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首页> 外文期刊>Polymer Composites >Biocomposites based on cellulose and starch modified urea-formaldehyde resin: Hydrolytic, thermal, and radiation stability
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Biocomposites based on cellulose and starch modified urea-formaldehyde resin: Hydrolytic, thermal, and radiation stability

机译：基于纤维素和淀粉改性脲醛树脂的生物复合材料：水解，热和辐射稳定性

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Two biocomposites based on cellulose (UFC) and starch modified urea formaldehyde (UFS) resin (F/U ratio of 0.8) were synthesized using the same procedure. The hydrolitical, thermal, and radiation stability of biocomposites are determined. Also, released formaldehyde during the acid hydrolysis is determined. Biocomposites based on modified UF resin have been irradiated with (50 kGy). Cellulose modified UF resin after gamma-radiation has 1.38% released formaldehyde; unmodified UF resin has 2.21% released formaldehyde. Thermal stability of biocomposites is determined using nonisothermal thermogravimetric analysis, differential thermal gravimetry (DTG), and differential thermal analysis with IR spectroscopy. Moving the DTG peak to higher temperatures indicates an increased thermal stability of cellulose modified UF resin, which is confirmed by the FTIR analysis. Gamma radiation most often causes a decrease in the intensity of the peaks in the FTIR spectrum. POLYM. COMPOS., 40:1287-1294, 2019. (c) 2018 Society of Plastics Engineers
机译：使用相同的方法合成基于纤维素（UFC）和淀粉改性脲甲醛（F / U比为0.8）的两种生物复合材料。确定生物复合材料的水性，热和辐射稳定性。而且，测定酸水解过程中释放的甲醛。基于改性的UF树脂的生物复合物用（50kGy）照射。 γ-辐射后纤维素改性的UF树脂具有1.38％释放甲醛;未改性的UF树脂具有2.21％释放的甲醛。使用非偏离热重分析，差分热重量（DTG）和IR光谱法测定生物复合材料的热稳定性。将DTG峰移动到较高温度表示通过FTIR分析确认的纤维素改性UF树脂的热稳定性增加。 γ辐射最常导致FTIR光谱中峰的强度降低。聚合物。 Compos。，40：1287-1294,2019。（c）2018塑料工程师协会

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