固化体系的形态由原来的具有各向异性的丝状结构变化为各向同性 ,液晶丝状条纹消失。     

新型酚醛树脂固化反应动力学及固化机理研究

采用DSC热分析对S酚醛树脂的固化过程进行了动力学研究,得出了该树脂的固化工艺温度及固化动力学参数,其凝胶化温度、固化温度和后处理温度分别为360.7K、421.6K和463.4K;反应级数n=0.912、表观活化能E=76.14kJ·mol^-1,反应频率因子A=4.704×10^8min^-1。采用红外光谱分析初步探讨了该树脂的固化机理,结果表明其固化反应主要是苄羟基与苯环邻位上活泼氢产生交联缩合反应,少量为苄羟基之间的缩合反应。     

环氧浇铸体固化过程放热研究

本文研究了环氧树脂在不同固化剂体系时的固化放热曲线和温度差异,测定了树脂的固化度,并对填料加入的影响进行了分析。     

Optimal cure steps for product quality in a tire curing process

Numerical algorithms and computer programs have been developed to determine optimal cure steps in a tire curing process. A dynamic constrained optimization problem was formulated with the following ingredients: (1) an objective function that measures product quality in terms of final state of cure and temperature history at selected points in a tire; (2) constraints that consist of a process model and temperature limits imposed on cure media; (3) B‐splines representation of a time‐varying profile of cure media temperature. The optimization problem was solved using the complex algorithm along with a finite element model solver. Numerical simulations were carried out to demonstrate the procedure of determining optimal cure steps for a truck/bus radial tire. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2063–2071, 1999     

氨基树脂新型潜伏性固化催化剂的研究

研究并成功地合成了一种新型潜伏性固化催化剂,并将其应用于氨基树脂粉的固化,取得了固化温度低、流动性好、交联度高、热稳定性好等效果。与传统的固化催化剂进行了比较,认为是目前氨基树脂粉最为理想的固化剂。     

Curing characteristics of epoxy resin systems that include a biphenyl moiety

The curing characteristics of epoxy resin systems that include a biphenyl moiety were investigated according to the change of curing agents. Their curing kinetics mainly depend on the type of hardener. An autocatalytic kinetic reaction occurs in epoxy resin systems with phenol novolac hardener, regardless of the kinds of epoxy resin and the epoxy resin systems using Xylok and DCPDP (dicyclopentadiene‐type phenol resin) curing agents following an nth‐order kinetic mechanism. The kinetic parameters of all epoxy resin systems were reported in terms of a generalized kinetic equation that considered the diffusion term. The fastest reaction conversion rate among the epoxy resin systems with a phenol novolac curing agent was obtained in the EOCN‐C epoxy resin system, and for systems with Xylok and DCPDP hardeners, the highest reaction rate values were obtained in NC‐3000P and EOCN‐C epoxy resin systems, respectively. The system constants in DiBenedetto's equation of each epoxy resin system with different curing agents were obtained, and their curing characteristics can be interpreted by the curing model using a curing agent as a spacer. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1942–1952, 2002     

叠氮黏合剂非异氰酸酯固化技术进展

随着新型绿色含能材料ADN应用,叠氮黏合剂非异氰酸酯固化技术逐渐引起国内外推进剂研究人员重视。从固化机理、固化剂种类、叠氮黏合剂非异氰酸酯固化技术应用及新型叠氮黏合剂/固化剂研制等方面对该技术进行了综述。     

DSC study on the effect of cure reagents on the lignin base epoxy cure reaction

The cure reactions of liquid lignin base epoxy resin (LEPL) with three different curing agents, viz., methylhexahydrophthalic anhydride, maleic anhydride, and 2‐methyl‐4‐methylimidazole (EMI‐2,4), were investigated by Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry. Cure kinetics was evaluated using the multiple heating rate Kissinger method. The reactivities of the three curing agents were compared based on kinetics results obtained by DSC. FTIR spectra of these curing systems were also studied. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

Characterization of unsaturated polyester resin cured with styrene

In this work, the curing kinetic of an unsaturated polyester resin, mixed with styrene as curing agent, was studied by means of diffential scanning calorimetry (DSC) and infrared (IR) spectroscopy. Investigations were made in situ during curing and post-curing periods. The enthalpy (ΔH_cop) characterizing the styrene homopolymerization and its copolymerization with the polyester chains was determined from isothermal DSC investigations. The residual enthalpy (ΔH_res) was determined from nonisothermal DSC measurements. We find that the quantity (ΔH_res + ΔH_cop) depends on the curing temperature (T_iso). Styrene homopolymerization and/or copolymerization lead to characteristic bonds modifications. The variations of the most characteristic bonds versus curing duration were studied from Fourier transform IR investigations. The data allow the determination of a relationship between transformation rate and curing duration using a time constant (τ) characteristic of each reaction involved during the liquid to solid-state transformation. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67: 695–703, 1998     

RTM成型工艺的理论研究

本文论述了ＲＴＭ成型工艺的基本原理及工艺流程。利用固化以应动力学方程和能量控制方程得出了模腔中的温度分布，并对树脂固化程度进行预测；利用Ｄａｒｃｙ定律和流体动状态的控制微分方程，导出了注模时间的理论计算公式。     

Cure behaviour of epoxy resin matrices for carbon fibre composites

The cure behaviour of two resin formulations (with high and low curing agent content respectively) of an epoxy resin system, used as matrix for carbon fibre composites, was studied through calorimetric analysis. The aim of this work is to investigate the kinetics of this specific epoxy system in order to be able to choose a proper set of processing parameters which will give good composite material properties. The shape of the conversion curves gives evidence of the differences in the cure kinetics of the two systems. Furthermore, the values of the activation energies were determined both for formulation in the conversion range where vitrification occurs, following a phenomenological approach. These values give an indication of the differences in the curing mechanisms, when varying the content of curing agent. In particular, for both systems, the same reaction represents the onset of the cure process, ie the autocatalytic epoxy ring opening through addition reaction to the primary amine. This reaction dominates the entire cure process of the epoxy formulation at high curing agent content. Conversely, in the formulations with a low curing agent content, after depletion of the primary amines, different reactions may take place (with secondary amines and hydroxyl groups), depending on the cure temperature and the resin viscosity. © 1999 Society of Chemical Industry