Aiming towards the liquefaction of paddy straw was accumulation as well as providing a technically viable route leading to preservation of the natural resources and environment, the paddy straw was chemically liquefied. Paddy straw were liquefied into bio-based polyol in the presence of castor oil and blend of castor and karanja oil as depolymerizing agent and P-Toluene sulfonic acid as catalyst. Liquefied product was characterized by chemical as well as analytical techniques. The agricultural waste base paddy straw was eventually converted into polymeric precursor (polyol) monomer with nearly 80 to 95% yield by employing 2% catalyst concentration and at optimized temperature of 180°C. Synthesized polyol can be utilized further in formulating high quality rigid polyurethane foams. The foams were characterized in terms of their physical, mechanical, thermal and morphological properties. All foams exhibit good compressive strengths and thermal stability. Thermal conductivity of foams varied between 0.012 and 0.023 Kcal/mh°C, with the lowest being of foam from liquefied (LP), making it suitable for utilization as an insulation material.

为了使稻草液化，其目的是为了积累和提供技术上可行的途径来保护自然资源和环境，因此对稻草进行了化学液化。在蓖麻油和蓖麻油和卡兰油的共混物作为解聚剂和磷的作用下，稻草被液化成生物基多元醇-甲苯磺酸作为催化剂。液化产品通过化学和分析技术进行表征。通过使用 2% 的催化剂浓度和 180°C 的优化温度，农业废弃物基础稻草最终转化为聚合前体（多元醇）单体，产率接近 80% 至 95%。合成的多元醇可进一步用于配制高质量的硬质聚氨酯泡沫。根据它们的物理、机械、热和形态特性对泡沫进行表征。所有泡沫都表现出良好的抗压强度和热稳定性。泡沫的导热系数在 0.012 到 0.023 Kcal/mh°C 之间变化，最低的是液化泡沫 (LP)，使其适合用作绝缘材料。