Journal ArticleDOI
On hexagonal phases of paraffins and polyethylenes
TLDR
In this paper, the radiation-induced hexagonal phase diagrams of irradiated polyethylenes have been studied as a function of pressure to 5 kbar, and used as a basis for comparing the radiation induced hexagonal phases with the hexagonal and pseudo-hexagonal rotator phases of n-paraffins and with disordered hexagonal (anabaric) structure formed by linear polyethylene at high pressure.About:
This article is published in Polymer.The article was published on 1985-05-01. It has received 39 citations till now. The article focuses on the topics: Hexagonal phase & Phase diagram.read more
Citations
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An approach to the formation and growth of new phases with application to polymer crystallization: effect of finite size, metastability, and Ostwald's rule of stages
TL;DR: In this paper, it is shown that a phase can appear and grow in a phase that is different from that in its state of ultimate stability, maintaining this in a metastable form when it may or may not transform into the ultimate stable state in the course of growth.
Journal ArticleDOI
Crystallization and melting behaviour of photodegraded polypropylene — I. Chemi-crystallization
M. S. Rabello,J. R. White +1 more
TL;DR: In this article, the effects of photodegradation on the crystallinity and melting behavior of isotactic polypropylene (PP) were investigated in the laboratory for periods of up to 48 weeks.
Journal ArticleDOI
Learning polymer crystallization with the aid of linear, branched and cyclic model compounds.
Goran Ungar,Xiangbing Zeng +1 more
Journal ArticleDOI
Thermotropic hexagonal phases in polymers: common features and classification.
TL;DR: In this article, columnar mesophases with hexagonal symmetry observed in polymers as flexible as polyethylene and poly(diethylsiloxane) are columnar liquid crystal.
Journal ArticleDOI
Modeling Random Methyl Branching in Ethylene/ Propylene Copolymers Using Metathesis Chemistry: Synthesis and Thermal Behavior
TL;DR: The structure of random ethylene/propylene (EP) copolymers has been modeled using step polymerization chemistry and thermal behavior studies have shown that the melting point and heat of fusion decrease as the branch content increases.
References
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Journal ArticleDOI
Nonplanar Conformers and the Phase Behavior of Solid n- Alkanes
TL;DR: In this article, the authors used differential scanning calorimetry (DSC) and infrared (IR) spectroscopy to study the solidsolid phase transitions of the odd n-alkanes n-C17H36 through n-c29H60 and found that the concentration of nonplanar conformers successively increases through each phase transition.
Journal ArticleDOI
A high‐pressure phase of polyethylene and chain‐extended growth
TL;DR: In this paper, a gasketed diamond-anvil cell was used to make optical and x-ray observations of polyethylene at high pressures and temperatures using a diamond anvil cell, which confirmed the existence of the high pressure phase previously postulated by Bassett and Turner.
Journal ArticleDOI
Radiation damage and electron microscopy of organic polymers
TL;DR: A condensed description of the fundamental processes involved in radiation damage and the effects of radiation on the physical and chemical properties of organic materials, particularly polymers, is given in this paper, where it is shown that the radiation doses received by specimens in the electron microscope are extremely high, very much greater than those used in radiation chemistry experiments.
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