Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 102, Issue 2, Pages 1497-1504Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/app.24423
Keywords
thermosets; renewable resources; resins; structure-property relations; mechanical properties
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Maleic anhydride modified soybean- and castor-oil-based monomers, prepared via the malination of the alcoholysis products of the oils with various polyols, such as pentaerythritol, glycerol, and bisphenol A propoxylate, were copolymerized with styrene to give hard rigid plastics. These triglyceride-based polymers exhibited a wide range of properties depending on their chemical structure. They exhibited flexural moduli in the 0.8-2.5 GPa range, flexural strength in the 32-112 MPa range, glass transition temperatures (T-g) ranging from 72 to 152 degrees C, and surface hardness values in the 77-90 D range. The polymers prepared from castor oil exhibited significantly improved modulus, strength, and T-g values when compared with soybean-oil-based polymers. These novel castor and soybean-oil-based polymers show comparable properties to those of the high-performance unsaturated polyester (UP) resins and show promise as an alternative to replace these petroleum-based materials. (c) 2006 Wiley Periodicals, Inc.
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