Pyrolysis kinetics character of phenol-formaldehyde resin
Non-isothermal Pyrolysis kinetics phenol-formaldehyde（PF) resin is investigated using thermogravimetry（TG). The TG experiments at controlled heating rates were used for obtaining the kinetic parameters of the reactive system. The research indicates that the pyrolysis process consists of four consecutive distinct stages. The anterior two stages are named as one-dimensional diffusion and three-dimensional reaction regions，while the third stage is characterized as a random nucleation and its subsequent growth，and the latest one can be defined as a chemical reaction region. According to the calculation results of the apparent activation energy Ea，the changes of entropy △S≠，enthalpy △H≠and Gibbs free energy △G≠，the anterior three stages are non-spontaneous processes. While the fourth stage proceeds spontaneously.
Kinetics Phenol-formaldehyde Pyrolysis Thermogravimetry
JIANG Hai-yun WANG Ji-gang WU Shen-qing
School of Materials Science and Engineering, Southeast University,Nanjing 211189, China School of Ma School of Materials Science and Engineering, Southeast University,Nanjing 211189, China
国内会议
南京
英文
27-34
2008-10-18（万方平台首次上网日期，不代表论文的发表时间）