Design and synthesis of a packaging polymer enhancing the sensitivity of fiber grating pressure sensor

A packaging polymer （PP-1） that can enhance the sensitivity of fiber Bragg grating （FBG） pressure sensor was designed and synthesized from hydroxyl terminated polypropylene oxide oligomers, toluene diisocyanate （TDI）, 1,4-butandiol as chain extender, catalyzer, foam agent and foam stabilizer. The testing results show that the Young＇s modulus, Poisson＇s ratio of the packaging polymer are 9.0×10^6N m^-2 and 0.49, respectively. The static pressure sensitivity of fiber optical Bragg gratings packaged by PP-1 was discussed. The theoretical pressure sensitivity of FBG packaged with the polymer cylinder is -1.73×10^-3 MPa^-1, which is 896 times of that of the bare FBG （-1.93×10^-6 MPa^-1）. And its measured pressure sensitivity is -1.10×10^-3 MPa^-1, which is 558 times of that of the bare FBG.     

淀粉基生物降解塑料的应用研究现状及发展趋势

简述了开发淀粉塑料的意义及研究发展趋势,指出含淀粉量低的填充型淀粉塑料由于其组分大部分为非降解树脂,难以符合环保要求,发展的趋势是开发含淀粉量在80%以上(其余组分均可降解)能完全降解的所谓全淀粉或基本全淀粉热塑性塑料,蒙脱土为增强相的热塑性淀粉纳米复合材料是研究的热点。