Thermal, mechanical, and morphological properties of soybean oil-based polyurethane/epoxy resin interpenetrating polymer networks (IPNs)
Thermal, mechanical, and morphological properties of soybean oil-based polyurethane/epoxy resin interpenetrating polymer networks (IPNs)
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DOI：
10.1007/s10973-014-3849-5
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发表时间：
2014-08-01
影响因子：
4.4
通讯作者：
Cheng, Rongshi
中科院分区：
文献类型：
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作者：
Jin, Hui;Zhang, Yuge;Cheng, Rongshi
以不同质量比的大豆油多元醇为原料，合成了一系列基于环氧树脂（EP）和聚氨酯（PU）预聚物的互穿聚合物网络（ipn）。采用傅里叶变换红外光谱、差示扫描量热法（DSC）、动态力学分析（DMA）、万能试验机和扫描电镜（SEM）对大豆油基PU/EP ipn的结构、热性能、阻尼性能、拉伸性能和形貌进行了表征。DSC和DMA结果表明，大豆油基PU/EP IPN的玻璃化转变温度随着PU预聚物含量的增加而降低。大豆油基PU/EP ipn的阻尼性能优于纯环氧树脂。随着PU预聚物含量的增加，PU/EP IPNs的拉伸强度和模量降低，断裂伸长率提高。SEM观察表明，在PU预聚物含量较高的PU/EP ipn中出现了相分离现象。
A series of interpenetrating polymer networks (IPNs) based on epoxy (EP) resin and polyurethane (PU) prepolymer derived from soybean oil-based polyols with different mass ratios were synthesized. The structure, thermal properties, damping properties, tensile properties, and morphology of soybean oil-based PU/EP IPNs were characterized by Fourier-transform infrared spectroscopy, differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), universal test machine, and scanning electron microscopy (SEM). DSC and DMA results show that the glass transition temperature of the soybean oil-based PU/EP IPN decreases with the increase of PU prepolymer contents. Soybean oil-based PU/EP IPNs have better damping properties than that of the pure epoxy resin. The tensile strength and modulus of PU/EP IPNs decrease, while elongation at break increases with the increase of PU prepolymer contents. SEM observations reveal that phase separation appears in PU/EP IPNs with higher PU prepolymer contents.