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The biodegradable poly(5-methyl-5-methoxycarbonyl-1,3-dioxan-2-one-co-d,l-lactide) [poly(MMTC-co-d,l-LA)] copolymers were synthesized by the ring-opening copolymerization. The results show that the yield and molecular weight of copolymers are significantly influenced by reaction conditions. The chemical structure of the resultant copolymers was characterized by FTIR, 1 H NMR and 13 ...
A series of novel reactive toughening agents defined as LCEU PEG containing both flexible chain and rigid, rod-like moiety were synthesized and used to modify the epoxy resin (E-51)/dicyandiamide (dicy) curing system. The curing reactivity, apparent activation energy E a , curing mechanism, dynamic mechanical behavior, impact strength of E-51/LCEU PEG /dicy...
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