Abstract
A new method for determining the extent of reaction of thermoset elastomers was developed based on equilibrium swelling and dynamic mechanical analysis (DMA). The extent of reaction was defined based on the molecular weight between crosslinks (Mc) of a polymer sample in relation to Mc at the onset of gelation and at complete reaction. The molecular weight between crosslinks was measured using equilibrium swelling, whereas rheology and DMA were used to determine the exact point of gelation and reaction completion, respectively. The extent of reaction of poly(1,8-octanediol-co-citrate) at various polymerization conditions was investigated and this method was used to study the relationship between mechanical properties, molecular weight between crosslinks, and extent of reaction.
Original language | English (US) |
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Pages (from-to) | 1318-1328 |
Number of pages | 11 |
Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
Volume | 46 |
Issue number | 4 |
DOIs | |
State | Published - Feb 15 2008 |
Keywords
- Dynamic mechanical analysis
- Elastomers
- Extent of reaction
- Gelation
- Rheology
- Thermosets
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry