scholarly journals Corrosion/Degradation Behavior of Epoxy Resin Depend on Chemical Structure

2010 ◽  
Vol 46 (11) ◽  
pp. 423-428 ◽  
Author(s):  
Masatoshi KUBOUCHI
Keyword(s):  
Epoxy Resin ◽  
Chemical Structure ◽  
Degradation Behavior

scholarly journals The application of a phosphorus nitrogen flame retardant curing agent in epoxy resin

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 545-554 ◽  
Author(s):  
Anxin Li ◽  
Pingli Mao ◽  
Bing Liang
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Adhesive Strength ◽  
Chemical Structure ◽  
Phosphorus Content ◽  
Raw Material ◽  
Curing Agent ◽  
Thermal Degradation Behavior ◽  
Overall Performance ◽  
The Impact

AbstractIn order to improve the compatibility of flame retardant and epoxy resin, a phosphorus nitrogen flame retardant curing agent poly(p-xylylenediamine spirocyclic pentaerythritol bisphosphonate) (PPXSPB) was synthesized. FTIR, 1HNMR, and mass spectroscopy were used to identify the chemical structure of PPXSPB. Epoxy resin (E-44) and PPXSPB as the raw material, a series of thermosetting systems were prepared. The effects of PPXSPB on flame retardancy, water resistance, thermal degradation behavior, mechanical properties and the adhesive strength of EP/PPXSPB thermosets were investigated. The results show that with the increase of phosphorus content, the oxygen index and carbon residue of the system both increased significantly, and the heat release rate gradually decreased, which is of great significance in delaying the occurrence of fire. When the phosphorus content is 3.24% in EP/PPXSPB thermosets, EP-2 can successfully pass the UL94 V-0 flammability rating, the LOI value of EP-2 can reach 31.4%, the impact strength and tensile strength was 6.58 kJ/m2 and 47.10 MPa respectively, and the adhesive strength was 13.79 MPa, the system presents a good overall performance.

Effect of 120 keV proton irradiation on mass loss and chemical structure of AG-80 epoxy resin

2010 ◽  
Vol 165 (11) ◽  
pp. 857-867 ◽  
Author(s):  
Yu Gao ◽  
Sheng-Ling Jiang ◽  
Shang-Li Dong ◽  
De-Zhuang Yang
Keyword(s):  
Mass Loss ◽  
Epoxy Resin ◽  
Chemical Structure ◽  
Proton Irradiation

Photo-oxidative degradation behavior of linseed oil based epoxy resin

2017 ◽  
Vol 135 ◽  
pp. 73-84 ◽  
Author(s):  
Aurélie Dupuis ◽  
François-Xavier Perrin ◽  
Amelia Ulloa Torres ◽  
Jean-Pierre Habas ◽  
Lénaik Belec ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Linseed Oil ◽  
Oxidative Degradation ◽  
Degradation Behavior

Study of Thermal Properties of Curing of DGEBA Epoxy Resin with Hexakis-(4-Aminophenoxy)-Cyclotriphosphazene

2011 ◽  
Vol 284-286 ◽  
pp. 365-368 ◽  
Author(s):  
Jing Zhu ◽  
Yong Wu ◽  
Lei Zhao ◽  
Hong Liang Wei ◽  
Hui Juan Chu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Chemical Structure ◽  
Diglycidyl Ether ◽  
Flame Retardance ◽  
Curing Agent ◽  
Degradation Behaviors ◽  
Curing Agents

Hexakis-(4-aminophenoxy)-cyclotriphosphazene (PN-NH2) was synthesized through nucleophilic substitution of the chloride atoms of hexachlorocyclotriphosphazene (HCCP) and reduction of the nitro group, and its chemical structure was characterized. As a curing agents for commercial epoxy resin Diglycidyl ether of bisphenol-A (DGEBA) PN-NH2 was compared with conventional curing agents 4,4-diaminodiphenylsulfone(DDS) and 4,4-diaminodiphenylmethane (DDM). The thermal properties and thermal degradation behaviors of these thermosetted resins were investigated by using thermogravimetric analysis (TGA). TGA studies demonstrated that the thermal properties of the PN-NH2-containing cured epoxy resin were higher than those of others. The phosphorus-nitrogen containing curing agent can result in a great improvement of the flame retardance for their thermosetted epoxy resins.

scholarly journals The Effect of Sizing Agent of Carbon Fibre on the Interface of Electron Beam Cured Composites

2011 ◽  
Vol 20 (6) ◽  
pp. 096369351102000
Author(s):  
Jianwen Bao ◽  
Ye Li ◽  
Xiangyu Zhong ◽  
Xiangbao Chen
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Carbon Fibre ◽  
Heat Resistance ◽  
Epoxy Resin ◽  
Chemical Structure ◽  
Carbon Fibres ◽  
Composite Properties ◽  
Properties Of Composites

To understand the effect of interface on the properties of electron beam cured composites, the composition and its chemical structure of the sizing agent of carbon fibres were investigated. The results show that there are alkali groups in the sizing agent of T300 and T800 carbon fibres, and these alkali groups react with the strong proton acids that are generated by the initiator and hinder the EB curing of cationic epoxy resin matrices. The properties of the composites of T300 and T800 carbon fibres cured by EB were poor. In the composites of T700, M40 and M40J carbon fibres, the effects of the sizing agent of the carbon fibres on the EB curing and the composite properties are less than for T300 and T800. After the carbon fibres were extracted by acetone, the properties of their composites improved. In particular, the heat-resistance and mechanical properties of composites of T300 and T800 carbon fibre increased greatly.

Synthesis of Latent Curing Agent for Epoxy Resin

2010 ◽  
Vol 150-151 ◽  
pp. 988-991
Author(s):  
Xue Jun Zhang ◽  
Su Mei Kang ◽  
Zhan Qing Liu
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Chemical Structure ◽  
Epoxy Composites ◽  
Curing Agent ◽  
High Modulus ◽  
Molar Ratios ◽  
Interlaminar Shear ◽  
Modified Epoxy ◽  
Carbon Fiber Epoxy

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.

The effect of amount of hardener on degradation behavior of epoxy resin in liquids

2020 ◽  
pp. 333-337
Author(s):  
Yoshiyuki Negishi ◽  
Tetsuya Sakai ◽  
Hideki Sembokuya ◽  
Masatoshi Kubouchi ◽  
Ken Tsuda
Keyword(s):  
Epoxy Resin ◽  
Degradation Behavior
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