Results 91 to 100 of about 266 (146)
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Phase Transitions in Isotactic Polybutene-1
Journal of Macromolecular Science - Physics, 2019AbstractThe possibilities to influence the 4 major phase transitions of isotactic polybutene – 1 (iPB-1) and their transformation rate are described.
M Kaszonyiová, F Rybnikar
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Polymer, 2019
Abstract The influence of molecular weight on the polymorphic behavior of polybutene-1 (PB-1) in cold crystallization from PB-1/iPP (isotactic polypropylene) blend has been investigated. Twelve PB-1/iPP blend samples of 90/10 (w/w) composition were prepared from three PB-1s and four iPPs with molecular weight of 77–711 kg/mol and 12–580 kg/mol ...
Zhaohui Su
exaly +2 more sources
Abstract The influence of molecular weight on the polymorphic behavior of polybutene-1 (PB-1) in cold crystallization from PB-1/iPP (isotactic polypropylene) blend has been investigated. Twelve PB-1/iPP blend samples of 90/10 (w/w) composition were prepared from three PB-1s and four iPPs with molecular weight of 77–711 kg/mol and 12–580 kg/mol ...
Zhaohui Su
exaly +2 more sources
Polymer, 2019
Abstract In this work, the effects of orientated crystal morphology of polypropylene (PP) induced by tensile stretching on the subsequent crystallization behavior of polybutene-1 (PB-1) in the incompatible PP/PB-1 (50/50) blends were studied. When the PP/PB-1 blends were stretched at a temperature above melting temperature (Tm) of PB-1 but below the ...
Yaping Ma, Yongfeng Men, Aihua He
exaly +2 more sources
Abstract In this work, the effects of orientated crystal morphology of polypropylene (PP) induced by tensile stretching on the subsequent crystallization behavior of polybutene-1 (PB-1) in the incompatible PP/PB-1 (50/50) blends were studied. When the PP/PB-1 blends were stretched at a temperature above melting temperature (Tm) of PB-1 but below the ...
Yaping Ma, Yongfeng Men, Aihua He
exaly +2 more sources
The heat of fusion of polybutene‐1
Journal of Polymer Science Part B: Polymer Physics, 1986AbstractThrough x‐ray diffraction, the changes in the unit‐cell parameters of crystal forms I and II of polybutene‐1 were followed from room temperature to the melting point. These data were combined with the results of other measurements to computer the heats and entropies of fusion by use of the Clapeyron equation.
Howard W. Starkweather Jr. +1 more
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Spherulite deformation in polybutene‐1
Journal of Polymer Science Part B: Polymer Letters, 1963Abstract : The postulate of spherulite deformation has now been verified by direct microscopic observation. Films of polybutene-1, about 1 mil thickness, (made from samples obtained through the courtesy of Phillips Petroleum Company) were prepared by molding in a laboratory press at 150 C for 15 min at 2,000 psi pressure and then lowering the ...
K. Sasaguri, M. B. Rhodes, R. S. Stein
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Deformation of polybutene‐1 spherulites
Journal of Polymer Science Part A-2: Polymer Physics, 1967AbstractThe deformation of fresh and aged polybutene‐1 spherulitic samples has been investigated by microscopic observation, interferometry, studying macroscopic and spherulitic birefringence changes, and study of light‐scattering patterns. The spherulite deformation is not affine, the microscopic deformation ratio being less than the macroscopic ...
Rena Yang, R. S. Stein
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Crystallization and Transformation of Polybutene‐1
Journal of Macromolecular Science, Part B, 2004Abstract The isothermal crystallization and phase II → I transformation of bulk polybutene‐1 at various temperatures have been characterized by x‐ray diffraction. The crystallization rate can be increased or decreased by the addition of various solids, with sodium salicylate and talc, e.g., increasing the rate by >100% and, unexpectedly, decreasing the
M. Kaszonyiova, F. Rybnikar, P. H. Geil
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Journal of Applied Polymer Science, 2007
AbstractThe effect of polymorphism of isotactic polybutene‐1 (iPB‐1) on the peel behavior of the specific peel system low‐density polyethylene/polybutene‐1 (LDPE/iPB‐1) was investigated using wide‐angle X‐ray scattering, calorimetry, and the T‐peel test.
Michael Nase +4 more
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AbstractThe effect of polymorphism of isotactic polybutene‐1 (iPB‐1) on the peel behavior of the specific peel system low‐density polyethylene/polybutene‐1 (LDPE/iPB‐1) was investigated using wide‐angle X‐ray scattering, calorimetry, and the T‐peel test.
Michael Nase +4 more
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High pressure dilatometry on polybutene-1
Colloid and Polymer Science, 1983High pressure dilatometry is used to study the melting processes and the melt of isotactic polybutene-1. Evaluating a great number of isobaricV(T)-curves determined in the range of a few hundred bar the pressure dependence of the melting temperature is accurately determined for modifications I and II.
U. Leute, W. Dollhopf
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Deformation of polybutene-1 crystal aggregates
Journal of Macromolecular Science, Part B, 1970Abstract The plastic deformation of polybutene-1 crystals on a uniaxially drawn substrate has been studied using an electron microscope. Crystals with hexagonal morphology and crystal structure, with orthorhombic structure and with square morphology were investigated.
D. R. Morrow, A. E. Woodward
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