The transport current distribution in a simple mono-core non-striated DyBCO tape in LN2 was measured by a contactless nondestructive method based on Hall probe magnetometry. Transport current was gradually increased to 150 A/cm, which is well under a critical current level of 250 A/cm. Nevertheless,
Distribution of double bonds in thermally degraded polyisobutylene
β Scribed by Takeshi Kuroki; Takashi Sawaguchi; Kazumasa Suzuki; Shoaki Ide; Tadashi Ikemura
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 479 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0032-3861
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π SIMILAR VOLUMES
## 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 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
## Abstract Headβtoβhead polyisobutylene degrades at a maximum rate at 320Β°C, a temperature about 65Β°C lower than headβtoβtail polyisobutylene. Under our conditions, headβtoβtail (the regular polyisobutylene) degrades (as do many other disubstituted vinyl monomers) to a high yield of the monomer is