Results 171 to 180 of about 23,452,503 (249)
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Journal of macromolecular science. Physics, 2022
Isotactic polybutene-1 (iPB-1) generally crystallizes into metastable form II upon non-isothermal crystallization from the melt. The inevitable and prolonged transition of this form to form I is a drawback of numerous iPB-1 applications.
Muhammad Kashif +5 more
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Isotactic polybutene-1 (iPB-1) generally crystallizes into metastable form II upon non-isothermal crystallization from the melt. The inevitable and prolonged transition of this form to form I is a drawback of numerous iPB-1 applications.
Muhammad Kashif +5 more
semanticscholar +1 more source
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, Glover A. Jones
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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, Richard 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 +2 more
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Zur Toxikologie von Polybuten-(1)
F�hner-Weilands Sammlung von Vergiftungsf�llen Archiv f�r Toxikologie, 1968Unter den Bedingungen eines halbjahrigen Futterversuchs (1% und 10% Gehalt) an Ratten fand sich kein Anhalt fur eine gesundheitliche Bedenklichkeit des Kunststoffs Polybuten-(1).
Arnold Loeser, Gerhard Bornmann
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Phase Transitions in Isotactic Polybutene-1
Journal of Macromolecular Science, Part B, 2019AbstractThe possibilities to influence the 4 major phase transitions of isotactic polybutene – 1 (iPB-1) and their transformation rate are described.
Kaszonyiová, Martina +2 more
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Multiple phase transitions of polybutene‐1 [PDF]
Journal of Polymer Science Part C: Polymer Symposia, 1966 AbstractMultiple phase transitions of polybutene‐1 in the form III modification have recently been the subject of discussion by a number of authors. The exact nature of the observed phenomena has remained in doubt, leading to the proposal of divergent theories.
C. Geacintov +2 more
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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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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 ...
Marion B. Rhodes +2 more
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Growth morphology of isotactic polybutene-1
European Polymer Journal, 1973Abstract Isotactic polybutene-1 has been crystallized from solution by the film formation method. Well-defined single crystals have been grown from solutions of the polymer in amyl acetate and its mixtures with n-butanol in all the three modifications by varying the concentration and crystallization temperature.
K.S. Sastry, Ravji D. Patel
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