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Study of Epoxy Resin Modified by Organic Silicone in Toughness and Applied in Coating

Author: YangRui
Tutor: CaoDuanLin
School: University of North
Course: Chemical processes
Keywords: organosilyl low-molecular polymer epoxy toughness coating
CLC: TQ323.5
Type: Master's thesis
Year: 2007
Downloads: 757
Quote: 4
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Abstract


Epoxy resin has a series of outstanding performances, as the matrix of the polymerresistible erosion coating, its application becomes more and more extensive; the organicsilicone has good toughness,the research on toughness of epoxy resin modified by organicsilicone has high value in the field of practice and theory.In this research, organosilyl low-molecular polymer which had active functional groupwas synthesized. At the base of that, receiving the modified resin,the organosilyl lowmolecu-lar polymer and epoxy resin were copolymerized, also, coating is prepared by the modifiedresin ,different quantificational pigment, filling and solidified dosages,The results showedthat the storage stability of organosilyl low-molecular polymer were good, the mechanical pr-operty of modified resin were increased, performances of coating prepared by modified resinwere good.Organosilyl low-molecular polymer including active ethyoxyl group was synthesizedfrom methltriethoxysilone,diethoxydimethlsilane,phenyltriethoxysilane and hydrochloric acidas catalyst By not a completely hydrolysis reaction. The optimized experiment results weregained by orthogonal experiment. The results show that reacting time is 2.5h, reactingtemperature is 50℃and the monomer ratios of R to Si and Ph to R are 1.4,0.2.The polymerprepared under the optimum condition performed well, it was attributed by IR, theperformance was tested, and the shear strength could reach up 2.89Mpa.Choosing the middle molecular weight epoxy resin(E-20), organosilyl low-molecularpolymer and tetrabutyl titanate as catalyst to synthesize the epoxy resin modified by silicone.Mass ratio of epoxy to organosilyl low-molecular polymer, different series 9rganosilyl low-molecularpolymer、reacting time、reacting temperature as four factors to design orthogonalexperiment. The performance and structure of copolymer were tested by infrared spectrum,DSC thermal analysis, stereocan photograph analysis. The fracture surface morphology of thesystem modified improved remarkably and the fracture surface morphology of modifiedepoxy resin was found to display tough fracture feature. Coating of epoxy-silicone resin was prepared by different modified.resin and pigment,adding quantificational pigment, filling and solidified dosages to test performance The resultsof performance measurement are good. It further indicated that the optimal mass ratio ofepoxy resin and organosilyl low-molecular polymer is 30％～40％.

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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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