Polyester type biodegradable shape memory polymeric compounds and methods of formulating same
A memory polymer, polyester technology, applied in the field of biodegradable shape memory polymer and its preparation, can solve the problems of mechanical property attenuation, collapse, use limitation, etc., and achieve biodegradable performance, biocompatibility, deformation, etc. The effect of high recovery rate and large deformation
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specific Embodiment approach 1
[0021] Specific Embodiment 1: In this embodiment, the polyester biodegradable shape memory polymer is formed by copolymerization of sebacic acid, glycerol and diols and then cross-linked and solidified, wherein the diols are ethylene glycol, Butanediol or hexanediol, the molar ratio of glycerol to sebacic acid is 1:1, and the molar ratio of glycol to sebacic acid is 0.5-1.0:1.
[0022] The deformation of the product in this embodiment reaches 300%-400%, the deformation recovery rate exceeds 99%, the shape recovery temperature is 0-45°C, the tensile strength is 0.5-10MPa, and the degradation time is 30-300 days. The main chain of the product in this embodiment has -OH, which has good biocompatibility.
specific Embodiment approach 2
[0023] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the molar ratio of dihydric alcohol to sebacic acid is 0.6-0.9:1. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0024] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the molar ratio of dihydric alcohol to sebacic acid is 0.7-0.8:1. Others are the same as in the first embodiment.
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