Results 271 to 280 of about 305,051 (312)

Peculiarities of the Thermal Degradation of Chlorosulphonated Polyethylenes

International Journal of Polymeric Materials, 1990
Abstract A kinetic study is made of the thermal degradation of chlorosulphonated polyethylenes containing 3–40 wt% of Cl and 1.4–2.2 wt% of sulphur. It is concluded that the instability of these polymers is principally due to activation of the CHCl structures in the β-position to the [sbnd]CH2[sbnd]SO2Cl groups.
K. S. Minsker, A. M. Steklova, G. E. Zaikov   +2 more
openaire   +1 more source

Beta-Carotene: Thermal Degradation

Science, 1964
Thermal treatment of crystalline β-carotene (240°C in a vacuum) results in the formation of a volatile fraction containing chiefly aromatic hydrocarbons such as toluene, m - and p -xylene, 2,6-dimethylnaphthalene, and ionene.
openaire   +2 more sources

Thermal degradation of actinomycins to dioxopiperazines

Journal of the Chemical Society, Perkin Transactions 1, 1975
The dioxopiperazines resulting from thermal degradation of several actinomycins were identified by g.l.c. comparison with synthetic compounds, providing a convenient approach to amino-acid sequence determination. In a comparison of relative yields of various dioxopiperazines, different degradative pathways were apparent at different temperatures.
openaire   +2 more sources

Thermal degradation of polystyrene

Journal of Applied Polymer Science, 1976
AbstractThe importance of the study of thermal degradation of polymeric fuels arises from their role in the combustion of solid propellants. Estimation of the condensed‐phase heat release during combustion can be facilitated by the knowledge of the enthalpy change associated with the polymer degradation process.
Kishore, K, Verneker, VR Pai, Nair, MNR
openaire   +1 more source

Thermal degradation of polybenzimidazopyrrolones

Journal of Analytical and Applied Pyrolysis, 1995
Abstract The thermal degradation of several polybenzimidazopyrrolones (polypyrrolones) was qualitatively and quantitatively investigated by HR Py—GC/MS. More than 16 characteristics pyrolyzates reflecting the step-ladder and spacer structures of the polymers were identified by on-line MS.
Zhong Jiang, Xigao Jin, Xuesong Gao, Wenle Zhou, Fengcai Lu, Yuanfang Luo   +5 more
openaire   +1 more source

Thermal degradation of polyethylene

Makromolekulare Chemie. Macromolecular Symposia, 1989
AbstractThermal degradation of low‐density polyethylene (LDPE) in the temperature range from 450 to 525°C has been studied using a sieve‐bottom reactor with inert gas as heat‐transferring agent bubbled through the PE melt. Temperature dependence of the degradation rate was determined.
Eduard Piiroja, Helle Lippmaa
openaire   +1 more source

The thermal degradation of a polythiolcarbamate

Journal of Polymer Science, 1960
AbstractOn pyrolysis at 300° under nitrogen the polythiolcarbamate from methylenebis(4‐phenyl isocyanate) and 1,6‐hexanedithiol decomposed into carbon dioxide, carbonyl sulfide, 6‐mercapto‐1‐hexene, tetrahydro‐2‐methyl‐1‐thiapyran, thiepane, 1,6‐hexanedithiol, and an intractable residue.
Elizabeth Dyer, D. Wendell Osborne
openaire   +1 more source

The Thermal Degradation of Pectin

Journal of the American Chemical Society, 1945
R C, MERRILL, M, WEEKS
openaire   +2 more sources

The thermal and thermal-oxidative degradation of polyformaldehyde—I. The order of reaction in thermal degradation

Polymer Science U.S.S.R., 1963
L.A. Dudina, N.S. Yenikolopyan
openaire   +1 more source

Thermal degradation kinetics study of molten polylactide based on Raman spectroscopy

Polymer Engineering and Science, 2021
Gang Jin
exaly