Kinetic constants for styrene polymerizationWiley - Tập 16 Số 82 - Trang 311-314 - 1955
A. V. Tobolsky, J. A. Offenbach
AbstractValues for A′ and Ctr,m for styrene polymerization between 0 and 90° are presented. These are important for accurate calculation of rates of initiation.
A study of graft copolymers. II. Viscosity and light‐scattering measurementsWiley - Tập 33 Số 126 - Trang 193-205 - 1958
J. A. Manson, L. H. Cragg
AbstractMeasurements of intrinsic viscosity and light scattering were made on fractions of polymers prepared by the redox polymerization of styrene in the presence of oxidized polystyrene or copolymers of skyrene and 4‐vinylcyclohexene‐1. For comparison, similar measurements were made on fractions of linear polystyrene. The conclusion that branching had taken place...... hiện toàn bộ
Preparation and properties of monodisperse branched polystyreneWiley - Tập 57 Số 165 - Trang 471-482 - 1962
Maurice Morton, T. E. Helminiak, S. D. Gadkary, F. Bueche
AbstractModel branched polymers have been prepared by the reaction of relatively monodisperse polystyryl lithium with silicon tetrachloride. The branched molecules have been carefully characterized by light scattering and osmotic pressure measurements. A study of the dilute solution properties of the branched molecules has confirmed the theoretical development of t...... hiện toàn bộ
Studies on the validity of the Einstein viscosity law and Stokes' law of sedimentationWiley - Tập 16 Số 81 - Trang 19-30 - 1955
P. Y. Cheng, H. K. Schachman
AbstractUltracentrifugal studies on polystyrene latex particles (PSL) in solutions of different densities prepared either from mixtures of H2O and D2O or from various concentrations of sucrose in water yielded a value, by interpolation, of 1.0520 for the density of solution in which the particles neither sediment nor float....... hiện toàn bộ
The fractionation of polyethyleneWiley - Tập 28 Số 117 - Trang 341-353 - 1958
S. W. Hawkins, Harold F. Smith
AbstractFour of the new high‐density polyethylenes and one conventional high‐pressure, low‐density polyethylene have been fractionated by a fractional solution technique. The number‐average molecular weights, infrared absorption spectra, and densities of the fractions were measured by standard techniques, modified where necessary to accommodate the low solubility o...... hiện toàn bộ
Viscosity and glass temperature relations for polymer‐diluent systemsWiley - Tập 50 Số 154 - Trang 549-556 - 1961
F. N. Kelley, F. Bueche
AbstractExpressions are derived from free volume considerations which predict the concentration dependence of viscosity and glass temperature for polymer‐diluent systems. Experimental data for several systems were examined and general agreement with theory was found over broad ranges of concentration. Particular emphasis is placed on the limited amount of informati...... hiện toàn bộ
The infrared spectrum of polyethylene terephthalate. I The effect of crystallizationWiley - Tập 38 Số 134 - Trang 479-495 - 1959
Akihisa Miyake
AbstractFilms of amorphous polyethylene terephthala were drawn and heated to various extents. Intensity change of the infrared spectral bands resulting from these treatments were followed. There are more than seven bands which change their intensities by drawing, and sixteen bands affected by heat treatment. Exactly the same changes are also observed in several aro...... hiện toàn bộ
Interfacial polycondensation. I.Wiley - Tập 40 Số 137 - Trang 289-297 - 1959
Emerson L. Wittbecker, Paul W. Morgan
AbstractInterfacial polycondensation is a rapid, irreversible polymerization at the interface between water containing one difunctional intermediate and an inert immiscible organic solvent containing a complementary difunctional reactant. It is based on the Schotten‐Baumann reaction in which acid chlorides are reacted with compounds containing active hydrogen atoms...... hiện toàn bộ