Results 201 to 210 of about 3,671 (259)
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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.
Enrico Beati +2 more
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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.
Enrico Beati +2 more
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Characterization of polybutenes
Journal of Applied Polymer Science, 1964To 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.
William F. Haddon +2 more
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Crystal Form Affecting DC Conductivity of Polybutene and Its Copolymer Insulation
IEEE transactions on dielectrics and electrical insulationThis article focuses on the dc conductivity mechanisms of isotactic polybutene (iPB) and polybutene-block-propylene copolymer (PBA) varying with crystal form at different temperatures (30 °C, 50 °C, 70 °C, and 90 °C) and electric fields 1–70 kV/mm).
Zhonglei Li, Zechao Yang, B. Du
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Form II to form I transition in solution-crystallized isotactic polybutene-1.
Soft MatterDifferent polymer chains in a solution or melt have different conformations with corresponding entropy at each moment, which would be confined after crystallization.
Peng Fu +4 more
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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
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Polymer Engineering & Science
In this paper, a series of novel trans‐1, 4‐polyisoprene/isotactic polybutene (TPI/iPB) in‐reactor blends were synthesized by isoprene and butene sequential two‐stage polymerization technology with spherical TiCl4/MgCl2 type Ziegler‐Natta catalyst.
Huafeng Shao +3 more
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In this paper, a series of novel trans‐1, 4‐polyisoprene/isotactic polybutene (TPI/iPB) in‐reactor blends were synthesized by isoprene and butene sequential two‐stage polymerization technology with spherical TiCl4/MgCl2 type Ziegler‐Natta catalyst.
Huafeng Shao +3 more
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The phase transition behavior of polybutene in partial melting/polybutene/polypropylene
Journal of Polymer SciencePolybutene (PB) is a typical polymer with various crystal forms: I, II, III, and I′. Among them, the mechanical properties of Form I PB is better but only Form II crystal can be obtained from the melt due to the kinetic advantage and then transform to ...
Enci Zhu +5 more
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Soft Matter, 2022
New questions and conjectures are raised on the crystal-crystal phase transition of isotactic polybutene-1 (iPB-1) containing nanofiller in the flow field. In this work, we investigate the phase transition from flow-induced oriented form II to I in iPB-1
Yuru Zhang +5 more
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New questions and conjectures are raised on the crystal-crystal phase transition of isotactic polybutene-1 (iPB-1) containing nanofiller in the flow field. In this work, we investigate the phase transition from flow-induced oriented form II to I in iPB-1
Yuru Zhang +5 more
semanticscholar +1 more source
IEEE International Conference on Dielectrics
The article primarily focuses on the impact of crystal form transformation on the breakdown and DC conductivity mechanisms of isotactic polybutene (iPB) and polybutene-block-propylene copolymer (PBA) materials. Differential scanning calorimetry (DSC) was
Zechao Yang, Zhonglei Li, B. Du
semanticscholar +1 more source
The article primarily focuses on the impact of crystal form transformation on the breakdown and DC conductivity mechanisms of isotactic polybutene (iPB) and polybutene-block-propylene copolymer (PBA) materials. Differential scanning calorimetry (DSC) was
Zechao Yang, Zhonglei Li, B. Du
semanticscholar +1 more source
, 2021
Temperature-dependent form II to I transition in isothermally crystallized low-molar-mass polybutene-1 has been investigated by means of fast scanning calorimetry.
Peiru Liu, Yongfeng Men
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Temperature-dependent form II to I transition in isothermally crystallized low-molar-mass polybutene-1 has been investigated by means of fast scanning calorimetry.
Peiru Liu, Yongfeng Men
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