Physical Properties of Soy-Phosphate Polyol-Based Rigid Polyurethane Foams

Abstract

Water-blown rigid polyurethane (PU) foams were made from 0-50% soy-phosphate polyol (SPP) and 2-4% water as the blowing agent. The mechanical and thermal properties of these SPP-based PU foams (SPP PU foams) were investigated. SPP PU foams with higher water content had greater volume, lower density, and compressive strength. SPP PU foams with 3% water content and 20% SPP had the lowest thermal conductivity. The thermal conductivity of SPP PU foams decreased and then increased with increasing SPP percentage, resulting from the combined effects of thermal properties of the gas and solid polymer phases. Higher isocyanate density led to higher compressive strength. At the same isocyanate index, the compressive strength of some 20% SPP foams was close or similar to the control foams made from VORANOL 490.

Comparison study on the physicochemical properties of phosphate esters from epoxidised palm kernel oil and soybean oil

“…5b. It was undetected in the FTIR spectrum of PKO because of the low composition of oleic acid in 4 The moisture content of the epoxides and the phosphate esters from SBO and PKO …”

“…The vegetable oils that have been utilised for this purpose are soybean oil, canola oil, palm kernel oil, linseed oil and cottonseed oil. [2][3][4][5] Vegetable oil-based PU is comparable to synthetic PU in terms of strength. In addition, it is biodegradable.…”

“…Phosphate ester (PE) is a type of flame retardant that can be produced by acid hydrolysis of epoxidised vegetable oil in the presence of phosphoric acid (H 3 PO 4 ). 3,4,9,10 Upon contact with flame, the PE will decompose into phosphoric acid and forms a layer that prohibits the spreading of fire. Guo et al 11 have synthesised PE via ring opening of epoxidised soybean oil in the presence of H 3 PO 4 .…”

“…They discovered that H 3 PO 4 not only catalysed the reaction but also chemically involved in order to be part of the esters. 4 Many researchers focused on soybean oil because of higher composition of oleic acid in the TAG chain. Furthermore, it is the most abundant vegetable oil in the USA.…”

“…Furthermore, it is the most abundant vegetable oil in the USA. 1,3,4,9,11 Malaysia is known as one of the biggest oil palm producers in East Asia. Palm kernel oil (PKO) is one of the abundant products from oil palm tree besides palm oil.…”