Thermogravimetric curves (TGA) of pure gelatin and pure PVP. Electrospinning is a versatile and efficient technique for obtaining polymeric microfibers and nanofibers...

2010年10月8日 · Thermal degradation of PVP was performed using a Perkin Elmer TG/FTIR system which consists of a TGA Pyris 1 coupled to a FTIR 1600. Samples masses ranging from 15 to 20 mg were heated from 323 to 873 K at a rate of 10 K/min in a dry nitrogen atmosphere.

Termogravimetric analysis of PVP, performed under conditions identical to those employed for the Ru/C heating, revealed that its decomposition starts taking place at 390 °C and it is completed at...

The thermal degradation of poly(N-vinyl-2-pyrrolidone) (PVP) was studied by dynamic thermogravimetric analysis (TGA) in the range 200–600°C under nitrogen and oxygen atmospheres at various heating rates.

1993年10月15日 · The thermal degradation of poly(N-vinyl-2-pyrrolidone) (PVP) was studied by dynamic thermogravimetric analysis (TGA) in the range 200–600°C under nitrogen and oxygen atmospheres at various heating rates.

polymers by using thermogravimetric analysis (TGA) under air atmosphere. It was found that PVA and PVP films show two decomposition steps while PVA/PVP blend films show three decomposition steps except the film of the ratio (20/80) that shows four decomposition steps .It

In this paper, we prepare silver nanoparticles colloids by using polyvinyl pyrrolidone (PVP) of four different molecular weights (MW = 10000, 29000, 40000, 55000) as a protective agent, dextrose...

2017年8月2日 · The thermal study proved that PVP-protected RuNPs have good stability at high temperature. The PVP-protected RuNPs/GC show excellent electrochemical properties, which will have great prospects in the development of capacitors and other electronic devices.

1993年10月15日 · 通过动态热重分析（TGA），在氮气和氧气气氛下，以不同的加热速率，通过动态热重分析（TGA）研究了聚N-乙烯基-2-吡咯烷酮（PVP）的热降解。 降解过程的表观活化能通过动力学处理来确定，在N 2中的平均值为242 kj / mol ，而在存在氧气的情况下，可以考虑两个趋势：在相对较低的温度下（200–200 400°C）且转化度α低于0.5，我们得到的平均值为199 kj / mol，而在400-600°C的温度区间内，转化度高于0.5的E a为306 kj / mol。 在N 2中进行的等 …

2020年1月1日 · In this study, the blends of hydrophilic polymers polyvinyl pyrrolidone (PVP) and polyvinyl alcohol (PVA) were studied to find an optimal polymer matrix to host carriers in facilitated transport membranes for enhanced CO 2 separation.