- METHOD FOR MAKING A POLYMER, A POLYMER ARTICLE, A BIODEVICE, AND CYCLIC CARBONATE
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The present invention relates to a method for making a polymer wherein during ring opening polymerisation is incorporated into the polymer chain at least one cyclic (alkyl) carbonate monomer having the formula (1) wherein Y is optional and represents the residue of a sulfhydryl reacted group, X represents a functional group reactive with a sulfhydryl group, L = -[CH2]n with n = 0-10, or L =–[CH2]p-S- S-[CH2]q with p and q are 0-5 or L =–[PEG]-with PEG is a group that comprises a –[CH2CH2O]m-group with m = 1-200, and R2 is hydrogen, methyl or ethyl. Optionally a cyclic (alkyl) acryloyl carbonate, or other additional monomer may be used as comonomer. The polymer may be formed into a polymer article, such as a polymer film, such as a coating and modified and/or cross linked, to a polymer or polymer article obtainable, and to a biodevice, their use, and to the cyclic (alkyl)carbonates.
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Page/Page column 18
(2013/03/26)
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- Synthesis and polymerization of alkyl halide-functional cyclic carbonates
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To increase the diversity in functional aliphatic polycarbonates, a series of novel chloro- and bromo-functional six-membered cyclic carbonate monomers were synthesized. Despite asymmetry in the monomer functionalities, homopolymerization of the monomers afforded semicrystalline polycarbonates with a high tendency to crystallize from the melt and/or on precipitation from a THF solution. Melting points were found in the 90-105 °C or 120-155 °C range for polymers comprising methyl or ethyl moieties, respectively, in the backbone. The monomers were further copolymerized with trimethylene carbonate to form random copolymers. Even among some of these random copolymers elements of semicrystallinity were found as confirmed by melting endotherms in DSC. The results clearly show that the incorporation of alkyl halide functionalities in aliphatic polycarbonates may lead to materials with a high ability to form crystallites, even in random copolymers, likely driven by polar interactions due to the presence of the halide functionalities.
- Mindemark, Jonas,Bowden, Tim
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experimental part
p. 5716 - 5722
(2012/03/26)
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- Cyclic diphosphonates
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Phosphonate compounds of the formula STR1 wherein R is hydrogen or methyl, R1 is hydrogen, methyl or ethyl, and y is an integer from 0 to 2, are useful as flame retardants for thermoplastic polymers, especially linear thermoplastic polyesters.
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