Polymer Engineering and Science articles from March 2007

Polymer Engineering and Science archives from March 2007

Toughening of polypropylene combined with nanosized CaC[O.sub.3] and styrene-butadiene-styrene.
March 1, 2007... INTRODUCTION Polypropylene is the most widely used plastics for general purpose, the toughening study of which has always been very important in polymer blending area. A lot of research papers are published each year concerning the...

Microstructure-properties correlations in dynamically vulcanized nanocomposite thermoplastic elastomers based on PP/EPDM.
March 1, 2007... INTRODUCTION Thermoplastic elastomers (TPEs) constitute a unique class of polymers that offers many of the positive attributes of vulcanized rubbers, such as low compression set and high flexibility, while being processed using...

Enthalpy relaxation in bisphenol-A polycarbonate/poly(methyl methacrylate) blends.
March 1, 2007... INTRODUCTION Among a number of studies on poly(methyl methacrylate) (PMMA) blends the mixture PMMA and of bisphenol-A polycarbonate (PC) is one of the most deeply studied polymers pair. This may be attributed to some excellent properties...

Synthesis, thermal properties, and flame retardance of the epoxy-silsesquioxane hybrid resins.
March 1, 2007... INTRODUCTION Polyhedral oligomeric silsesquioxanes (POSS) are an interesting class of three-dimensional organosilicon compounds with the general formula [RSiO3/2]n [1-3]. POSS has recently attracted enormous interest and found widespread...

Preparation and characterization of polyether-block-amide copolymer/clay nanocomposites.
March 1, 2007... INTRODUCTION The unique physical properties of nanocomposites of polymers and clays have attracted attentions from both industries and academics for more than three decades. With the addition of a small amount, usually less than 10 vol%,...

Reactive modification of PBT with applications in low density extrusion foaming.(polybutylene terephthalate )
March 1, 2007... INTRODUCTION Most of the available aromatic polyester resins, including PBT and PET, have rheological properties at processing temperatures that that are not compatible with processes such as foaming or extrusion blow molding. Extrusion...

Optimal start-up control of injection molding barrel temperature.
March 1, 2007... INTRODUCTION Injection molding, a key polymer processing process, has diverse product applications in transportation, household and instrumentation, etc. As the demand of product quality specification becomes more stringent, the control of...

Linear polymers with sulfur in the main chain. IV. synthesis of thermotropic liquid-crystalline polythioesters based on 4,4'-biphenyldithiol with excellent adhesive properties.
March 1, 2007... INTRODUCTION The use of sulfur for organic compounds has mainly been applied to the vulcanization of rubber. In recent years, sulfur came to be used as an important component of medicines and polymers. As an example concerning plastics,...

Effect of molecular structure on extrudate swell behavior for different thermoplastic melts in an electro-magnetized die.
March 1, 2007... INTRODUCTION In polymer extrusion, extrudate swell is widely known as one of the main factors to determine the quality and dimensions of the polymer product and can be explained either by the recoverable elastic deformation developed...

Flexural properties of surface reinforced wood/plastic deck board.(Author abstract)
March 1, 2007... INTRODUCTION Deck boards made of wood-plastic composites (WPCs) have increased durability with minimal maintenance compared to traditional timber-made boards. The addition of wood increases thermal stability of WPCs, while the...

Preform shape and operating condition optimization for the stretch blow molding process.
March 1, 2007... INTRODUCTION Stretch blow molding (SBM) is the process of choice for the production of PET containers, in particular for the food and beverage industry as well as the pharmaceutical sector. The SBM process is a high volume process with...

Effect of traces of inorganic content on thermal stability of poly(methyl methacrylate) nanocomposites.
March 1, 2007... INTRODUCTION Polymer/inorganic composites have been widely studied and have become one of the important sources for advanced materials [1, 2]. They often combine some of the advantages of the organic polymers (flexibility, dielectric,...

Polybutadiene rubber/organoclay nanocomposites: effect of organoclay with various modifier concentrations on the vulcanization behavior and mechanical properties.
March 1, 2007... INTRODUCTION In recent years, polymer/organophilic layered silicate (organoclay) nanocomposites have attracted considerable attention from both a fundamental research and an applications point of view because of their remarkable...

Mechanical properties of methacylic acid/acrylonitrile copolymer foam.
March 1, 2007... INTRODUCTION Sandwich structural composites are usually made of the skin, core materials, and the cementing layer. As the high strength and modulus of the skin are combined with the low density of the core materials through the cementing...

Poly(butylene terephthalate)/poly([epsilon]-caprolactone) blends: miscibility and thermal and mechanical properties.(Author abstract)
March 1, 2007... INTRODUCTION The blending of two or more polymers is a well-established strategy for achieving a specified portfolio of physical properties. From the standpoint of commercial applications and developments, polymer blending represents one...

Flame retarding effects of nanoclay on wood-fiber composites.
March 1, 2007... INTRODUCTION AND BACKGROUND Because of the numerous benefits of wood-fiber/plastic composites (WPC) such as lower cost, lower density, biodegradability from the woodfiber (WF), the moisture resistance, and dimensional stability from the...