Aubrey D. Jenkins

Glossary of basic terms in polymer science (IUPAC Recommendations 1996)

Titular Members: G. Allegra (Italy, to 1989); R. E. Bareiss (Germany, to 1993); N. M. Bikales (USA, Secretary to 1987); K. Hatada (Japan, Associate Member from 1987, Titular Member from 1989); A. D. Jenkins (UK, Chairman to 1985, Associate Member to 1987); J. Kahovec (Czech Republic, Associate Member from 1987, Titular Member from 1991); P. Kratochvíl (Czech Republic, Chairman to 1991); E. Maréchal (France, Associate Member from 1991, Titular Member from 1993); W. V. Metanomski (USA, Associate Member from 1987, Titular Member from 1991); I. Mita (Japan, Titular Member to 1989, Associate Member to 1991); C. Noël (France, to 1993); I. M. Papisov (Russia, to 1987, Associate Member to 1991); V. P. Shibaev (Russia, from 1987); R. F. T. Stepto (UK, Associate Member from 1987, Titular Member from 1989, Chairman from 1991); U. W. Suter (Switzerland, to 1991, Associate Member to 1993); W. J. Work (USA, Associate Member from 1985, Secretary from 1987).

The formation of polyaniline and the nature of its structures

The oxidative polymerization of aniline gives rise to polyaniline which exists in a variety of forms, differing in electrical conductivity and in colour. A scheme of interrelated structures which accounts for all the spectroscopic and conductometric observations, is proposed, together with a set of equations summarizing the chemical transformations involved.

Compendium of polymer terminology and nomenclature : IUPAC recommendations 2008

Chapter 1: Glossary of Basic Terms in Polymer Science (1996) Chapter 2: Stereochemical Definitions and Notations Relating to Polymers (1980) Chapter 3: Definitions of Terms Relating to Individual Macromolecules, their Assemblies, and Dilute Polymer Solutions (1988) Chapter 4: Basic Classification and Definitions of Polymerization Reactions (1994) Chapter 5: Definitions Relating to Stereochemically Asymmetric Polymerizations (2002) Chapter 6: Definitions of Terms Relating to Crystalline Polymers (1988) Chapter 7: Definitions of Terms Relating to Low-Molar-Mass and Polymer Liquid Crystals (2001) Chapter 8: Definitions of Terms Relating to the Non-Ultimate Mechanical Properties of polymers (1997) Chapter 9: Definitions of Terms Related to Polymer Blends, Composites, and Multiphase Polymeric Materials (2004) Chapter 10: Terminology of Polymers Containing Ionizable or Ionic Groups and of Polymers Containing Ions (2006) Chapter 11: Definitions of Terms Relating to the Structure and Processing of Sols, Gels, Networks and Inorganic-Organic Hybrid Materials (2007) Chapter 12: Definitions of Terms Relating to Reactions of Polymers and to Functional Polymeric Materials (2003) Chapter 13: Definitions of Terms Relating to Degradation, Aging, and Related Chemical Transformations of Polymers (1996) Chapter 14: Introduction to Polymer Nomenclature Chapter 15: Nomenclature of Regular Single-Strand Organic Polymers (2002) Chapter 16 Nomenclature of Regular Double-Strand (Ladder and Spiro) Organic Polymers (1993) Chapter 17: Structure-Based Nomenclature for Irregular Single-Strand Organic Polymers (1994) Chapter 18: Graphic Representations (Chemical Formulae) of Macromolecules (1994) Chapter 19: Source-Based Nomenclature for Copolymers (1985) Chapter 20: Source-Based Nomenclature for Non-Linear Macromolecules and Macromolecular Assemblies (1997) Chapter 21: Generic Source-Based Nomenclature for Polymers (2001) Chapter 22: Abbreviations

Amido derivatives of metals and metalloids XII. Further reactions with protic compounds

Abstract (Dimethylamido)trimethyltin, Me3SnNMe2 reacts with pentafluorobenzene in refluxing benzene to give trimethyl(pentafluorophenyl)tin, Me3SnC6F5. This is the first example of such an amine elimination reaction involving an aromatic hydrocarbon. Amides of titanium(IV) [e.g. Ti(NMe2)4] or zirconium(IV) were found not to react with C6F5H; but the amine-elimination reaction furnished the following derivatives from appropriate organometallic dimethylamides: Ti( NCH 2 C H2)4, Cp2Zr( NCH 2 C H2)2 (Cp = π-C5H5), π-(MeC5H4)Ti(CCPh)(NMe2)2, Cp2M(CCPh)2 (M = Zr, or Hf), [π-(MeC5H4)]2Zr(CCPh)2, CpNb(NMe2)3, Me3SnCC(CH2)2Pr-i, Me3SnCCC(Me)CH2, and Me3SnCC(CH2)3CCSnMe3.

Interpretation of reactivity in radical polymerization—Radicals, monomers, and transfer agents: Beyond the Q‐e scheme

50 years ago, Alfrey and Price advanced the Q-e scheme for the interpretation of radical and monomer reactivity and the prediction of monomer reactivity ratios in radical copolymerization. Despite the early criticism of the scheme by Mayo and Walling, and its obvious fundamental shortcomings, it continues to be essentially the only such scheme in use today. However, the more soundly based Patterns of Reactivity Scheme, originally proposed in 1959, has recently been revised in such a way that it provides, in a simple way, far more accurate predictions of monomer reactivity ratios than does the Q-e scheme. Moreover, it is equally applicable to the forecasting of chain-transfer constants and to the understanding of the reactivity of initiator radicals. The history of investigations of radical, monomer, and transfer agent reactivity is reviewed here, including a summary of the Revised Patterns Scheme and its applications.

Light-scattering characterization of spherical particles prepared by the dispersion polymerization of methyl methacrylate in a non-aqueous medium

Poly(methyl methacrylate) particles stabilized by polystyrene- block -poly(ethylene- co -propylene) in decane were prepared by dispersion polymerization. Scanning electron microscopy showed that the particles are spherical, relatively uniform in size and of submicrometre dimensions. Particle molar masses M w of the order of magnitude 10 9 g mol −1 and radii of gyration can be determined with good accuracy by static light scattering if a logarithmic version of the Zimm plot is used. Geometric dimensions were calculated from the radii of gyration. Information on particle swelling can also be derived from the light-scattering data. The particle cores are found to be considerably swollen. The dimensions obtained from static light scattering are in accord with the dynamic light-scattering data.

The initiation of polymerization by organometallic compounds—II. The polymerization of acrylonitrile with titanium tetradimethylamide and related reactions☆

Abstract The polymerization of acrylonitrile initiated by titanium tetradimethylamide is described and discussed in some detail. A mechanism, which adequately accounts for the behaviour observed, is suggested; the kinetic consequences of the scheme are related to the experimental data. Some information about comparable reactivities of other transition metal compounds and other monomers is recorded.

A brief guide to polymer nomenclature (IUPAC Technical Report)

The universal adoption of an agreed nomenclature has never been more important for the description of chemical structures in publishing and online searching. The International Union of Pure and Applied Chemistry (IUPAC) and Chemical Abstracts Service (CAS) make similar recommendations. The main points are shown here with references to original documents. Further details can be found in the IUPAC Purple Book.

Revised patterns of reactivity in radical polymerization

Abstract A revised method is proposed for the inerpretation of the polymerization reactivity of radicals, monomers and transfer agents in terms of structure, specifically factors related to delocalization and polarity.

The Revised Patterns Scheme for the prediction of monomer reactivity ratios. Part 4: A table of parameters and the r11 check†

The prediction of monomer reactivity ratios is greatly improved by the use of the Revised Patterns of Reactivity Scheme. The application of this scheme is described and a table of the necessary parameters for 143 monomers is provided. A check on the parameters is presented which consists of using them to predict r 11 , necessarily equal to unity.