Materials Reports 2020, Vol. 34 Issue (Z2): 580-585 |
POLYMERS AND POLYMER MATRIX COMPOSITES |
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Effect of Polyaryl Ether Ketone(PEK-C)Containing Phenolphthalein Side Base on the Performance of Biphenyl Type Epoxy Resin |
YANG Haidong1, WANG Dezhi1,2, LI Hongfeng1, FENG Hao1, XIAO Wanbao1,2, ZHAO Liwei1, QU Chunyan1,2
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1 Institute of Petrochemistry Heilongjiang Academy of Sciences, Harbin 150080, China 2 Institute of Advanced Technology Heilongjiang Academy of Sciences, Harbin 150040, China |
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Abstract Different proportion of PEK-C (phenolphthalein polyaryl ether ketone)/biphenyl epoxy resin blends were prepared and their properties were characterized by hot melt method using biphenyl epoxy resin as main resin, PEK-C as toughening agent and 4, 4-diaminodiphenylsulfone (DDS) as curing agent. The results showed that the addition of PEK-C can significantly improve the toughness of the modified resin. When the dosage of PEK-C is 15 phr, the impact strength and KIC value of the modified resin are 26 kJ/m2 and 1.57 MPa·m0.5, respectively, increasing by 73% and 60%. When the dosage of PEK-C was 10 phr, the bending strength of the modified resin increased from 91.6 MPa to 112.5 MPa, and the bending modulus increased from 2.34 GPa to 2.39 GPa. The tensile strength decreased from 91.2 MPa to 74.6 MPa, and the tensile modulus increased from 2.85 GPa to 3.03 GPa. With the increase of PEK-C content, the thermo-weight loss temperature of 5% of the cured modified resin decreased slightly, but the influence was not significant, while the carbon residue rate of 700 ℃ was significantly higher than that of pure biphenyl epoxy resin. Through SEM observation of the cured material section, with the increase of PEK-C dosage, the cured material section changed from brittle failure to ductile failure. When PEK-C dosage was 15 phr, an obvious reverse structure appeared. With these excellent performances, the modified resin may be applied to the fields of high temperature adhesive and prepreg.
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Published: 08 January 2021
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Fund:This work was financially supported by the Heilongjiang Province Institutes Basic Application Technology Research Special Project(ZNBZ2019SH01) and Natural Science Foundation of Heilongjiang Province(JC2017015). |
About author:: Haidong Yang, research assistant, master candidate, engaged in the research and development of structural adhesives, and participated in and completed more than 10 scientific research projects.He has published more than 10 papers in academic conferences and journals at home and abroad and obtained 5 invention patents. Dezhi Wang, is an expert with special allowance from the State Council, reserve leader of Heilongjiang Provincial Leading talent echelon, and winner of Heilongjiang Provincial Outstanding Youth Fund.Engaged in the research of structural adhesives for 20 years, participated in and completed 22 national and provincial scientific research projects, among which, as the project leader, applied for and completed 10 military supporting scientific research projects, and undertook 4 national and provincial research projects respectively. The achievements have been widely applied in the field of aerospace.He has published more than 50 papers in academic conferences and journals at home and abroad and obtained 15 invention patents. |
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