82 research outputs found
Synthesis and performance of a thermosetting resin: Acrylated epoxidized soybean oil curing with a rosinâbased acrylamide
A synthesized rosinâbased polymeric monomer, Nâdehydroabietic acrylamide (DHAâAM), was introduced into an acrylated epoxidized soybean oil (AESO)/DHAâAM system to afford a thermosetting resin through thermocuring. Different molar ratios of the thermosetting AESO/DHAâAM samples were obtained through curing in the presence of an initiator, and the curing processes of the AESO/DHAâAM systems were evaluated by differential scanning calorimetry. The structures and performances of the resulting thermosets were characterized by Fourier transform infrared spectroscopy, dynamic mechanical analysis, elemental analysis, thermogravimetric analysis, and contact angle (θ) analysis. The analyses showed that with increasing content of DHAâAM introduced into the copolymer, the storage modulus, glassâtransition temperature, thermal stability, and θ values of the cured samples all increased. Moreover, the copolymers changed from hydrophilic materials to hydrophobic materials. The results also demonstrate that the rosin acid derivatives showed comparable properties to those of reported petroleumâbased rigid compounds for the preparation of soybeanâoilâbased thermosets. The presence of DHAâAM moieties in the composite structures could expand the use of AESO into the development of heatâresistant and hydrophobic materials. Š 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44545.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/135053/1/app44545_am.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/135053/2/app44545.pd
- âŚ