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- W2067535478 abstract "Poly( l -lactide- co -succinic anhydride) networks were synthesised via the carbodiimide-mediated coupling of poly( l -lactide) (PLLA) star polymers. When 4-(dimethylamino)pyridine (DMAP) alone was used as the catalyst, gelation did not occur. However, when 4-(dimethylamino)pyridinium p -toluenesulfonate (DPTS), the salt of DMAP and p -toluenesulfonic acid (PTSA), was the catalyst, the networks obtained had gel fractions comparable to those which were reported for networks synthesised by conventional methods. Greater gel fractions and conversion of the prepolymer terminal hydroxyl groups were observed when the hydroxyl-terminated star prepolymers reacted with succinic anhydride in a one-pot procedure than when the hydroxyl-terminated star prepolymers reacted with presynthesised succinic-terminated star prepolymers. The thermal properties of the networks, glass transition temperature ( T g ), melting temperature ( T m ) and crystallinity ( X c ) were all strongly influenced by the average molecular weights between the crosslinks ( M c ¯ ). The network with the smallest M c ¯ (1400 g/mol) was amorphous and had a T g of 59 °C while the network with the largest M c ¯ (7800 g/mol) was 15% crystalline and had a T g of 56 °C." @default.
- W2067535478 created "2016-06-24" @default.
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- W2067535478 date "2010-04-01" @default.
- W2067535478 modified "2023-10-16" @default.
- W2067535478 title "Carbodiimide-mediated synthesis of poly(l-lactide)-based networks" @default.
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- W2067535478 doi "https://doi.org/10.1016/j.polymer.2010.02.009" @default.
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