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Synthesis, Characterization and Properties of High Performance Bio-based Epoxy Resin and Curing Agent

Author: HuangWen
Tutor: CaoQianYong；LiuXiaoQing
School: Nanchang University
Course: Organic Chemistry
Keywords: Rosin acids Maleopimaric anhydride Tung oil anhydride Maleopimaric acid glycidyl Curing agent Bio - based thermosetting resin
CLC: TQ323.5
Type: Master's thesis
Year: 2011
Downloads: 80
Quote: 0
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Abstract

Rosin is a wealth of renewable resources, the world's annual output of up to 110-150 million tons. Its rigid cyclic structure, and some of the petroleum-based comparable to the aromatic or aliphatic compound, so that it can be applied to the synthesis of some of the high-performance polymer. Rosin this renewable resource, synthesis of new bio-based thermoset materials in order to ease the pressure brought about by the growing oil crisis, in the following areas of study: 1, rosin acid and maleic anhydride as raw material, The DA reaction synthesis the high purity maleopimaric anhydride using IR, NMR, elemental analysis of its structure characterization. On this basis, respectively, maleopimaric acid anhydride and trimellitic anhydride, the epoxy resin DER 662E cured using the tester of the DMA, the mechanical properties, TGA, etc. Comparative study the modulus of the epoxy resin after curing, a glass transition temperature, pull extensor strength and other mechanical properties and heat resistance. Explore the biological maleimide pimaric acid anhydride as the epoxy resin curing agent instead of the possibility of the petroleum-based trimellitic anhydride. MPA and TMA is substantially the same as the modulus of the obtained epoxy resin after curing agent, the modulus of about 2500 MPa. However, the former has a slightly higher glass transition temperature (specifically, 127 ℃ and 121 ° C). The bending strength is not much difference of 105 ± 1 MPa, the flexural strength of the cured product of the TMA / DER 662E MPA / DER 662E of the cured product was 107 ± 2 MPa. This may be due to the MPA and the TMA in the curing of the epoxy resin DER 662E, having the same functionality (both one anhydride and one carboxyl group, the functionality of 3), the MPA phase TMA terms of its huge hydrogen phenanthrene ring structure having a larger steric hindrance effects and thus to a certain extent improve the glass transition temperature of the epoxy resin. 2, renewable resources rosin high epoxy value of the bio-based epoxy resin as raw material by synthesis of a series of reactions of the DA addition, an acid anhydride such as hydrolysis, esterification, and curing a biological group (including rosin-based and tung yl) curing epoxy resin synthesis, and the performance of the cured product of the system, through the deployment of a rosin-based curing agent (MPA) and the proportion of tung oil-based curing agent (TOA) composite can get a comprehensive performance is superb bio-based thermoset material. Although MPA cured the cured product of the rosin-based epoxy resin and tung oil acid anhydride in the modulus and the glass transition temperature has obvious advantages, but the drawback is the disadvantage of its material properties in the impact strength is also apparent, so it is necessary to be improved, thereby increasing the scope of its use. We try using different proportions of the TOA mixed MPA co-curing epoxy resin, in order to get an overall performance superior materials to meet all aspects of the application. Simply an equivalent amount of the tung oil anhydride curing rosin-based epoxy resin the modulus of elasticity of only about 900 MPa, co-cured epoxy resin were mixed with 30% and 70% (calculated) to epoxy equivalent maleopimaric acid anhydride , modulus were increased to about 1400 MPa and 2000 MPa, while the pure maleic the pimaric anhydride curing the epoxy resin of the biobased expires, the impact strength of the resultant cured product is only 1.84 kJ / m * m, respectively with a certain amount of tung oil anhydride mixed impact strength of the cured product obtained by about 75%. Current increasing scarcity of oil resources and environmental protection are growing context of the times, our goal is to take advantage of a thermosetting material of synthetic bio-based renewable resources to ease the pressure brought about by the growing oil crisis.

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polycondensation resin and plastic > Epoxy resins and plastics
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