Journal article
Organic-inorganic hybrid materials: relations of thermal and mechanical properties with structures
Materials Science & Engineering C, v 6(2), pp 91-98
1998
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Two series of polymethacrylate-silica covalent hybrid materials, i.e., poly[methyl methacrylate-co-3-(trimethoxysilyl)propyl methacrylate]-silica (PMCM-SiO2) and poly(2-hydroxyethyl methacrylate)-silica (PHEMA-SiO2), have been synthesized via two different sol-gel routes. The materials are highly transparent to visible light. Rapid formation of covalent bonds between the polymer and silica components during the sol-gel reactions prevents thermodynamically induced organic-inorganic phase separation. The presence of organic components does not alter the condensations of silanol groups. When extracted with an organic solvent, compositions of the hybrid materials remained largely unchanged. Bulk density and hardness of the materials can be controlled between those of the pure silica and polymers by varying the compositions. The hardness is not significantly affected by the molecular weight of PMCM polymers. The glass transition of the polymer components in all the hybrid materials is much less pronounced than that of pure polymer, as indicated by lower Tan δ peak values and smaller changes in storage modulus. As the silica content is increased, the Tg increases for the PHEMA-SiO2 hybrids while it remains essentially the same for the PMCM-SiO2 materials. As the silica content is increased, both the storage modulus and thermal stability of the hybrids are improved.
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Details
- Title
- Organic-inorganic hybrid materials: relations of thermal and mechanical properties with structures
- Creators
- Yen Wei - Drexel UniversityDanliang Jin - Drexel UniversityChuncai Yang - Drexel UniversityMichael C. Kels - Drexel UniversityKun-Yuan Qiu - Peking University
- Publication Details
- Materials Science & Engineering C, v 6(2), pp 91-98
- Publisher
- Elsevier
- Number of pages
- 8
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000077638700003
- Scopus ID
- 2-s2.0-0032216223
- Other Identifier
- 991019168352904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary