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The use of commercial non-hazardous air pollutant monomers to optimize the properties of fatty acid-based resins
U.S. Government
Paperback. Books LLC, Reference Series 2011-10-03.
ISBN 9781234392994
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Publisher description
Original publisher: Aberdeen Proving Ground, MD : Army Research Laboratory, [2009] OCLC Number: (OCoLC)426123206 Subject: Air -- Pollution -- United States. Excerpt: ... molecular weight and possibly also because of the higher polarity of the methacrylate group. On the other hand, the viscosity of the vinyl ester is orders of magnitude higher than that of any of the other monomers because of its higher molecular weight, its rigid nature, and the hydrogen bonding resulting from its hydroxyl groups. Therefore, reducing the vinyl ester content should have the largest effect on the resin viscosity. SR480 had the next highest viscosity, as expected based on its high molecular weight, but has a lower viscosity than the CN151 because of its lower rigidity ( polyethylene glycol groups ) and its lack of polar hydroxyl groups. MLau had a relatively high viscosity because of its large molecular weight and the presence of the polar hydroxyl group. SR252 had a higher viscosity than SR259 likely because the higher molecular weight of SR252. The monofunctional and di-functional monomers have similar viscosities. 3.1.2 Viscosity of VE / MLau / Styrene Ternary Blends The viscosity of VE / MLau / styrene was measured at 21 ° C and was found to decrease exponentially with increasing styrene content for resins containing 55 weight-percent and 65 weight-percent VE 828 resin ( figure 4 ). VE 828, like CN151, is also a bisphenol A VE cross-linker, but has slightly lower molecular weight giving the resulting resins a lower viscosity and the polymers a slightly higher T. Styrene contents of 10 % or greater reduced the viscosity of g VE resins to the acceptable range ( < 500 cP ). Therefore, only low styrene contents are necessary, from a viscosity viewpoint. 10000 55 % VE 65 % VE 1000 ( cP ) ( 500 cP ) Viscosity 100 10 1 0 10 20 30 40 50 Styrene Content ( wt. % ) Figure 4. The viscosity of VE / MLau / styrene as a function of styrene content in the resin for resins containing 55 an
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The use of commercial non-hazardous air pollutant monomers to optimize the properties of fatty acid-based resins
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