Showing papers in "Polymer in 1967"
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TL;DR: In this paper, it was shown that the complex deformation of the same data can be represented by a function of same form but with different values for the constants, which can be interpreted as the decay of the distortion with time of the removal of stress field.
2,483 citations
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TL;DR: Melting and annealing of irradiated and unirradiated polyethylene single crystals have been studied with a differential scanning calorimeter as discussed by the authors, showing that the apparent heat of fusion was substantially less than the thermodynamic value for ideal crystals.
81 citations
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TL;DR: In this paper, the intrinsic viscosity and light scattering data for fractions of the poly(styrene oxide) and for fraction of a commercial sample of poly(ethylene oxide) were reported.
57 citations
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TL;DR: In this paper, the lower critical solution temperature (LCST) in polymer solutions is discussed in terms of the Prigogine solution theory which predicts an LCST below the vapour-liquid critical temperature of the solvent (T c ).
49 citations
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TL;DR: In this paper, the degradation of polymethylmethacrylate has been investigated at different temperature ranges, ranging from 340° to 460°C, using the micropyrolysis-GLC technique.
46 citations
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TL;DR: In this article, it was shown that the degradation of poly(α-methylstyrene) (PMS) degrades at these temperatures in a kinetically simple manner, whereas the degradation varied as an inverse function of PMS molecular weight.
45 citations
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TL;DR: In this paper, a method for preparing replicas of acid-etched ABS surfaces is described, and it is concluded that orientation in the surface of injection-moulded articles is responsible for lowering the peel strength, probably by reducing the penetration of the metal plating layer into the subsurface of the polymer and hence weakening the key between the two materials.
42 citations
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TL;DR: In this article, a method is described for depositing vanadium trichloride crystals on glass surfaces, and subsequent treatment with aluminium triethyl yields a planar supported catalyst for polymerization of polyethylene.
38 citations
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TL;DR: In this article, the kinetics of polymerization and the molecular weight of polymers formed from N -vinyl carbazole (NVC) by (a ) chloranil (Ch) in nitrobenzene; (b ) tetranitromethane (TNM) in toluene; and (c ) TNM in nitrophenzene, have been studied.
37 citations
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TL;DR: The heat capacity of poly-4-methyl-pentene-1 (P4MP) has been measured from about 77° to 540°K, as a function of the thermal history imparted to the sample.
31 citations
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TL;DR: In this paper, a polystyrene containing a specific number of thermally weak links at known points along the polymer chain was prepared by an adaptation of the Szwarc ‘living’ polymer technique.
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TL;DR: In this paper, the theta temperature for the system poly α-methyl styrene-cyclohexane has been determined as 37° ± 0.5°C, which indicates that the Kurata-Yamakawa theory is valid in the vicinity of the temperature, but that in nonideal solvents the polymer is best represented by either the Peterlin or Ptitsyn-Eizner coil models.
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TL;DR: In this paper, the problem of poor reproducibility of the measurements is addressed by depositing the sample within a limited region of a ribbon filament, and supplying an initial current boost to bring the filament to the desired degradation temperature within one second.
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TL;DR: In this article, a list of synthetic crystallizable polymers for which polymorphism phenomena have been observed to date is presented and a number of experimental results are presented relating to typical cases of enantiotropy and of monotropy found among stereoregular polymers.
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TL;DR: In this paper, the principal mechanism is the abstraction of a hydrogen in position γ to the carbonyl group followed by breaking of the main polymer chain (Norrish type II mechanism).
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TL;DR: In this article, the rates of monomer evolution in polystyrene-poly(α-methylstyrene) mixtures were investigated and the nature of the links formed in the iodine coupling reaction was discussed.
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TL;DR: In this article, the intrinsic viscosity and light scattering data for fractions of poly(propylene oxide) in a theta solvent, isooctane at 50°C were reported.
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TL;DR: In this article, the second virial coefficients of polyacenaphthylene and boron trifluoride-etherate were determined in toluene at 25°C.
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TL;DR: In this paper, a technique for the fractionation of natural rubber by extraction with solvent mixtures has been established, and molecular weight distributions obtained by its application are wider than the normal distribution, ranging from M = 0.07 × 10 6 to M ⋃ 2.50 × 106, and are positively skew.
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TL;DR: In this paper, an infra-red (i.r.) and deuteration study of films of nylon 6.6 that have been melted and quenched was performed. The i.r. spectra indicated that the disorder in the quenches film increases with increasing length of time in the molten condition, and with increasing temperature of the melt.
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TL;DR: In this paper, the authors measured diffusion and solubility coefficients for hydrogen and neon in plasticized and unplasticized poly(vinylchloride) sheet, above and below the glass transition temperatures.
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TL;DR: In this paper, the deviation of the stress/strain data from the simple gaussian theory is discussed briefly in terms of the C2 constant of the Mooney equation for polyisoprene, polydimethylsiloxane and ethylene-propylene elastomers.
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TL;DR: In this article, a new computer program is used to derive integral and differential distributions as well as molecular weight averages from number to Z + 1 for polyisobutenes degraded in homogeneous, laminar-flow, shear fields.
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TL;DR: In this paper, the internal structure of high impact polystyrene was examined in an electron microscope in such a way that the detail in the structure of the individual rubber particles in the metrix is made visible.
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TL;DR: In this article, the preparation and characterization of polymers of t-butyl ethylene oxide and styrene oxide are described, and the mixture of water and zinc diethyl, having mole ratios approaching unity, is used as catalysts, and dioxan was used as solvent.
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TL;DR: In this paper, a series of structural investigations on the copolymer samples was undertaken using X-ray diffraction and infra-red spectroscopic techniques, and it was shown that the resulting copolymers exhibited a high degree of crystallinity.
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TL;DR: In this paper, the association of polyacrylonitrile molecules in dimethyl-formamide solutions containing between 30 and 40 volume per cent benzene was examined viscometrically.
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TL;DR: In this paper, the steric hindrances to rotation of polyacenaphthylene chains were estimated using the light scattering, osmotic and viscometric measurements reported in the preceding paper.