Physicochemical properties and fracture behavior of soy‐based resin

Abstract

A soy-based resin was prepared by the process of transesterfication and epoxidation of regular foodgrade soybean oil. The soy-based resin was used as a reactive diluent and also as a replacement of bisA epoxy resin in an anhydride-cured polymer. The curing efficiency of soy epoxy resin was studied using differential scanning calorimetry. Physicochemical properties and fracture behavior of soy-based resin polymers were studied using dynamic mechanical analysis and fracture toughness measurements, respectively. Toughness measurements were carried out using the compact tension geometry following the principles of linear elastic fracture mechanics. Tests showed that the addition of soy-based epoxy resin to the base epon resin improved the toughness of the blend. Morphology of the fractured specimens has been analyzed by scanning electron microscopy. The soy-based resins hold great potential for environmentally friendly, renewable resource based, and low cost materials for structural applications.

Blending of Epoxidised Palm Oil with Epoxy Resin: The Effect on Morphology, Thermal and Mechanical Properties

“…1 [24,25]. This equation is applicable to a polymer network having a rubbery plateau region [26,27].…”

“…The shift of the tan d peak towards lower temperature, as a result of the incorporation of EPO in epoxy network, caused the reduction of T g of the epoxy network. The loss tangent peak is related to molecular movement of polymeric chains within the structure where a higher tan d value indicates greater mobility of polymer chains [25]. The molecular mobility increases with increasing reaction time as shown by the higher value of tan d.…”

“…30°C), v e is crosslinking density of a crosslinked polymer, R is the gas constant and T is the absolute temperature. The molar mass between crosslinking (M c ) can also be calculated using the rubber elasticity theory based on the assumption that the network structure has sufficient molar mass and degree of flexibility to exhibit rubber elasticity [25] as shown in Eq. 2. where E 0 is storage modulus in the rubbery plateau (T g ?…”

Fatty acid composition of melon (Colocynthis vulgaris Shrad) seed oil and its application in synthesis and evaluation of alkyd resins

“…The fatty acid esters derived from the triglyceride vegetable oils are an attractive source of raw materials for polymer synthesis [5]. The use of tobacco seed, rubber seed, coconut seed, soybean, palm and castor oils as a precursor for synthesis of alkyd resins has been reported [6, 7, 8, 9, 2, 10, 11, 12 and 13].…”

Development of biobased polymer/clay nanocomposites

“…However, it is also worth mentioning that their mechanical and thermal properties are worse than those of conventional polymers due to the plasticizing effect, low reactivity, and lower cross-link density at high biodegradable contents (Shabeer et al, 2007;Wang et al, 2014). According to Khot et al (2001), increasing the renewable polymer content in acrylated epoxidized soybean oil (AESO) polymers resulted in decreased tensile strength and tensile modulus when compared to standard styrene polymer.…”