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- Title
Exploration of Ideal Polymer Networks.
- Authors
Shibayama, Mitsuhiro
- Abstract
The history of exploration of ideal polymer networks is reviewed, followed by a demonstration of fabrication and applications of novel polymer networks free from defects/entanglements. The networks, we call, are Tetra-PEG gels, consisting of two types of tetra-arm poly(ethylene glycol) (PEG) prepolymers that have mutually reactive amine (Tetra-PEG-NH2) and activated ester (Tetra-PEG-NHS) terminal groups, respectively. Here NHS represents N-hydroxysuccinimide. The novelty lies in 'cross-end-coupling' of symmetrical tetra-arm PEGs having complementary end groups. Small-angle neutron scattering (SANS) results on Tetra-PEG gels, together with mechanical properties and swelling behaviors, strongly suggest that thus prepared Tetra-PEG gels are near-'ideal' polymer networks with very small fractions of defects. In order to answer the reasons why such a structure could be formed, the kinetics of gelation was investigated by IR, UV, and time-resolved rheological and SANS measurements. Furthermore, fabrication of Tetra-PEG ion gels, having good mechanical properties, is demonstrated.
- Subjects
CROSSLINKED polymers; POLYMER networks; SMALL-angle neutron scattering; VULCANIZATION; RUBBER
- Publication
Macromolecular Symposia, 2017, Vol 372, Issue 1, p7
- ISSN
1022-1360
- Publication type
Article
- DOI
10.1002/masy.201600122