Polymer Engineering and Science articles from February 2007

Polymer Engineering and Science archives from February 2007

Properties and preparation of thermoplastic polyurethane/silica hybrids using a modified sol-gel process.(Author abstract)
February 1, 2007... INTRODUCTION Nanocomposites have received much attention recently due to their outstanding performance in optical, electrical, and mechanical applications. One of the most widely used routes offering the merits of low processing...

Microstructure analysis of brominated styrene-butadiene rubber.
February 1, 2007... INTRODUCTION The use of synthetic polymeric materials has increased sharply over the past few decades. A great concern regarding their flammability and reducing their flammability were noted and methods reducing their potential hazard were...

Mechanical properties and morphologies of polypropylene/single-filler or hybrid-filler calcium carbonate composites.(Author abstract)
February 1, 2007... INTRODUCTION Polypropylene (PP) as one of the most important commodity polymers is widely used in technical applications. Because of its good processability, relatively high mechanical properties, great recyclability, and low cost, PP has...

C[O.sub.2] foaming based on polystyrene/poly(methyl methacrylate) blend and nanoclay.
February 1, 2007... INTRODUCTION Typical physical foaming agents [1-4] are volatile chemicals, such as chlorofluorocarbons (CFC), volatile hydrocarbons and alcohols, or inert gases (nitrogen, carbon dioxide, argon, and water). The traditional CFC physical...

Computation of starch cationization performances by twin-screw extrusion.
February 1, 2007... INTRODUCTION Modified starches are widely used for food and non-food products, for example in the domains of paper (bedding and sizing), adhesives (stamps, book-binding, labels, plywood), textile (clothing), cosmetic (make-up),...

Reprocessing acrylonitrile-butadiene-styrene plastics: structure-property relationships.
February 1, 2007... INTRODUCTION ABS (acrylonitrile-butadiene-styrene) is one of the most frequently used polymers in electrical and electronic equipment, as well as having widespread applications in automobiles, communication instruments, and other...

Immobilized [Me.sub.2]Si([C.sub.5][Me.sub.4])(N-tBu)Ti[Cl.sub.2]/(nBuCp)[.sub.2]Zr[Cl.sub.2] hybrid metallocene catalyst system for the production of poly(ethylene-co-hexene) with pseudo-bimodal molecular weight and inverse comonomer distribution.(Author abstract)
February 1, 2007... INTRODUCTION Linear low density polyethylene (LLDPE) from metallocene catalyst offers superior mechanical properties such as excellent toughness, dart impact strength, clarity, and sealability, although it suffers from a poor...

Development of wood-substituted composites from highly filled polybenzoxazine-phenolic novolac alloys.
February 1, 2007... INTRODUCTION Though human beings have a long history of utilization of wood, global environmental concerns about rapid natural forest depletion and some major drawbacks of natural wood products such as high water uptake (30%-200%), termite...

Microdielectric analysis and curing kinetics of an epoxy resin system.
February 1, 2007... INTRODUCTION Currently, there is increasing interest in using carbon fiber/epoxy composites in the aerospace industry. The study of the cure behavior of the epoxy resin is crucial for reducing the manufacturing cost and producing high...

An experimental study of slip flow in capillaries and semihyperbolically converging dies.
February 1, 2007... INTRODUCTION In fluid flow through a capillary, the "no-slip" boundary condition at the walls is usually assumed. This condition implies complete adhesion of the fluid to solid boundaries. However, this assumption does not always hold...

Single thermoplastic pellet molding by means of diode laser for micromolding application.
February 1, 2007... INTRODUCTION Polymer micromolding is one of the most promising fabrication techniques for non-electronic microdevices, depending on the negligible material cost and productivity. Moreover, plastic materials are a very large material class,...

Processability, property, and morphology of biodegradable blends of poly(propylene carbonate) and poly(ethylene-co-vinyl alcohol).
February 1, 2007... INTRODUCTION In recent years, aliphatic polycarbonate (APC), copolymers of carbon dioxide (C[O.sub.2]) and epoxies, have attracted scientific and practical interests with respect to the fixation of C[O.sub.2] and the biodegradability...

Processing, rheology, and storage stability of recycled EVA/LDPE modified bitumen.
February 1, 2007... INTRODUCTION Petroleum bitumen has been widely employed in the paving industry for many years. It has been reported [1, 2] that some bitumen properties, such as impermeability, adhesivity, and elasticity, as well as its low cost, make it...

Fluorescence quenching of phenanthrene and anthracene by maleic anhydride and n-octadecenylsuccinic anhydride in solution and in bulk polypropylene.
February 1, 2007... INTRODUCTION Fluorescence quenching of polyaromatic molecules by electron deficient molecules was extensively studied in liquid solutions and both dynamic (collisional) and static fluorescence quenching mechanisms were developed [1-3]. The...