Polycarbonate composition having improved resistance to gamma-ray radiation
申请人:TEIJIN LIMITED
公开号:EP0664316A1
公开(公告)日:1995-07-26
A polycarbonate composition having improved resistance to γ-ray radiation, containing 0.01 to 10 parts by weight of a benzyl ether or benzylthioether derivative or the like. This polycarbonate resin composition is almost free from yellowing by γ-ray radiation in air or O2-free atmosphere, and is suitable for use in medical molded articles which are sterilized by γ-ray radiation.
Skeletal rearrangements on chemical ionization of dibenzyl ether and derivatives
作者:Eric E. Kingston、James S. Shannon、Vladimir Diakiw、Michael J. Lacey
DOI:10.1002/oms.1210161003
日期:1981.10
AbstractProtonated molecular ions of dibenzyl ether, formed by chemical ionization using hydrogen and isobutane as reagent gases, undergo skeletal rearrangements to lose water and formaldehyde, both in the ion source and the flight path. The rearrangements have been elucidated by deuterium labelling and chemical substitution. The water lost contains the reagent proton and an aromatic hydrogen atom, and the aromatic hydrogen atoms have been shown to be mobile prior to the reaction. It is proposed that the skeletal rearrangement for water loss is initiated by protonation on the ether oxygen atom, followed by benzyl migration. The formaldehyde lost contains benzylic hydrogen atoms exclusively, and it is proposed that the skeletal rearrangement is preceded by hydrogen rearrangement of an oxygen protonated molecular ion to a ring protonated molecular ion. Daughter ion structures are supported by comparisons of their collision induced dissociation spectra with those of isomeric ions prepared by alternative routes.
Photochemistry of benzyl sulfite
作者:Robert J. Olsen、Brad D. Maxwell、C. Allen Ridgeway
DOI:10.1021/jo00169a060
日期:1983.10
Ananthan, S.; Ganesan, K.; Pillai, C. N., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1987, vol. 26, # 6, p. 512 - 513
作者:Ananthan, S.、Ganesan, K.、Pillai, C. N.
DOI:——
日期:——
791. The relative stabilising influences of substituents on free alkyl radicals. Part III. The cleavage of monosubstituted dibenzyl ethers by Grignard reagents in the presence of cobaltous chloride