Abstract
Covalently crosslinked networks based on polypropylene glycol) bis(acetoacetate) with either neopentyl glycol diacrylate or hydroxyethyl acrylate derivatized bis(4-isocyanatocyclohexyl)methane (HMDI) were prepared utilizing the Michael addition reaction in the presence of catalytic quantities of diazabicyclo[5.4.0]undec-7-ene (DBTJ). These networks were prepared in the absence of solvent at 23 °C without the formation of byproducts. Mechanical and thermal analyses of the networks were performed utilizing DMA, tensile testing, and TGA. Tensile analysis revealed that the introduction of hydrogen-bonding urethane linkages in the diacrylate segment resulted in higher tensile strengths and elongation to break compared with nonhydrogen-bonding analogs. All crosslinked products exhibited high gel fractions and excellent thermo-mechanical properties.
Original language | English (US) |
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Pages (from-to) | 4118-4128 |
Number of pages | 11 |
Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
Volume | 45 |
Issue number | 17 |
DOIs | |
State | Published - Sep 1 2007 |
Externally published | Yes |
Keywords
- Crosslinking
- Hydrogen bond
- Mechanical properties
- Michael addition
- Thermal properties
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry