Results 11 to 20 of about 107,857,992 (124)
Mpemba effect in crystallization of polybutene-1 [PDF]
Soft Matter, 2023 The Mpemba effect and its inverse can be understood as a result of nonequilibrium thermodynamics. In polymers, changes of state are generally non-equilibrium processes.
Binyuan Liu +9 more
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Radiation chemistry of polybutene-1
, 1995 Molecular weight changes and gel content measurements of moderately isotactic polybutene-1 following gamma irradiation at ambient temperature, show that both scission and crosslinking occur with G values of 3.2 and 1.0 respectively.
Busfield, WK +5 more
core +3 more sources
Interlocking shish-kebab morphology in polybutene-1 [PDF]
Journal of Polymer Science Part B: Polymer Physics, 2002 The aim of this research was to explore the effect of shear-controlled orientation injection molding (SCORIM) on polybutene-1 (PB-1). This article describes the methods and processing conditions used for injection molding and discusses the properties of ...
Kalay, C. R., Kalay, G.
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Crystalization and transformation of polybutene-1
Journal of Macromolecular Science, Part B, 2004 Isotermní krystalizace a fázová II- I transformace za různých teplot byla zkoumána RTG difrakcí. Krystalizační rychlost může být zvýšenáa přidáním různých pevných látek jako salicilan sodný a mastek, kterí např.
Kaszonyiová, Martina +2 more
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Annealing Behavior of Isotactic Polybutene-1
Journal of Macromolecular Science: Part A - Chemistry, 1987 The annealing behavior of isotactic polybutene-1 (PB-1) has been studied by differential scanning calorimetry and wide-angle x-ray diffraction. On annealing at 110°C, PB-1 yields thick crystals melting at -140°C which are mainly of Form I. An increase in
Vasanthakumari, R, Kishore, K
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Crystallinity and Stereoregularity of Polybutene-1
Kobunshi Kagaku, 1962 X線回折による結晶化度と密度とを主としてZieglem触媒により合成したポリブテン-1について測定した。結晶化度と比容積との間に直線関係が成立することから, 結晶質と非晶質の密度の値0.950および0, 868が得られた。アイソタクチックポリブテン-1には結晶化バンドとみなしうる吸収が多数見出された。一方, 1221cm-1バンドは固態状態ではその吸光度比の値が比容積と直線関係を示すが溶融状態や溶液で消失しない。したがって固態状態で一定の熱処理をした試料について比較するときには結晶化度の尺度として使用しうると考えられる。吸光度比 (A1221/A1151) と密度 (d) との間には次の実験式が成立する。
Atsuo Nishioka, Kazuo Yanagisawa
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Polypropylene and Polybutene-1 Blends
, 2023 Tato diplomová práce se zabývá vlivem množství polybutenu-1 přidaného do polypropylenu na mechanické, zpracovatelské a optické vlastnosti směsí. Připravené směsi byly také charakterizovány pomocí diferenciální skenovací kalorimetrie a širokoúhlé ...
Rumpová, Daniela
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Validation of the poke-flow technique combined with simulations of fluid flow for determining viscosities in samples with small volumes and high viscosities [PDF]
Atmospheric Measurement Techniques, 2015 Viscosity in particles consisting of secondary organic material (SOM) has recently become an area of research focus, since information on viscosity is needed to predict the environmental impacts of SOM particles. Recently Renbaum-Wolff et al.
J. W. Grayson +3 more
doaj +1 more source
Natural weathering of polybutene-1
, 2022 Diplomová práce je zaměřena na projevy degradace materiálů homopolymerů polybutenu-1, jenž byly vystaveny povětrnostním vlivům. Změny ve struktuře byly analyzovány metodou DSC a spektroskopicky.
Mudříková, Hana
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Lamellar thickness and stretching temperature dependency of cavitation in semicrystalline polymers. [PDF]
PLoS ONE, 2014 Polybutene-1 (PB-1), a typical semicrystalline polymer, in its stable form I shows a peculiar temperature dependent strain-whitening behavior when being stretched at temperatures in between room temperature and melting temperature of the crystallites ...
Yaotao Wang +4 more
doaj +1 more source