Journal
EUROPEAN POLYMER JOURNAL
Volume 46, Issue 3, Pages 441-449Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2009.10.024
Keywords
Amphiphilic conetworks; End-linked networks; Methyl methacrylate; 2-(Dimethylamino)ethyl methacrylate; Ethylene glycol dimethacrylate; ABA triblock copolymers
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Funding
- University of Cyprus Research Committee
- Cyprus Research Promotion Foundation [PE-NEK2008/ENISX/0308/45]
- A.G. Leventis Foundation
- National Institute of Standards and Technology (NIST)
- U.S. Department of Commerce
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Amphiphilic polymer conetworks were synthesized by the end-linking of ABA triblock copolymers using optimal (minimal) amount of cross-linker in pursuit of nanoscale phase separated materials with a long-range order. Small-angle neutron scattering (SANS) was employed to investigate the structure of the conetworks in D2O. The measurements revealed single SANS correlation peaks, indicating a short-range, liquid-like order within the conetworks, similar to that observed in counterparts prepared using super-optimal amount of cross-linker. This was attributed to the relatively low molecular weight of the chains and the constraints of end-linking. Thus, a reduced loading of cross-linker did not affect the structure of the conetworks. In contrast, the conetwork structure was significantly affected by the polymer architecture at minimal cross-linker loading, with much less intense SANS correlation peaks exhibited by the BAB triblock and the statistical copolymer end-linked conetworks, and the randomly cross-linked statistical conetwork. (C) 2009 Elsevier Ltd. All rights reserved.
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