pset4 - Problem Set 4 Issued: 03/10/06 Due: 03/17/06 100...

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20.462J/3.962J PS 4 1 of 2 9/4/06 Problem Set 4 20.462J/3.962J Issued: 03/10/06 Spring 2006 Due: 03/17/06 100 points total 1. Physically associating polymers are used as drug carriers, tissue bulking agents, and cell delivery scaffolds. a. Explain why physical hydrogels are most often formed using block copolymers, where polymer chains are made up of repeating stretches of monomers which can take part in physical cross-links. b. (15 points) For the 3 types of gels described below, provide the following 3 pieces of information: (A) State what type of polymer functional groups would be used to create physical gels with the described properties, (B) give one specific example of such a functional group, showing how it forms physical crosslinks, and (C) state how that functional group or groups provide the desired behavior: i. Gels that are stable at reduced temperatures but dissolve at elevated temperature. ii.
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pset4 - Problem Set 4 Issued: 03/10/06 Due: 03/17/06 100...

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