A newly designed experimental apparatus has been developed to effectively depress the secondary reactions of volatiles, which are the primary products of thermal degradation of polymers. In this communication, we report that controlled thermal degradation of polystyrenes and polypropylenes leads to
Preparation and characterization of end-reactive oligomers by thermal degradation of polyisobutylene
β Scribed by Takashi Sawaguchi; Manabu Seno
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 805 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0032-3861
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## Abstract Chemical structures of a number of components of volatile oligomers including (__n__+2)βmers (__n__ β§ 0) produced by thermal degradation of polyisobutylene were systematically determined by highβresolution capillary gas chromatogaphy/mass spectrometry (GC/MS). The total ion current (TIC
The reactive end groups of nonvolatile oligomers obtained by controlled thermal degradation of poly(propylene-ran-ethylene) and poly(propylene-ran-1-butene) were determined by 1 H and 13 C NMR spectroscopy. The molar ratio of unsaturated to saturated end groups was found to be about 9:1. The average
The thermal degradation of polyisobutylene is characterized by kinetics consisting of four types of intramolecular hydrogen abstraction (back-biting) of primary (p) and tertiary (t) terminal macroradicals (Ri and R;) and the successive scission at the inner position of the main chain. This reaction