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Photoinduced thiol-...
Photoinduced thiol-ene cross-linking of globalide/ε-caprolactone copolymers : curing performance and resulting thermoset properties
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- Claudino, Mauro (author)
- KTH,Ytbehandlingsteknik
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- van der Meulen, Inge (author)
- Eindhoven University of Technology, Laboratory of Polymer Chemistry, Eindhoven, The Netherlands
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- Trey, Stacy (author)
- SP Trätek, SP Technical Research Institute of Sweden, Stockholm
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- Jonsson, Mats (author)
- KTH,Kärnkemi
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- Heise, Andreas (author)
- Eindhoven University of Technology, Laboratory of Polymer Chemistry, Eindhoven, The Netherlands
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- Johansson, Mats K. G. (author)
- KTH,Ytbehandlingsteknik
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(creator_code:org_t)
- 2011-09-09
- 2012
- English.
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In: Journal of Polymer Science Part A. - : Wiley. - 0887-624X .- 1099-0518. ; 50:1, s. 16-24
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The increasing demand for bioderived polymers led us to investigate the potential use of the macrolactone globalide in thermoset synthesis via the photoinduced thiolene reaction. A series of six lipase-catalyzed poly(globalide-caprolactone) copolyesters bearing internal main-chain unsaturations ranging from 10 to 50 and 100 mol % were successfully crosslinked in the melt with equal amounts of thiol groups from trimethylolpropane-trimercapto propionate affording fully transparent amorphous elastomeric materials with different thermal and viscoelastic properties. Three major conclusions can be drawn from this study: (i) high thiol-ene conversions (> 80%) were easily attained for all cases, while maintaining the cure behavior, and irrespective of functionality at reasonable reaction rates; (ii) parallel chain-growth homopropagation of the ene monomer is insignificant when compared with the main thiolene coupling route; and (iii) high ene-density copolymers result in much lower extracted sol fractions and high T(g) values as a result of a more dense and homogeneous crosslinked network. The thiol-ene system evaluated in this contribution serve as model example for the sustainable use of naturally occurring 1,2-disubstituted alkenes in making semisynthetic polymeric materials in high conversions with a range of properties.
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Keyword
- thiol-ene photopolymerization
- unsaturated macrolactones
- renewable resoruces
- networks
Publication and Content Type
- ref (subject category)
- art (subject category)
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