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Satoshi Urano, Rie Tomita and Kiyoharu Tadanaga Synthetic control of cage/network ratio of poly(methylsilsesquioxane)s for storage stability, hardness, and weather resistance of coating films Journal of Polymer Science Part A: Polymer Chemistry 51

Version of Record online: 29 OCT 2012 | DOI: 10.1002/pola.26415

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The cage/network ratio of PMSQ, having both cage structure and network structure monitored using 29Si NMR and GPC, can be controlled by altering the condensation reaction conditions. Results demonstrate that PMSQ must be designed with a larger cage/network ratio to produce good storage stability and a coating film that has good weather resistance. Additionally, PMSQ must be designed with a smaller cage/network ratio to produce a coating film having high hardness.

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