Synthesis and properties of foams from a blend of vegetable oil based polyhydroxyurethane and epoxy resin

IF 1.3 4区医学 Q4 MATERIALS SCIENCE, BIOMATERIALS

Cellular Polymers Pub Date : 2022-05-13 DOI:10.1177/02624893221101170

Z. Ahmad, P. Mahanwar

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引用次数: 1

Abstract

This article aims to highlight the synthesis of foams from a blend of hydroxyurethane of castor oil and epoxy resin. An epoxidized castor oil of 4% oxirane oxygen was first converted to cyclic carbonate of castor oil at 120°C, 1 atm CO2 pressure and then it was reacted with three different aliphatic diamines to yield amine terminated Polyhydroxyurethane (PHU). Foams were prepared in a metal mould from the blend of PHU, epoxy resin, epoxy hardener and polymethylhydrogensiloxane blowing agent which releases hydrogen gas upon reaction with amine. FTIR and 1H NMR of cyclic carbonate of castor oil and PHU of castor oil were done to confirm their chemical structures. Optical microscopy and scanning electron microscopy of foams was done to assess their cellular morphology along with DSC and TGA to evaluate their thermal properties. Both flexible and rigid type of foams were synthesised in this study. Resilience of flexible foams was inspected using a ball rebound test and compression-recovery test while thermal insulation property was checked by measuring thermal conductivity, thermal diffusivity and R-values of rigid foams from heat transfer study using a heat transfer apparatus.

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植物油基聚羟基聚氨酯与环氧树脂共混泡沫的合成及性能研究

本文旨在重点介绍由蓖麻油的羟基氨基甲酸酯和环氧树脂的混合物合成泡沫。首先在120°C、1个大气压的CO2压力下，将4%环氧乙烷氧的环氧化蓖麻油转化为蓖麻油的环状碳酸酯，然后将其与三种不同的脂肪族二胺反应，得到胺封端的聚羟基氨基甲酸酯（PHU）。在金属模具中由PHU、环氧树脂、环氧硬化剂和聚甲基氢硅氧烷发泡剂的混合物制备泡沫，该发泡剂在与胺反应时释放氢气。对蓖麻油的环状碳酸酯和蓖麻油的PHU进行了红外光谱和核磁共振氢谱分析，确定了它们的化学结构。对泡沫进行了光学显微镜和扫描电子显微镜检查以评估其细胞形态，并对DSC和TGA进行了评估以评估其热性能。本研究合成了柔性和刚性两种类型的泡沫。使用球回弹试验和压缩恢复试验检查柔性泡沫的弹性，同时通过使用传热设备测量传热研究中刚性泡沫的热导率、热扩散率和R值来检查隔热性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cellular Polymers 工程技术-材料科学：生物材料

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Cellular Polymers is concerned primarily with the science of foamed materials, the technology and state of the art for processing and fabricating, the engineering techniques and principles of the machines used to produce them economically, and their applications in varied and wide ranging uses where they are making an increasingly valuable contribution. Potential problems for the industry are also covered, including fire performance of materials, CFC-replacement technology, recycling and environmental legislation. Reviews of technical and commercial advances in the manufacturing and application technologies are also included. Cellular Polymers covers these and other related topics and also pays particular attention to the ways in which the science and technology of cellular polymers is being developed throughout the world.