Zobrazeno 1 - 10
of 37
pro vyhledávání: '"P.W. O'Sullivan"'
Autor:
Sook-Ying Ho, P.W. O'Sullivan, James H. O'Donnell, David J. Hill, Peter J. Pomery, R. W. Garrett
Publikováno v:
Radiation Physics and Chemistry (1977). 17:163-171
Homopolymers of the amino acids gly, ala, val, phe and tyr have been used as models to investigate the effect of molecular structure on the degradation of polypeptides by ionizing radiation. The main reactions were—(i) scission of the entire side c
Publikováno v:
Macromolecules. 15:960-966
The copolymerization of styrene and acrylonitrile in bulk at 60 °C has been investigated by measurement of the copolymer/comonomer composition relationship and of the monomer sequence distributions using C NMR. Alternative models for the mechanism o
Publikováno v:
Industrial & Engineering Chemistry Product Research and Development. 19:412-415
Interaction between comonomers may lead to formation of an association dimer or donor-acceptor complex, which may participate in copolymerization. Probability theory has been used to derive equations relating the copolymer composition and sequence di
Publikováno v:
Journal of Macromolecular Science: Part A - Chemistry. 21:745-756
γ-Irradiation of copolymers of ethylene with propene, 1-butene, and 1-hexene, containing from 1 to 6 alkyl short chain branches per 1000 carbon atoms, at 25°C in vacuum, produced small amounts of n-alkanes with a maximum yield for the alkane corres
Publikováno v:
Macromolecules. 17:1967-1972
The DEPT technique for the generation of CH, CH, and CH C NMR subspectra has enabled the resolution and assignment of broad and overlapping aliphatic resonances in copolymers. For styreneacrylonitrile copolymers, the CH resonances gave dyad fractions
Autor:
Mathew J. Ballard, Peter J. Pomery, Donald H. Napper, Robert G. Gilbert, P.W. O'Sullivan, James H. O'Donnell
Publikováno v:
Macromolecules. 19:1303-1308
The first results are reported for the quantitative application of ESR spectroscopy to emulsion polymerization kinetics. When this technique, in conjunction with dilatometric rate measurements, was applied to the seeded emulsion polymerization of met
Autor:
James H. O'Donnell, G. C. East, Evangelia Grespos, Kenneth J. Ivin, P.W. O'Sullivan, David J. Hill, Trevor L. Young
Publikováno v:
Die Makromolekulare Chemie, Rapid Communications. 5:489-494
Publikováno v:
Polymer. 25:569-573
The composition and triad fraction data of Ebdon (Polymer 1974, 15, 782) for the copolymerization of methyl methacrylate with chloroprene have been re-evaluated using non-linear least squares curve-fitting procedures and statistical testing of conclu
Publikováno v:
Macromolecules. 18:9-17
The mechanism of copolymerization of styrene and maleic anhydride in bulk at 60 °C has been investigated by measurements of copolymer compositions using 13C NMR and of monomer sequence distributions using DEPT pulse programs to distinguish CH2 subsp
Autor:
R. Wayne Garrett, Sook-Ying Ho, P.W. O'Sullivan, James H. O'Donnell, Peter J. Pomery, David J. Hill
Publikováno v:
Radiation Physics and Chemistry (1977). 20:351-358
Radiation chemical yields of (i) the volatile radiolysis products and (ii) the trapped free radicals from the y-radiolysis of the N-acetyl derivatives of glycine, L-valine, L-phenylalanine and L-tyrosine in the polycrystalline state have been determi