Characteristics of Heat Curable Polyorganosiloxane Coating Materials
Autor: | Doo Whan Kang, Ho-Jong Kang, Jin Hyouk Lee |
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Rok vydání: | 2015 |
Předmět: | |
Zdroj: | Polymer Korea. 39:499-505 |
ISSN: | 0379-153X |
DOI: | 10.7317/pk.2015.39.3.499 |
Popis: | Polyorganosiloxane having controlled cross-linking density and phenyl group content were prepared by di- methyldimethoxysilane (DMDMS), methyltrimethoxysilane (MTMS) and phenyltrimethoxysilane (PTMS). The effect of cross-linking density and phenyl group content on the physical properties of siloxane resin and its coated film have been invetigated. Si-NMR results confirmed that synthesized siloxane resins have equivalent D T Me T Ph structures according to applied mole ratios of DMDMS, MTMS and PTMS. Polyorganosiloxane having higher cross-linking density with high phenyl content showed the high molecular weight and increasing phenyl content resulted in higher refractive index as well as better thermal stability. Cross-linking density is more important factor than phenyl content to obtain higher pencil hardness of coated film on the glass. Our results concluded that even polyorganosiloxanes having similar siloxane struc- tures show different physical properties as function of cross-linking density and phenyl content in polyorganosiloxane. |
Databáze: | OpenAIRE |
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