In Situ Fourier transform infrared spectroscopic study of the thermal degradation of isotactic poly(propylene).
The conformational change of isotactic poly(propylene) (iPP) during the thermal degradation process has been carefully studied by in situ Fourier transform infrared (FT-IR) spectroscopy. This new method of studying thermal degradation of iPP not only shows the conventional kinetic parameter information of thermal degradation such as the degradation activation energy DeltaE and the degradation factor n, which are in accord with the results of traditional thermogravimetry experiments, but also indicates that many significant molecular structure changes occur during the thermal degradation process that come from some characteristic absorption band changes of in situ FT-IR. A multivariate approach, principal components analysis (PCA), is applied to the analysis of infrared (IR) data, and the results further confirm the multi-step processes of the thermal degradation of iPP. Above all, this is a new application to polymer thermal degradation by in situ FT-IR that connects the intermediate conformational change with final results during thermal degradation.
He
Peng
P
Institute of Polymer Materials, College of Chemistry and Chemical Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
Xiao
Yan
Y
Zhang
Puming
P
Zhu
Na
N
Zhu
Xinyuan
X
Yan
Deyue
D
D000465:Algorithms; D001672:Biocompatible Materials / Q000032:analysis / Q000737:chemistry; D006358:Hot Temperature; D008422:Materials Testing / Q000379:methods*; D008968:Molecular Conformation; D015999:Multivariate Analysis; D011126:Polypropylenes / Q000032:analysis* / Q000737:chemistry*; D025341:Principal Component Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013696:Temperature
D001672:Biocompatible Materials; D011126:Polypropylenes