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Citation: SHI Hong-E, TAN Xiao-Ming, HU Yuan-Qiang, Xu Yan. Thermal Decomposition of Interpenetrating Polymer Networks from Castor Oil-Based TDI Polyurethane[J]. Chinese Journal of Applied Chemistry, ;2008, 25(3): 369-371. shu

Thermal Decomposition of Interpenetrating Polymer Networks from Castor Oil-Based TDI Polyurethane

1.
Department of Chemistry, Xiaogan University, Xiaogan 432100

Corresponding author: TAN Xiao-Ming,
Received Date: 1 April 2007
Available Online: 2 July 2007
Fund Project: 湖北省科技攻关项目(2005101AAC64) (2005101AAC64)

Three kinds of interpenetrating polymer networks(CO-TDI/St,CO-TDI/AN,CO-TDI/MMA) were synthesized by a stepwise reaction of castor oil(CO) with 2,4-Toluene diisocyanate(TDI),crosslinking agent phenylethylene(St),Acrylonitrile(AN),methyl methacrylate(MMA).Thermal stability of IPN and its decomposition products were studied by differential scaning calorimetry(DSC),thermogravimetric analysis(TG) and FTIR-TG.The results show the IPN degeneration is a fractional process during heating.The decomposition of the polyurethane network probably took place between 240~330℃.The decomposition of the polyolefine network probably took place between 330~390℃.The later period decomposition of the polymer took place approximately at 390~500℃.The decomposition products of the polyurethane network were mainly CO₂,H₂O,isocyanate,alcohol and so on.The decomposition products of polyolefin network mainly formed the alkene,paraffins.In the decomposition products of the later period of polymer did not includes CO₂ and H₂O.The system composition had influence on the IPN thermal stability.In three kinds of IPNs,CO-TDI/AN thermal stability is best,the decomposition enthalpy variable and speed of CO-TDI/St and CO-TDI/MMA are quite similar.
- interpenetrating polymer networks,
- castor oil,
- polyurethane,
- TDI,
- thermal stability
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