Journal
MACROMOLECULES
Volume 47, Issue 15, Pages 4864-4869Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma501142d
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Funding
- Ministry of Higher Education, Science and Technology of the Republic of Slovenia
- Slovenian Research Agency [P2-0145]
- Czech Science Foundation [P108/11/1661]
- Science Foundation of the Charles University [580214]
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The pi-conjugated micro/macroporous polyacetylene-type polyHIPE foams were synthesized for the first time by a chain-growth insertion polymerization of high internal phase emulsions (HIPEs). In the first step, the pi-conjugated polyHIPE foams were prepared by polymerization of 1,3-diethynylbenzene HIPEs using [Rh(nbd)acac] complex as a catalyst. The pi-conjugated polyHIPE foams consist of etlhynylphenyl-substituted polyene main chains which are cross-linked by the 1,3-phenylene linkers. In the second step, the foams were chemically and thermally postmodified by applying the alkyne-azide cycloaddition reaction and the solvent free solid phase hyper-cross-linking at temperature of 280 degrees C. Thus, obtained polyacetylene-type polyHIPE foams exhibit hierarchically structured micro/macroporous morphology with sizes of the macropores and interconnecting pores of 3.4 +/- 0.3 mu m (or 4.8 +/- 0.8 mu m) and 0.96 mu m (or 1.1 mu m), respectively, wherein a substantial volume of micropores is also found within the macroporous walls as revealed by the calculations from the t-plots. The BET (Brunaer-Emmett-Teller) surface area of up to 110 and 380 m(2) g(-1) was determined before and after solid phase hyper-cross-linking, respectively.
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