Results 181 to 190 of about 3,294 (264)

The construction of a vibrating plate shearometer to determine the shear modulus of viscoelastic fluids [PDF]

Eelman, Richard Arnold
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Autoclave foaming and steam-chest molding of polypropylene/polybutene-1 blend bead foams and their crystallization and mechanical properties

Journal of cellular plastics (Print), 2023
Expanded polypropylene (EPP) foams have showed wide applications in our daily life, such as automotive and packaging. Usually, autoclave foaming combined with steam-chest molding is the main artwork to prepare the high-precision EPP foam products ...
X. Lan, Pengke Huang, Yunkai Chong, Fei Wu, Yaozhuo Su, Haibin Luo, Partrick C. Lee, Wenge Zheng   +7 more
semanticscholar   +1 more source

Composition analysis of polybutenes

Journal of Chromatography A, 1963
Abstract The structure and composition of polyolefins made from pure isobutylene and from isobutylene diluted with various amouts of other light olefins have been investigated. The techniques used were nuclear magnetic resonance and combined anaerobic pyrolysis and gas chromatography.
Edward M. Barrall, Roger S. Porter, Julian F. Johnson   +2 more
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Retarding crystal transitions of polybutene-1 in blends

CrysteEngComm, 2023
In this study, copolymers of 1-butene with allyltrimethylsilane (TMAS) were synthesized via rac-ethylenebis (indenyl) zirconium chloride (rac-Et(Ind)2ZrCl2)/methylaluminoxane (MAO) catalyst.
Zefen Cui, Chusng Li, Binyuan Liu, Shichun Jiang   +3 more
semanticscholar   +1 more source

Peroxidation of polybutene

Die Makromolekulare Chemie, 1963
AbstractThe autocatalytic peroxidation performed dircectly with air of linear polybutene in the absence of special initiators was studied; hydroperoxides, peroxides, “active” hydrogen, alcohols were determined by chemical methods in the oxidized product, and the ketonic carbonyls were determined qualitatively by I.R.
Giorgio Clerici, Enrico Beati, Febo Severini   +2 more
openaire   +2 more sources

Rubberlike Properties of Polybutene

Rubber Chemistry and Technology, 1940
Abstract Until the last decade the explanation of those properties for which rubber is unique was confined largely to the study of rubber itself. Duplication of these properties involved the synthesis of polymers from isoprene and its immediate homologs.
I. E. Lightbown, Per K. Frolich, W. J. Sparks, L. B. Turner, C. A. Klebsattel   +4 more
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Cohesive zone modelling of fracture in polybutene

Engineering Fracture Mechanics, 2006
Fracture properties of isotactic polybutene-1 have been investigated. Fracture tests have been conducted and relevant properties at initiation have been determined according to linear elastic fracture mechanics. Two distinct fracture mechanisms have been identified, one of them causing partial instability during crack propagation.
ANDENA, LUCA, RINK SUGAR, MARTA ELISABETH, J. G. WILLIAMS   +2 more
openaire   +3 more sources

Chain dimension and crystallization temperature affected II-I transition of isotactic polybutene-1

CrysteEngComm, 2022
Isotactic polybutene-1 (iPB-1) usually crystallizes into Form II from melt first and then spontaneously transforms into Form I that with outstanding properties.
Xiaopeng Cui, Jianxin Huo, Tongxin Lv, Cunliang Hu, Hong-fei Li, Binyuan Liu, Shichun Jiang   +6 more
semanticscholar   +1 more source

Characterization of polybutenes

Journal of Applied Polymer Science, 1964
To characterize butene polymers, rapid and precise small- and large-scale column fractionation techniques have been developed for low molecular weight pure polyisobutenes and for mixed butene polymers. Fractionation results have been used to determine molecular weight distribution curves of typical commercial butene polymers.
Julian F. Johnson, William F. Haddon, Roger S. Porter   +2 more
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Peroxidation of isotactic polybutene

Journal of Polymer Science, 1961
AbstractThe reaction of direct peroxidation at 75–90°C. and the simultaneous or successive ones of degradation of the isotactic poly‐α‐olefins are followed through analytical measurements of the total peroxide oxygen content (dialkyl peroxides + alkyl hydroperoxides) and intrinsic viscosity measurements.
F. Severini, S. Toffano, E. Beati
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