Polymer Engineering and Science articles from August 2007

Polymer Engineering and Science archives from August 2007

Omastova special issue.(Preface)
August 1, 2007... This special issue of Polymer Engineering and Science (PES) includes selected papers presented at the 20th Bratislava International Conference on Macromolecules, Advanced Polymeric Materials (APM 2006), held in Bratislava, Slovakia, June 11-15,...

Optical properties of polyimines: UV-vis and photoluminescence study of undoped and doped polymers in aprotic and protic solvents.(Technical report)
August 1, 2007... INTRODUCTION Most of the polymers currently being developed for electronic, optoelectronic, and photonic applications are based on [pi]-conjugated polymers [1-9]. This progress can be rationalized by analyzing the strategies used for...

Adhesion of thermoplastic elastomer on surface treated aluminum by injection molding.(Technical report)
August 1, 2007... INTRODUCTION The good processability and properties of thermoplastics and thermoplastic elastomers have made them the most widely used class of materials in the world when measured by volume. However, the properties of metals and ceramics...

Electrorheological activity of suspensions of surface-modified pyrolyzed polyacrylonitrile.(Technical report)
August 1, 2007... INTRODUCTION During the last 20 years a lot of attention has been paid to "smart materials," that change their properties in response to various stimuli. Electrorheological (ER) fluids, whose rheological characteristics depend on electric...

Preparation, surface chemistry, and electrical conductivity of novel silicon carbide/polypyrrole composites containing an anionic surfactant.(Technical report)
August 1, 2007... INTRODUCTION Silicon carbide (SiC) is a wide band gap semiconductor with high physical and chemical stability, which makes it a very promising material for electronic devices in high temperature, high power, and high frequency applications...

Study of surface and adhesive properties of polypropylene grafted by maleic anhydride.(Technical report)
August 1, 2007... INTRODUCTION The hydrophobicity of isotactic polypropylene (iPP) limits their practical application at the preparation of the iPP mixtures with the polar polymers and/or additives that improve its adhesive properties, wettability, and the...

Microstructural characterization of polymeric materials by small angle neutron scattering.(Technical report)
August 1, 2007... INTRODUCTION Neutron investigations have recently become an increasingly significant probe across a wide range of disciplines, revealing important properties about materials, and components of industrial interest. The basic principles of...

A method for assessing the choice of polymeric materials for specific applications.
August 1, 2007... INTRODUCTION Polymeric membranes have a wide field of applications, ranging from the purification of products to the generation of energy, as a constituent of fuel cell stacks. Among the recent studies of the membranes we can very quickly...

Polymer composites with cellulose microfibrils.(Technical report)
August 1, 2007... INTRODUCTION Renewability, reduced wear on processing equipment, low specific gravity, and low cost are the main advantages of natural fibers (nonwood and wood fibers) over traditional reinforcing materials, which contributed to the rapid...

Micromechanical deformation processes in PA/layered silicate nanocomposites: correlation of structure and properties.(polyamide)(Technical report)
August 1, 2007... INTRODUCTION Polyamide nanocomposites proved to be the most successful among all polymer/layered silicate nanocomposites [1-23]. Modification of the surface of the clay with an [omega]-amino acid assists exfoliation, on the one hand, and...

Wood flour filled polypropylene composites: interfacial adhesion and micromechanical deformations.(Technical report)
August 1, 2007... INTRODUCTION Recently, the interest in composite materials reinforced with wood flour and natural fibers increased considerably [1-5]. Such materials offer various benefits with only a few drawbacks, the majority of which can be overcome....

Capability of cationic water-soluble polymers in conjunction with ultrafiltration membranes to remove arsenate ions.(Technical report)
August 1, 2007... INTRODUCTION Arsenic contamination of drinking water is considered a principal environmental health threat throughout the world. Chronic intake is associated with an increased risk to cancer, diabetes, and cardiovascular disease, and...

Exfoliation behavior of montmorillonite modified by poly(oxyalkylene)s in polypropylene and the properties of the resulting nanocomposites.(Technical report)
August 1, 2007... INTRODUCTION Nanocomposites (NC's) consisting of layered silicates (clays) distributed in a polymer matrix have been invented now almost 20 years ago by a research group of Toyota [1]. Since then, a variety of research projects have been...

Synthesis and polymerization reactions of cyclic imino ethers. II. preparation of novel hyperbranched polymers from [AB.sub.2] monomers of 2-oxazoline type with nonequivalent B units.
August 1, 2007... INTRODUCTION One of the strongly developing fields of macromolecular chemistry is chemistry of dendritic polymers (i.e., dendrimers and hyperbranched polymers), where special and unknown rheological properties of polymers were obtained...