Improved thermal and mechanical properties of water-blown rigid polyurethane foams synthesized with renewable castor oil and toluene diisocyanate-based trifunctional polyols

IF 1.3 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS
Vennila Srinivasan, Sumalatha Vasam, Sankar Govindarajan
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引用次数: 0

Abstract

In this work, glycerol was chemically modified into novel toluene diisocyanate (TDI) based trifunctional polyol (NTP) by a two step process, involving the reaction of TDI with glycerol to form an isocyanate-terminated pre-polymer, followed by the reaction with glycol. A thermal and mechanical property of water-blown rigid polyurethane foam (WB-PUF) was enhanced by the partial substitution (30 & 50 wt%) of castor oil with glycerol or synthesized NTP. The effects of glycerol content and NTP on the WB-PUF properties were investigated using various characterization techniques including ATR-FTIR, TGA, SEM, compression test, and Shore-A hardness test. Notably, the introduction of NTP substitution into the formulation of WB-PUF foams had beneficial impact on the structure of materials enhancing foam density from 77 kg/m 3 to 117 kg/m 3 and also exhibited superior thermal and mechanical properties compared to those with glycerol and unmodified foams. Shore A hardness and compression strength of those foams ranged from 50 to 69.5 °Sh A and 1.88-3.28 MPa, respectively. These findings suggest potential applications of the modified WB-PUF in areas such as rigid tissue engineering.
用可再生蓖麻油和甲苯二异氰酸酯基三功能多元醇合成的水吹硬质聚氨酯泡沫的热性能和力学性能的改善
在这项工作中,通过两步工艺将甘油化学改性为新型甲苯二异氰酸酯(TDI)基三官能团多元醇(NTP),包括TDI与甘油反应形成异氰酸末端预聚物,然后与乙二醇反应。水吹硬质聚氨酯泡沫(WB-PUF)的热力学性能通过部分取代(30 &50 wt%)蓖麻油与甘油或合成NTP。通过ATR-FTIR、TGA、SEM、压缩测试和Shore-A硬度测试等多种表征技术,研究了甘油含量和NTP对WB-PUF性能的影响。值得注意的是,将NTP取代物引入到wh - puf泡沫的配方中,对材料的结构产生了有益的影响,将泡沫密度从77 kg/ m3提高到117 kg/ m3,并且与使用甘油和未改性泡沫相比,还表现出优越的热性能和机械性能。邵氏硬度为50 ~ 69.5°Sh A,抗压强度为1.88 ~ 3.28 MPa。这些发现提示了改性WB-PUF在刚性组织工程等领域的潜在应用。
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来源期刊
Cellular Polymers
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
9
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.
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