SHI Keyu, HOU Xin, HE Shangjin, SONG Xu, DU Zongjie, ZHANG Baolong. STUDIES OF THE PROPERTIES OF EPOXY RESIN/DICYANDIAMIDE CURING SYSTEM TOUGHED BY CHAIN-EXTENDED UREA CONTAINING FLEXIBLE SPACER. [J]. Acta Polymerica Sinica (5):582-586(2002)
DOI:
SHI Keyu, HOU Xin, HE Shangjin, SONG Xu, DU Zongjie, ZHANG Baolong. STUDIES OF THE PROPERTIES OF EPOXY RESIN/DICYANDIAMIDE CURING SYSTEM TOUGHED BY CHAIN-EXTENDED UREA CONTAINING FLEXIBLE SPACER. [J]. Acta Polymerica Sinica (5):582-586(2002)DOI:
STUDIES OF THE PROPERTIES OF EPOXY RESIN/DICYANDIAMIDE CURING SYSTEM TOUGHED BY CHAIN-EXTENDED UREA CONTAINING FLEXIBLE SPACER
A series of extended-chain ureas(Ui) containing polypropylene glycol(PPG) spacers with different molecular weight were synthesized.The reactive activity
dynamic mechanical behavior
impact property and morphology of the Ui modified E-51/dicy curing system were investigated systematically
the relationships among the dynamic mechanical behavior
impact strength and morphology were also discussed.Results show that the curing activity of modified E-51/dicy curing system was so greatly enhanced that the curing reaction peak temperature decreased from l90 to 140℃
and the apparent activation energy of curing reaction is reduced froml 145.5 kJ/mol to 70~80 kJ/mol.The impact strength of the Ui modified curing system was increased ignificantly
E-51/dicy/U1 (extended-chain area containing PPG flexible spacer with molecular weight 1000) system was 8 times higher than that of the unmodified E-51/dicy curing system
the fracture surfaces of the E-51/dicy/U1 systems displayed tough fracture feature
which is very different from that of the unmodified system.There exist two-phase microstructure for the modified curing systenm.This leads to the significant increasing in impact strength.
STUDIES ON THE PROPERTIES OF E-51/DICYANDIAMIDE SYSTEM MODIFIED WITH IMIDAZOLE-TERMINATED CHAIN-EXTENDED UREA
STUDIES ON THE PROPERTIES OF EPOXY RESIN TOUGHED BY A NOVEL REACTIVE TOUGHENING ACCELERATOR ——INVESTIGATION ON THE FRACTURE SURFACE OF THE MODIFIED CURING SYSTEM
STUDY ON PROPERTIES OF EPOXY RESIN TOUGHENED BY A FUNCTIONAL MESOMORPHIC POLYMER ——CURING REACTIVITY AND DYNAMIC MECHANICAL PROPERTIES
THE STUDY ON THE PROPERTIES OF EPOXY RESIN TOUGHED BY CHAIN-EXTENDED UREAS CONTAINING FLEXIBLE SPACERS THE STUDY ON THE PROPERTIES OF THE EPOXY RESIN/CHAIN- EXTEND EDUREAS/DICYANDIAMIDE SYSTEM
SYNTHESIS OF CATIONIC UV-CURABLE POLYSILOXANES AND PROPERTIES OF THE CURED FILMS OF THEIR COMPOSITES WITH EPOXY RESIN
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中国科学院广州化学研究所
中国科学院研究生院
Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,College of Chemistry and Molecular Engineering,Peking University