Journal Article

FZJ-2015-04612

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Morphological adjustment determines the properties of cationically polymerized epoxy resins

Arnebold, A. ; Thiel, K. ; Kentzinger, E.FZJ* ; Hartwig, A. (Corresponding Author)

2015
RSC Publishing London

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Please use a persistent id in citations: doi:10.1039/C5RA03042K

Abstract: The morphological adjustment of a cationically polymerized cycloaliphatic epoxy resin is presented. For this purpose, the epoxy resin is polymerized both with a reactive poly(ε-caprolactone) (PCL-diol) and a unreactive one (PCL-diester) leading to a copolymer and a polymer alloy of different morphologies, respectively. Small-angle X-ray scattering (SAXS) shows that the formed nanostructures are the result of the reaction-induced microphase separation (RIMS) mechanism. The activated monomer mechanism (AM) proceeded faster than the activated chain end mechanism (ACE) leading to a preferred integration of PCL-diol into the epoxy network so that segregation is partially inhibited, especially for small polyester contents. It was shown that esterified PCL did not react with the epoxy resin so that it was forced to segregate greatly in the form of spherulitic domains. This was shown by STEM imaging, by the occurrence of crystallinity, as well as by enhanced glass transition temperatures compared to its comparable copolymers.

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)
2. 524 - Controlling Collective States (POF3-524) (POF3-524)
3. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
4. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Appears in the scientific report 2015

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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