Post polymerization cure shape memory polymers
First Claim
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1. A polymer composition comprising a polymer:
- (a) having shape memory properties and crosslinkable sites substantially regularly spaced from each other, (b) which comprises at least one of a hack bone and a side chain having an electron withdrawing group with alpha and beta positions, a methyne carbon in the alpha position, and an unsaturated carbon-carbon double bond in the beta position, and (c) which may be formed into a shape and then crosslinked to form a thermoset polymer having shape memory properties, wherein the polymer is a polyurethane.
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Abstract
This invention relates to chemical polymer compositions, methods of synthesis, and fabrication methods for devices regarding polymers capable of displaying shape memory behavior (SMPs) and which can first be polymerized to a linear or branched polymeric structure, having thermoplastic properties, subsequently processed into a device through processes typical of polymer melts, solutions, and dispersions and then crossed linked to a shape memory thermoset polymer retaining the processed shape.
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10 Claims
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1. A polymer composition comprising a polymer:
- (a) having shape memory properties and crosslinkable sites substantially regularly spaced from each other, (b) which comprises at least one of a hack bone and a side chain having an electron withdrawing group with alpha and beta positions, a methyne carbon in the alpha position, and an unsaturated carbon-carbon double bond in the beta position, and (c) which may be formed into a shape and then crosslinked to form a thermoset polymer having shape memory properties, wherein the polymer is a polyurethane.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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