Kinetics of thermo-oxidative degradation of polymer blends based on polylactide

2019 ◽  
Author(s):  
M. V. Podzorova ◽  
Yu. V. Tertyshnaya ◽  
A. A. Popov ◽  
S. G. Nikolaeva
Keyword(s):  
Polymer Blends ◽  
Oxidative Degradation ◽  
Kinetics Of ◽  
Thermo Oxidative Degradation

Thermo-oxidative degradation kinetics of grafted polypropylene films

2017 ◽  
Vol 172 (11-12) ◽  
pp. 878-895 ◽  
Author(s):  
Dev K. Mandal ◽  
Haripada Bhunia ◽  
Pramod K. Bajpai ◽  
Kumar A. Dubey ◽  
Lalit Varshney ◽  
...  
Keyword(s):  
Degradation Kinetics ◽  
Oxidative Degradation ◽  
Polypropylene Films ◽  
Kinetics Of ◽  
Thermo Oxidative Degradation

Kinetics of the Thermal and Thermo-Oxidative Degradation of a Polystyrene–Clay Nanocomposite

2004 ◽  
Vol 25 (3) ◽  
pp. 498-503 ◽  
Author(s):  
Sergey Vyazovkin ◽  
Ion Dranca ◽  
Xiaowu Fan ◽  
Rigoberto Advincula
Keyword(s):  
Oxidative Degradation ◽  
Kinetics Of ◽  
Thermo Oxidative Degradation

Investigation in the kinetics of thermal and thermo-oxidative degradation of wood treated with fire-retardants and untreated wood

2020 ◽  
pp. 24-29
Author(s):  
Николай Петрович Копылов ◽  
Александр Евгеньевич Кузнецов ◽  
Елена Юрьевна Сушкина ◽  
Владимир Васильевич Яшин
Keyword(s):  
Forest Fires ◽  
Flame Retardants ◽  
Degradation Products ◽  
Cellulose Degradation ◽  
Oxidative Degradation ◽  
Fire Retardant ◽  
Untreated Wood ◽  
Fire Retardants ◽  
Kinetics Of ◽  
Thermo Oxidative Degradation

Разработана экспериментальная методика определения механизма огнезащитного действия антипиренов на основе изучения кинетики термической и термоокислительной деструкции древесины. Отработка методики проведена на антипирене MgCl (бишофит). Методика основывается на количественной оценке при термическом разложении древесины выхода продуктов деструкции: CO, CO, дымового аэрозоля. В качестве приборной базы используются хроматографы, фотометр фотоэлектрический для аэрозолей, спектрофотометр. Water with various additives is used during extinguishing forest fires. Fire-retardants are used as additives in most cases. The selection of fire-retardants depends on the level of increase in extinguishing effectiveness at their addition to water. The purpose of this work is to develop an experimental method for evaluating the fireproof effect of flame retardants solutions. This method is based on the investigation of the kinetics of thermal and thermo-oxidative degradation of treated wood with flame retardants and untreated wood. In practice, bischofite and diammonium phosphate are often used as additives. Investigations were conducted using MgCl (bischofite). The explanation of the fireproof effect of the bischofite solution is based on the study of the yield of decomposition products (CO, CO, smoke aerosol) of wood treated with fire-retardant and untreated wood. The instrument base includes chromatographs «Gasochrom 3101», «Tsvet 152», photoelectric photometer for aerosols, spectrophotometer IKS-29. Wood samples were subjected to thermal and thermo-oxidative degradation in nitrogen flow or air flow with a volume velocity of 60 ml · min. Pulse heating in the pyrolysis furnace was carried out in the temperature range from 350 to 550 °C. The significant increase in fire resistance of wood treated with fire-retardant was found as a result of researches using the proposed method. It was shown that the theory of the coating layer, thermal and gas theory of catalytic dehydration are not suitable for explaining the mechanism of fireproof action of an aqueous solution of magnesium halides. Although it is not excluded the inhibition of gas-phase oxidation of cellulose degradation products by hydrogen halides released when heating aqueous solutions of magnesium halides.

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