Ultra low density biodegradable shape memory polymer foams with tunable physical properties
Abstract
Compositions and/or structures of degradable shape memory polymers (SMPs) ranging in form from neat/unfoamed to ultra low density materials of down to 0.005 g/cc density. These materials show controllable degradation rate, actuation temperature and breadth of transitions along with high modulus and excellent shape memory behavior. A method of m ly low density foams (up to 0.005 g/cc) via use of combined chemical and physical aking extreme blowing agents, where the physical blowing agents may be a single compound or mixtures of two or more compounds, and other related methods, including of using multiple co-blowing agents of successively higher boiling points in order to achieve a large range of densities for a fixed net chemical composition. Methods of optimization of the physical properties of the foams such as porosity, cell size and distribution, cell openness etc. of these materials, to further expand their uses and improve their performance.
Subject
C08G 18/6622A61B 17/0057
C08G 18/10
C08G 18/14
C08G 18/165
C08G 18/73
C08G 63/00
C08G 63/6852
C08G 71/04
C08J 9/00
A61B 2017/00592
A61B 2017/00606
A61B 2017/00623
C08G 2101/005
C08G 2101/0083
C08G 2230/00
C08G 2280/00
C08J 2375/06
Collections
Citation
Singhal, Pooja; Wilson, Thomas S.; Cosgriff-hernandez, Elizabeth; Maitland, Duncan J. (2017). Ultra low density biodegradable shape memory polymer foams with tunable physical properties. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /177228.