In-situ FTIR Spectroscopic Study on the Conformational Change of Isotactic Polypropylene upon Heating

Chem. J. Chinese Universities ›› 2001, Vol. 22 ›› Issue (8): 1425.

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In-situ FTIR Spectroscopic Study on the Conformational Change of Isotactic Polypropylene upon Heating

ZHU Xin-Yuan¹, FANG Ya-Peng¹, LI Yong-Jin¹, YAN De-Yue¹, ZHU Pin-Fang², LU Qing-Hua²

1. Instituteof Polymer Materials, College of Chemistry and Chemical Technology, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200030, China

Received:2000-12-24 Online:2001-08-24 Published:2001-08-24

Abstract

Abstract: The experimental data obtained from fast heating FTIRspectroscopy have confirmed that a conformational change occurs at about 135 ℃ for semicrystalline iPP. Based on the results of density and WAXDmeasurements, it can be inferred that the conformational change occurring at 135 ℃ comes from the disordering of helical sequences in non-crystalline phase, which is further corroborated by the FTIRstudy on the chloride polypropylene.

Key words: Isotactic polypropylene, FTIR spectroscopy, Conformation

CLC Number:

O631

TrendMD:

ZHU Xin-Yuan, FANG Ya-Peng, LI Yong-Jin, YAN De-Yue, ZHU Pin-Fang, LU Qing-Hua. In-situ FTIR Spectroscopic Study on the Conformational Change of Isotactic Polypropylene upon Heating[J]. Chem. J. Chinese Universities, 2001, 22(8): 1425.

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In-situ FTIR Spectroscopic Study on the Conformational Change of Isotactic Polypropylene upon Heating

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