New Vinyl Ester Bio‐copolymers Derived from Dimer Fatty Acids: Preparation, Characterization and Properties

Abstract

Two different vinyl ester resin monomers derived from dimer fatty acids (DA), dimer fatty acids polymerized glycidyl methacrylate (DA-p-GMA) resin and maleic anhydride modified dimer fatty acids polymerized glycidyl methacrylate (MA-m-DA-p-GMA) resin were prepared via simple ring-opening and esterification. FTIR, 1 H-NMR and GPC results demonstrated that these two target products have been successfully synthesized. Moreover, DA-based vinyl ester resin-styrene copolymers with different weight ratios were also prepared by a thermal polymerization, and their mechanical, morphological and thermal properties were investigated. Mechanical tests displayed that the prepared copolymers had excellent mechanical properties, and even at a low styrene content of 30 wt%, the copolymers still had excellent flexural strength of 29.14 MPa and tensile strength of 15.99 MPa. Micromorphological investigation displayed that the copolymers had glossy and smooth impact resistance fractured surfaces, indicating distinctive fast brittle fracture features. Dynamic mechanical analysis (DMA) revealed that the copolymers' glass-transition temperatures were within a broad range from 44 to 72°C. Thermogravimetric results demonstrated that the copolymers had excellent thermal stability, as all copolymers showed a high thermal initial decomposition temperature above 390°C.

Design, preparation and characterization of novel toughened epoxy asphalt based on a vegetable oil derivative for bridge deck paving

“…It is well known that the mechanical and thermal properties of cured thermosets are very sensitive to the chemical structure nature of each component in the copolymerized system. 32 The proportion of exible long-chain structure in the copolymerized system increases with the increased PFA content, while the proportion of rigid benzene ring structure existing in MTA decreases. High content of exible longchain structure can bestow materials with low rigidity, and thus the composites have low E 0 , which is similar to the composites' mechanical properties.…”

Tung Oil-Based Unsaturated Co-ester Macromonomer for Thermosetting Polymers: Synergetic Synthesis and Copolymerization with Styrene

“…The loss of polymerizable CC bonds would probably cause a decrease in ν e of the cured TOPERMA-HEA resins according to previous studies. 6,8,17,24,25 Therefore, the effect of purification of TOPERMA-HEA on the properties of the cured polymer matrices should be considered first.…”

Improvement of Toughness and Mechanical Properties of Furfurylated Wood by Biosourced Epoxidized Soybean Oil

“…ESO, consisting of three long, flexible aliphatic chains, had a high molecular weight and low cross-link density, which drastically influenced the formation of hydrogen-bonding, van der Waals, and dipole–dipole interactions in the matrix. ESO reduced the intermolecular forces within the FA resin and the rigidity of the resin, increased its chain mobility, enhanced the FA resin flexibility, and resulted in internal plasticization, thereby enhancing the elongation of the FA–ESO thermoset (Figure b). , When the ESO concentration increased from 20 to 50 wt %, TS of the FA–ESO thermosets decreased significantly. This result was reasonable because the strength was much lower for the incorporated ESO phase than the FA.…”

“…ESO reduced the intermolecular forces within the FA resin and the rigidity of the resin, increased its chain mobility, enhanced the FA resin flexibility, and resulted in internal plasticization, thereby enhancing the elongation of the FA−ESO thermoset (Figure 9b). 42,43 When the ESO concentration increased from 20 to 50 wt %, TS of the FA−ESO thermosets decreased significantly. This result was reasonable because the strength was much lower for the incorporated ESO phase than the FA.…”