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About 10,000 papers for “Polymer”

Polymer-Polymer Complex

A. D. Jenkins, P. Kratochvĺl, R. F. T. Stepto et al. · IUPAC Standards Online · 2016

The clear and unambiguous definition of basic terms in a field of science has special significance. Subsequent nomenclature must refer back to these basic terms, and the utmost care is, therefore, required in preparing and revising them. In 1974, the Commission published a document entitled “Basic Definitions of Terms Relating to Polymers (1974)”, that appeared in [IUPAC Standards Online]Pure Appl. Chem.1974,40, 479–491. These definitions have been the foundation for the Commission’s work and, building on this basis, the Commission has developed a number of further nomenclature documents. The vast majority of terms in the basic document serve their purpose well. Progress in polymer science and the need for new definitions, the proper wording of which would have been incompatible with some of the basic terms, made it increasingly apparent that some change was needed in the basic terms. Approximately twenty years since the publication of the first document, the Commission now issues a revised and enlarged set of basic terms. The new glossary of terms has been formulated by the Commission with the additional input and aid of several well-known researchers and journal editors.

Cited by 0

polymer–polymer complex

2008

Citation: 'polymer–polymer complex' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.P04743 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial usage of the compendium should be directed to IUPAC.

Cited by 0

Polymer-Polymer Interdiffusion

F. Brochard, P. G. de Gennes · Europhysics Letters (EPL) · 1986

We 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. Marker particles cannot move with respect to the gel, and follow its boundary displacement x(t). We find x(t) ∼ (DSt)1/2 in agreement with a number of recent data. But the overall density of the mixture remains constant everywhere, and the process has nothing to do with an uneven distribution of vacancies.

Cited by 81

Polymer–Polymer Complex

W. J. Work, K. Horie, M. Hess et al. · IUPAC Standards Online · 2016

The document defines the terms most commonly encountered in the field of polymer blends and composites. The scope has been limited to mixtures in which the components differ in chemical composition or molar mass and in which the continuous phase is polymeric. Incidental thermodynamic descriptions are mainly limited to binary mixtures although, in principle, they could be generalized to multicomponent mixtures.

Cited by 0

Polymer/Solvent and Polymer/Polymer Interaction Studies

James C. Holste, Charles J. Glover, D. T. Magnuson et al. · 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 tests is found. Furthermore, curing of the PATS at 240 deg C for 24 hours did not change the measured plasticizer/solvent interactions. Piezoelectric sorption techniques were used to study the solution properties of a P1700/ATS/dichloromethane system. Phase equilibrium data are presented for ATS/dichloromethane, P1700/dichloromethane and P1700/ATS/ dichloromethane. The ternary system contained 70% P1700 and 30% ATS by weight on a dry basis. Both the Flory-Huggins and corresponding states solutions were used in the data analysis. In both cases, the binary interaction parameter for P1700- ATS interactions indicated strong interactions, in agreement with experimental observations that these polymers form a compatible system. Gas chromatographic investigations of the Radel polysulfone indicate the presence of a phase transition of undetermined character between 185 and 200 deg C in addition to the glass transition between 220 and 230 deg C.

Cited by 0

Uniform Polymer, Monodisperse Polymer

A. D. Jenkins, P. Kratochvĺl, R. F. T. Stepto et al. · IUPAC Standards Online · 2016

The clear and unambiguous definition of basic terms in a field of science has special significance. Subsequent nomenclature must refer back to these basic terms, and the utmost care is, therefore, required in preparing and revising them. In 1974, the Commission published a document entitled “Basic Definitions of Terms Relating to Polymers (1974)”, that appeared in [IUPAC Standards Online]Pure Appl. Chem.1974,40, 479–491. These definitions have been the foundation for the Commission’s work and, building on this basis, the Commission has developed a number of further nomenclature documents. The vast majority of terms in the basic document serve their purpose well. Progress in polymer science and the need for new definitions, the proper wording of which would have been incompatible with some of the basic terms, made it increasingly apparent that some change was needed in the basic terms. Approximately twenty years since the publication of the first document, the Commission now issues a revised and enlarged set of basic terms. The new glossary of terms has been formulated by the Commission with the additional input and aid of several well-known researchers and journal editors.

Cited by 0

Polymer Synthesis: Polymer Catalysis

Bruno Améduri · Medical Entomology and Zoology · 1997

Contents: E. Ruckenstein: Concentrated Emulsion Polymerization.- Y. Yagci, T. Endo: N-Benzyl and N-Alkoxy Pyridinium Salts as Thermal and Photochemical Initiators for Cationic Polymerization.- B. Am duri: Symthesis of Block Copolymers by Radical Way.- W. Kaminsky, M. Arndt: Metallocenes for Polymer Catalysis.

Cited by 5

Polymer-polymer HDPE blends

M. D. Ragushina, В. В. Битт, T. L. Gorbunova et al. · Plasticheskie massy · 2023

The article presents the results of a study of the addition of high-viscosity unimodal HDPE on the complex of physicochemical, rheological and strength properties of PE100. The analysis of thermal properties according to TGA/DTA data as well as the results of studying the composition of volatile products, and the molecular weight characteristics of individual components and blends are presented. The conducted studies have shown that the introduction of high-viscosity unimodal HDPE into bimodal PE100 makes it possible to control the rheological characteristics of the material, shifting the “melt breakdown” to the area of high shear rates, i.e. to increase the processability of the original PE 100, and expand the processing range, which may be useful in the production of extruded sheets and profile products. At the same time, the strength characteristics of the finished product will remain at the level of PE100.

Cited by 0Open access

Polymer-Polymer Bilayer Actuator

Harrison, Joycelyn S., Su, Ji, St.Clair, Terry L. · NASA Technical Reports Server (NASA)

A device for providing an electromechanical response includes two polymeric webs bonded to each other along their lengths. At least one polymeric web is activated upon application thereto of an electric field and exhibits electrostriction by rotation of polar graft moieties within the polymeric web. In one embodiment, one of the two polymeric webs in an active web upon application thereto of the electric field, and the other polymeric web is a non-active web upon application thereto of the electric field. In another embodiment, both of the two polymeric webs are capable of being active webs upon application thereto of the electric field. However, these two polymeric webs are alternately activated and non-activated by the electric field.

Cited by 0Open access

Network Polymer, Polymer Network

A. D. Jenkins, P. Kratochvĺl, R. F. T. Stepto et al. · IUPAC Standards Online · 2016

The clear and unambiguous definition of basic terms in a field of science has special significance. Subsequent nomenclature must refer back to these basic terms, and the utmost care is, therefore, required in preparing and revising them. In 1974, the Commission published a document entitled “Basic Definitions of Terms Relating to Polymers (1974)”, that appeared in [IUPAC Standards Online]Pure Appl. Chem.1974,40, 479–491. These definitions have been the foundation for the Commission’s work and, building on this basis, the Commission has developed a number of further nomenclature documents. The vast majority of terms in the basic document serve their purpose well. Progress in polymer science and the need for new definitions, the proper wording of which would have been incompatible with some of the basic terms, made it increasingly apparent that some change was needed in the basic terms. Approximately twenty years since the publication of the first document, the Commission now issues a revised and enlarged set of basic terms. The new glossary of terms has been formulated by the Commission with the additional input and aid of several well-known researchers and journal editors.

Cited by 0

Polymer Bulletin Polymer Bulletin

Moacir Fernandes Ferreira Júnior, Elaine Angélica Ribeiro Mundim, Guimes Rodrigues Filho et al. · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · 2011

texto completo: acesso restrito. p.377–389.

Cited by 0Open access