Zobrazeno 1 - 10
of 61
pro vyhledávání: '"TADASHI IKEMURA"'
Publikováno v:
Polymer. 37:5411-5420
The formation of functional groups of non-volatile oligomers by the thermal degradation of polyisobutylene is characterized by a kinetic approach including intermolecular hydrogen abstraction of primary (p) and tertiary (t) terminal macroradicals (R
Publikováno v:
Macromolecular Chemistry and Physics. 197:215-222
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 (R p . and R t . ) and the successive β scis
Publikováno v:
Macromolecular Chemistry and Physics. 196:4139-4157
Chemical structures of a number of components of volatile oligomers including (n+2)-mers (n ≥ 0) produced by thermal degradation of polyisobutylene were systematically determined by high-resolution capillary gas chromatogaphy/mass spectrometry (GC/
Publikováno v:
Macromolecules. 28:7973-7978
It was found that α,ω-diisopropenyloligoprcpylene (M n = 3300-4800) is prepared as the nonvolatile oligomers isolated from the polymer residues resulting from the thermal degradation of isotactic polypropylene at 370 °C. Their structures were dete
Publikováno v:
Bulletin of the Chemical Society of Japan. 66:3407-3413
Polymer degradation was investigated by examining reactions with alternate daylight exposure and immersion in aqueous environments. Crosslinked polymers were produced by the carbonium ion reaction of carbonyl groups in benzenesulfonic acid aqueous so
Autor:
Tomoyuki Takesue, Yumiko Ishihara, Takeshi Kuroki, Hidesaburo Nanbu, Katsuhiko Saido, Tadashi Ikemura
Publikováno v:
Fuel. 72:1115-1119
The catalytic decomposition of polypropylene was studied. The production of gas precursors was found essential to decomposition. Attempts were made to elucidate the gas formation mechanism. The most important elementary reaction is the intramolecular
Publikováno v:
Polymer. 33:3482-3486
Gas formation mechanisms were studied in detail to find means for the selective recovery of specific components through catalytic gasification of polyethylene. Isobutene and butanes were obtained, respectively, by β-scission from chain-end tertiary
Publikováno v:
Bulletin of the Chemical Society of Japan. 64:3585-3592
Isobutane and isopentane were selectively obtained by polyethylene catalytic decomposition using the NaY-type zeolite catalyst. Back biting reactions are thus essential to gas formation during the catalytic decomposition of polyethylene. Chain-end se
Publikováno v:
Fuel. 69:978-984
Catalytic decomposition of polyethylene (PE) was carried out with a flow reactor (370 mm × 27 mm) and a batch reactor, and the results were compared to clarify the polymer decomposition process during gasification. The decomposition of PE was not fo
Publikováno v:
Polymer. 23:1091-1094
The kinetic parameters of the first stage of polystyrene degradation have been investigated to elucidate the reaction mechanisms using the flow reactor system. The decrease in molecular weight of polystyrene was recorded at minute intervals over the