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Preparation of high isotactic polybutene‐1
Author(s) -
Abedi S.,
SharifiSanjani N.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001227)78:14<2533::aid-app140>3.0.co;2-u
Subject(s) - tacticity , differential scanning calorimetry , thermogravimetric analysis , polybutene , polymer chemistry , melt flow index , materials science , fourier transform infrared spectroscopy , ubbelohde viscometer , molar mass distribution , polymerization , polymer , chemistry , chemical engineering , copolymer , organic chemistry , intrinsic viscosity , composite material , physics , engineering , thermodynamics
Polymerization of butene‐1 (B‐1) was carried out with a PP‐TiCl 3 /Et 2 AlCl/methyl methacrylate (MMA) catalyst system in n ‐heptane. The influence of temperature, pressure, time and H 2 on molecular weight, isotacticity, and catalytic activity were studied by viscometry, solubility in boiling diethyl ether, and measuring the polymer produced, respectively. The structural properties of the isotactic polybutene‐1 (IPB‐1) were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and melt flow index (MFI). The molecular weight of the products can be controlled by H 2 . It was found that the catalyst showed high isotacticity and activity. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2533–2539, 2000