Title: Novel Bio-Based Epoxies and their Performance in Reinforced Composites
Authors: Yongning Liu, Wumin Yu, Bing Wang and Chris Adair
Abstract: New Bio-Based Epoxies and Performance
Yongning Liu, Ph.D.
5255 Virginia Avenue
North Charleston, SC 29406
Epoxy resins are widely used in the manufacture for a wide range of applications, such as adhesives, coatings, composites and moldings. However, most conventional epoxy resins are derived from petroleum sources. With the desire to move toward more environmentally friendly and sustainable “green” feedstocks, use of bio-based feedstocks to develop bio-based epoxy resins has attracted increasing attention.
Rosin and distilled tall oils (DTO) are bio-based refinery products obtained as co-product in Kraft wood pulping. In this work, a series of new bio-based epoxy resins were developed from rosin and DTO. These resins were cured with amine hardeners or anhydrides to evaluate their performance including cure properties (gel time, cure time, exothermic peak temperature at room and elevated temperatures), physical and thermal properties (tensile strength, tensile modulus, tensile elongation, Tg from dynamic mechanical analysis), and fiber reinforced composites (fiber content, flexure strength and modulus, short beam shear strength). The key features of the bio-based epoxies include outstanding glass adhesion, enhanced hydrophobicity and less water absorption, improved thermal color stability, and high tensile strength and modulus. The study shows that well balanced properties could be achieved with incorporating these bio-based epoxy resins
References: 1. Laime Vevere, Anda Fridrihsone, Mikelis Kirplusks and Ugis Cabalis. “A Review of Wood Biomass-based Fatty acid and Rosin Acids Use in Polymeric Materials.” Polymers 2020, 12, 2706. 2. ASTM Standard D570-98 (2010) e1. “Standard Test Method for Water Absorption of Plastics.” ASTM International, West Conshohocken, PA, 2010, DOI: 10.1520/D570-98R10E01. 3. ASTM Standard D638-10. “Standard Test Method for Tensile Properties of Plastics.” ASTM International, West Conshohocken, PA, 2010, DOI: 10.1520/D0638-1. 4. ASTM Standard D790-10. “Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials.” ASTM International, West Conshohocken, PA, 2010, DOI: 10.1520/D0790-10.
Conference: CAMX 2022
Publication Date: 2022/10/17
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