HE Shangjin, SHI Keyu, BAI Jie, DU Zongjie, ZHANG Baolong. STUDIES ON THE PROPERTIES OF E-51/DICYANDIAMIDE SYSTEM MODIFIED WITH IMIDAZOLE-TERMINATED CHAIN-EXTENDED UREA. [J]. Acta Polymerica Sinica (6):735-739(2001)
DOI:
HE Shangjin, SHI Keyu, BAI Jie, DU Zongjie, ZHANG Baolong. STUDIES ON THE PROPERTIES OF E-51/DICYANDIAMIDE SYSTEM MODIFIED WITH IMIDAZOLE-TERMINATED CHAIN-EXTENDED UREA. [J]. Acta Polymerica Sinica (6):735-739(2001)DOI:
STUDIES ON THE PROPERTIES OF E-51/DICYANDIAMIDE SYSTEM MODIFIED WITH IMIDAZOLE-TERMINATED CHAIN-EXTENDED UREA
A chain-extended urea(TIEU) containing flexible spacer was synthesized from polypropylene glycol PPGl000
toluenediisocyanate (TDl) and imidazole.The reactive activity
dynamic mechanical behavior
impact property and morphology of the curing systems were systematically investigated by DSC
viscoelastic spectroscopy
impact tester and SEM
respectively.Results show that the curing activity of modified E-51/dicy system was so greatly enhanced that the apparent activation energy of curing reaction is reduced from 131 kJ/mol for the unmodified system to 75~80 kJ/mol.The curing reaction mechanism of E~51/dicy system accelerated by TIEU was a little different from that of the system accelerated by imidazole.The impact stength of the curing systems modified with TIEU was 2~3 times higher than that of the unmodified system
while the glass transition temperature and modulus were little changed.and the fracture surfaces of the modified systems displayed tough fracture feature.
STUDIES OF THE PROPERTIES OF EPOXY RESIN/DICYANDIAMIDE CURING SYSTEM TOUGHED BY CHAIN-EXTENDED UREA CONTAINING FLEXIBLE SPACER
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