酚醛泡沫以甲阶酚醛树脂为主要原料,由于其优异的保温和阻燃性能在保温领域具有广阔的应用前景.但是,酚醛泡沫在成型过程中通过酸性(催化)固化剂固化成型,金属材料与泡沫体接触时容易受到腐蚀.为了降低金属被腐蚀的可能性,在不影响酚醛泡沫其他优良性能的前提下,通过选择合适的碱性填料、用酯固化作用取代酸固化剂、合成吸酸剂等方法降低酚醛泡沫的酸性.

抗震支吊架是由锚固件、加固吊杆、抗震连接构件和斜撑组成,并与建筑结构体牢固连接的抗震支撑设施,解决了非结构构件的抗震减震问题.CJ/T 476标准是抗震支吊架的行业标准,而GB/T 37267标准是抗震支吊架的国家标准,对两者所关注的适用范围、检验项目和要求、试验方法等进行了对比解读,以帮助企业和用户掌握标准,精准定位产品.

针对厚度大于2 mm的碳纤维增强复合材料的拉伸性能,制定了试样制备和测试方法(简称A法).采用A法和GB/T 3354-2014中的制样和试验方法(简称B法),分别对厚度大于2mm的碳纤维增强复合材料进行力学性能测试,并对断口形貌和性能进行对比分析.结果表明,A法测试的碳纤维复合材料的力学性能和断口形貌均优于B法.

In order to improve the surface properties of carbon fibers and the interface properties of carbon fiber/resin composites,high modulus carbon fibers（HMCF） were treated with the polymer coating.The influence of the content of latent curing agent（LCA） in the coating layer on the carbon fiber surface properties and interface properties of carbon fiber/resin composites were studied.The results show that the polymer coating may have chemical reaction with carbon fiber or resin by IR analysis.SEM and DMTA also show polymer coating can improve the interfacical properties of carbon fiber/resin composites.The amount of LCA in the coating layer is the crucial factor to improve interfacial properties of carbon fiber/resin composites.When the content of the LCA is 20%,the interlaminar shear strength（ILSS） of the sized HMCF/epoxy resin composites is improved to 77.9 MPa,increased by 8.6% compared with that of the composites reinforced by unsized HMCF.

Novel epoxy-modified waterborne polyurethanes (EPUs) were synthesized from toluene 2,4-diisocyanate, poly(ethylene glycol) (PEG), dimethylolbutyric acid, and 2,3-epoxy-1-propanol (glycidol). The chemical structures of the EPU products were characterized by 1H-NMR and Fourier transform infrared spectroscopy. The thermal properties of the EPUs were examined by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). TGA showed that the EPUs had good thermal stability, with an initial decomposition temperature higher than 250 degrees C. DSC analysis showed that the glass-transition temperature of EPU1 was higher than that of EPU2. When the EPUs were heated above 150 degrees C, the curing reaction took place. In this study, the EPUs were used for carbon fiber sizing. The mechanical interfacial strength between the fibers and the matrix was evaluated by scanning electron microscopy (SEM) and interlaminar shear strength (ILSS) testing. The SEM images of the fracture sections of the composites proved that the interfacial adhesion between the fibers and the matrix improved after the EPU sizing treatment. The composites exhibited the highest value of ILSS after the EPU1 sizing treatment. The excellent properties of the EPUs confer it with potential applications in carbon fiber sizing. (C) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

With toluene 2, 4-diisocyanate (TDI), polyethylene glycol (PEG) and 2,3-Epoxy-1-prop -anol (glycidol) used as the raw materials, two epoxy terminated polyurethanes (EPU) was synthesized by prepolymerization and closed end. Moreover, EPU with high toughhess is chosen as a coating agent for carbon fiber with three ethylene tetramine (TETA) as curing agen. The influence of the content of crosslinking agent in the coating layer on properties of composites and the mechanism of interface toughness are investigated. The chemical structure and thermal property of the EPU were studied with FTIR, 1HNMR and TGA, respectively. It proves that the thermal stability of EPU is more stable than epoxy coating. The interlaminar shear strength (ILSS) of the sized high modulus carbon fiber/epoxy composites is improved to 71MPa, which increased by 19.4% compared with the composites reinforced by unsized high modulus carbon fiber, and DMTA show that using EPU as a new kind of polymer coating for carbon fiber is a feasible method to improve the interfacial performance of high modulus carbon fiber/epoxy composites.

A new kind of latent curing agent (LCA) for epoxy resin was synthesized by the reaction of Ethylenediamine with Butylacrylate in equal molar ratios, and the chemical structure and thermal property of the LCA were studied with FTIR and TGA, respectively. Moreover, LCA was also used to modify the epoxy sizing agent for high modulus carbon fiber. The results show that the wettability of sized carbon fiber tends to increase due to the increase of the polymer film on the surface of the carbon fiber, and interlaminar shear strength (ILSS) of the sized high modulus carbon fiber/epoxy composites is improved to 78MPa, which is increased by 8.6% compared with the composites reinforced by high modulus carbon fiber with unmodified sizing agent, indicating that using LCA modified epoxy resin as polymer coating for carbon fiber is a feasible method to improve the interfacial performance of high modulus carbon fiber/epoxy composites.