NMR measurements on isotactic poly(4-methyl-1-pentene)
نویسندگان
چکیده
منابع مشابه
Microporous Membranes of Isotactic Poly(4-methyl-1-pentene) from a Melt-Extrusion Process: (II) Effects of Thermal Annealing and Stretching on Porosity
A two part study utilizing isotactic poly(4 -methyl-1-pentene) (PMP) was undertaken to investigate a three stage process (melt-extrusion/annealing/uniaxial-stretching) (MEAUS) to produce microporous films. In this report, the thermal annealing (second stage) and subsequent uniaxial-stretching (third stage) results of selected PMP films from three resins, labeled A, B & C, are discussed. From se...
متن کاملMicroporous Membranes of Isotactic Poly(4-methyl-1-pentene) from a Melt-Extrusion Process: (I) Effects of Resin Variables and Extrusion Conditions
A study utilizing isotactic poly(4-methyl-1-pentene) (PMP) was undertaken to investigate a three stage process (melt-extrusion/annealing/uniaxial-stretching) (MEAUS) employed to produce microporous films. The results of this study will be reported in the course of two papers. In this first part, three PMP resins were melt-extruded into tubular films (blowup ratio; BUR = 1), where the resins eac...
متن کاملGas Selective Properties of Poly(4-Methyl-1-Pentene) Modifed by Gas Phase Fluorination
Fluorine-containing polymers have a number of valuable physical and chemical properties, such as high chemical and heat resistance, high mechanical strength and highly selective gas separation characteristics. One of the ways to produce fluoropolymer membranes is through surface fluorination. The modifcation of commercial polymers with membrane properties, poly(4-methyl-1...
متن کاملPressure-induced structural change of intermediate-range order in poly(4-methyl-1-pentene) melt.
High-pressure in situ x-ray diffraction and specific-volume measurements on isotactic poly(4-methyl-1-pentene) melt have uncovered abrupt changes in the pressure dependence of microscopic structure as well as that of macroscopic density. The first sharp diffraction peak of the polymer melt, which is related to the intermediate-range order and is explained as resulting from the correlations betw...
متن کاملNMR relaxation measurements
The backbone dynamics of the tetrameric p53 oligomerization domain (residues 3 19-360) have been investigated by two-dimensional inverse detected heteronuclear 'H-I5N NMR spectroscopy at 500 and 600 MHz. I5N TI , TZ , and heteronuclear NOES were measured for 39 of 40 non-proline backbone NH vectors at both field strengths. The overall correlation time for the tetramer, calculated from the TI/TZ...
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ژورنال
عنوان ژورنال: Journal of Polymer Science
سال: 1962
ISSN: 0022-3832,1542-6238
DOI: 10.1002/pol.1962.1206117138