Abstract
Segmented polyurethanes (PUs) are composed of alternating sequences of soft and hard blocks. Depending on the composition of these blocks, they can exhibit properties ranging from soft elastomers to hard plastics while retaining the processing characteristics of thermoplastics. The soft blocks are typically long, flexible molecules with a glass transition temperature (Tg) below room temperature while the hard blocks have a Tg above room temperature and are composed of diisocyanate condensed with small molecule diol. Segmented PUs typically exhibit excellent nanophase separation due to the incompatibility between the soft and hard domains as well as the hydrogen bonding between polar urethane units in the hard domain. Varying degrees of nanophase separation are expected depending upon the structures of diisocyanates, soft segments, and chain extenders as well as overall material compositions.1,2
Original language | English (US) |
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Title of host publication | Materials Engineering and Sciences Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting |
Publisher | AIChE |
Pages | 605-606 |
Number of pages | 2 |
Volume | 2 |
ISBN (Electronic) | 9781510834408 |
State | Published - Jan 1 2016 |
Event | Materials Engineering and Sciences Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting - San Francisco, United States Duration: Nov 13 2016 → Nov 18 2016 |
Other
Other | Materials Engineering and Sciences Division 2016 - Core Programming Area at the 2016 AIChE Annual Meeting |
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Country | United States |
City | San Francisco |
Period | 11/13/16 → 11/18/16 |
ASJC Scopus subject areas
- Mechanics of Materials
- Materials Science(all)