Results 211 to 220 of about 3,294 (264)

Radiation Chemistry of Polybutene-1

1996
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. 13C NMR shows there is also a loss of stereoregularity.
Busfield, W K, Watson, Gregory S
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2D-INADEQUATE Structural Assignment of Polybutene Oligomers

The Journal of Organic Chemistry, 1997
The structure of polybutene oligomers has been unambiguously determined using NMR techniques. We used 2D-INADEQUATE to show that the major polybutene isomer synthesized via BF(3) catalysis has the expected structure with a tert-butyl group at the beginning of the chain and the expected methylvinylidene double bond at the other end.
Charles L. Mayne, Donald C. Young, James J. Harrison   +2 more
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Crystallization, Orientation, and Solid–Solid Crystal Transition of Polybutene-1 Confined within Nanoporous Alumina

, 2020
The effect of confinement on the crystallization, crystal orientation, and polymorphic crystal transition of bulk and infiltrated polybutene-1 (PB-1) within anodic aluminum oxide (AAO) templates we...
G. Shi, Zefan Wang, Ming Wang, Guoming Liu, D. Cavallo, A. Müller, Dujing Wang   +6 more
semanticscholar   +1 more source

Differential thermal analysis of polybutene‐1

Journal of Polymer Science Part C: Polymer Symposia, 1964
AbstractThe three polymorphic forms of polybutone‐1 may be easily characterized by DTA: Form I has a DTA peak near 132°C; Form II has a peak near 118°C; and Form III has doublet peaks at 104° and 118°C. The kinetics of the room temperature transformation of Form II to Form I have been qualitatively investigated by DTA.
Bert H. Clampitt, Richard H. Hughes
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Solution history effects in polybutene-1

Journal of Macromolecular Science, Part B, 1984
Abstract The crystal structure and helical conformation of polybutene-1 crystallized from dilute solution is shown to be a function of the crystal structure before dissolution, the maximum temperature in solution attained before cooling to the crystallization temperature, and the time at that maximum temperature.
K. W. Chau, Phillip H. Geil
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Promotion of Form I′ in the Polymorph Selection of Polybutene-1 during Crystallization under High Gas/Supercritical Fluid Pressure via Enhancing Chain Mobility

, 2020
Polybutene-1 (PB-1) always crystallizes into its metastable form II when cooled from a molten state because of its lower nucleation barrier, while the stable form I exhibits superior properties com...
Yongna Qiao, Jing Liu, Jinchuan Zhao, Menglong Xu, Qing Qi, Zuolong Chen, Yongfeng Men, Chul B. Park, Patrick C. Lee   +8 more
semanticscholar   +1 more source

Study of polypropylene/polybutene blends modified by gamma irradiation and (high melt strength polypropylene)/polybutene blends

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007
Abstract It is well-known that polypropylene (PP) is difficult to process as a consequence of its linear structure. It is also known that grafting of long-chain branches on PP backbone using ionizing radiation is an effective approach to achieve high melt strength polypropylene (HMS PP).
Ademar B. Lugão, Harumi Otaguro, Duclerc Fernandes Parra, Jeferson Rodrigues Bueno, Marcelo Farrah, L.F.C.P. Lima, A. Yoshiga, B.W.H. Artel, Rodrigo Shinzato   +8 more
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Vistanex Polybutene—Rubber Blends

Rubber Chemistry and Technology, 1941
Abstract From the foregoing data on blends of Vistanex Polybutene and rubber, it is evident that these two materials complement one another. Each has properties which the other lacks, and blends of the two can be made to emphasize the more desirable properties of either one.
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Crystallization of forms I′ and form II of polybutene-1 in stretched polypropylene/polybutene-1 blends

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 ...
Yao Xu, Yaping Ma, Chenguang Liu, Yongfeng Men, Aihua He   +4 more
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The Use of Polybutene in Polyolefin Cling Film

Journal of Plastic Film & Sheeting, 1985
Polyolefin stretch films are increasingly being used to secure pallet loads. A new method of applying these films results in the films being stretched about 200 % and thus causes them to lose much of their cling property. This paper describes the effects of using polybutene additives in two types, butene-1 and octene-1, of linear low den sity ...
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