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Polymer-Polymer Interdiffusion
Europhysics Letters (EPL), 1986We correct an earlier theory of polymer diffusion for a mixture of long (L) and short (S) chains in a melt, all chains being chemically identical. The mixing can be understood by analogy with the kinetics of polymer dissolution: up to a time τL (the reptation time of the L component) the L chains behave like a gel, progressively swollen by the S chains.
P. G. de Gennes, F. Brochard
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1986
Publisher Summary This chapter discusses the properties of generic polymers. Polyethylene is the commonest of thermoplastics. They are often described as linear polymers that are the chains and are not cross-linked. That is why they soften if the polymer is heated, and the secondary bonds that bind the molecules to each other melt so that it flows ...
David R.H. Jones, Michael F. Ashby
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Publisher Summary This chapter discusses the properties of generic polymers. Polyethylene is the commonest of thermoplastics. They are often described as linear polymers that are the chains and are not cross-linked. That is why they soften if the polymer is heated, and the secondary bonds that bind the molecules to each other melt so that it flows ...
David R.H. Jones, Michael F. Ashby
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Electroluminescence of a Polymer Film with a Polymer/Polymer Interface
JETP Letters, 2019The effect of a two-dimensional quantum-confined structure formed at a polymer/polymer interface on the radiative recombination of excitons (i.e., electroluminescence) is investigated. It is shown that the implementation of such a structure in a polymer film leads to an increase in the emission intensity by more than two orders of magnitude and a ...
V. M. Kornilov +5 more
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Polymer/Solvent and Polymer/Polymer Interaction Studies [PDF]
, 1979 Abstract : The technique of gas chromatography has been used to investigate the solution properties of many solvents with a propargyl (acetylene-terminated) sulfone (PATS). In this case, unlike previous work on the RADEL polysulfone, no correlation between the strength of the specific interaction parameter and the solubility as determined from beaker ...
D. T. Magnuson +4 more
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Polymer-Polymer Interdiffusion
MRS Proceedings, 1984AbstractInterdiffusion of polymer chains plays an important role in establishing good adhesion at polymer interfaces as well as in the kinetics of phase separation and mixing in polymer blends. Reptation, a process in which a given linear chain crawls along a primitive path defined by the topological constraints due to the surrounding chains, is ...
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Stratification in Drying Polymer–Polymer and Colloid–Polymer Mixtures
Langmuir, 2017Drying polymer-polymer and colloid-polymer mixtures were studied using Langevin dynamics computer simulations. Polymer-polymer mixtures vertically stratified into layers, with the shorter polymers enriched near the drying interface and the longer polymers pushed down toward the substrate.
Michael P. Howard +2 more
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Polymer-polymer interaction parameters in solvent/polymer/polymer ternary systems
European Polymer Journal, 1981Abstract Empirical equations defining the relationships between b23 and χ23 interaction parameters for the ternary systems toluene (1)/poly(dimethylsiloxane), PDMS, (2)/polystyrene, PS, (3) and benzene (1)/PDMS(2)/PS(3) have been determined. The dependences of both interaction parameters on the mean molecular weights of the macromolecular components ...
Juan E. Figueruelo +2 more
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Polymer-Polymer Phase Behavior
Science, 1991Different polymers can be combined into a single material in many ways, which can lead to a wide range of phase behaviors that directly influence the associated physical properties and ultimate applications. Four factors control polymer-polymer phase behavior: choice of monomers, molecular architecture, composition, and molecular size. Current theories
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2001
Introduction This chapter is concerned with the thermodynamic aspects of the fusion of binary mixtures of two homopolymers. The structural and morphological features that result from the departure from equilibrium, and their influence on properties, will be discussed in a subsequent chapter. Binary polymer blends present several different situations.
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Introduction This chapter is concerned with the thermodynamic aspects of the fusion of binary mixtures of two homopolymers. The structural and morphological features that result from the departure from equilibrium, and their influence on properties, will be discussed in a subsequent chapter. Binary polymer blends present several different situations.
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Chemical Reviews, 2001
Various aspects of supramolecular polymer were discussed. The hydrogen bonding enforced by liquid crystallinity and phase separation in the supramolecuar polymers were examined. The supramolecular polymers, based on discotic molecules, such as tryphenylenes, pthalocyanines and porphyrins were also elaborated.
L. Brunsveld +3 more
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Various aspects of supramolecular polymer were discussed. The hydrogen bonding enforced by liquid crystallinity and phase separation in the supramolecuar polymers were examined. The supramolecular polymers, based on discotic molecules, such as tryphenylenes, pthalocyanines and porphyrins were also elaborated.
L. Brunsveld +3 more
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