SPE Library

The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.

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Applied Rheology

SPE Library content related to rheology

The influence of atmospheric pollutants on plasticized poly(vinyl chloride)

Naima Belhaneche-Bensemra, December 2010

Exposure of plasticized polymers to natural ageing exhibits hardness and tensile-strength degradation, particularly in the presence of both nitrogen dioxide and ozone.

Effects of pressure and gases on viscosity of molten plastics

John Dealy , Hee Eon Park, December 2010

A high-pressure sliding-plate rheometer provides an attractive alternative to conventional instruments for measuring the impact of pressure and dissolved gases on polymer behavior.

Rheological structure of silver nitrate micro-emulsions

Edna C. de la Cruz, Jose C. Ortiz, Hened Saade, Raul G. Lopez, December 2010

Bicontinuous aqueous micro-emulsions exhibiting Newtonian behavior and low viscosity are suitable for silver-nanoparticle synthesis.

Nanocomposite dispersions based on cellulose whiskers and acrylic co-polymer

Ayman Ben Mabrouk, Sami Boufi, December 2010

Addition of methacryloxypropyl triethoxysilane stabilizes the dispersion and favors anchoring of the whiskers onto polymer particles.

Using a torque rheometer to characterize flow in poly(vinyl chloride) composites

Gulsen Albayrak Ari, November 2010

An instrument that is basically a batch mixer provides valuable data regarding the processability of polymer micro- and nanomaterials, and is also a useful tool in quality control and product development.

Mechanical characterization of hydrogel

Allan D. Rogalsky, H. J. Kwon, October 2010

Digital image correlation is a viable approach to noncontact deformation sensing.

Reactive compatibilization of polymer blends

Sabu Thomas, Indose Aravind, October 2010

The rheology and morphology of uncompatibilized and reactively compatibilized blends of polytrimethylene terephthalate and ethylene propylene diene monomer correlate strongly.

Compatibilizers improve exfoliation in polymer-clay nanocomposites

Saul Sanchez-Valdes , Luis Francisco Ramos-deValle, August 2010

Melt viscosity, measured by capillary rheometry, indicates the degree that exfoliation is improved by adding maleated polyethylene compatibilizers to polyethylene-nanoclay composites.

Predicting flow and temperature effects on polymer crystallization

Patrice Chantrenne, M'hamed Boutaous, Rabie El Otmani, Matthieu Zinet, July 2010

Simulating crystalline microstructure development under various thermal and mechanical conditions provides an essential step towards determining the final properties of injected parts.

Stronger high-density polyethylene

Xiaolei Chen , Lumin Wang, July 2010

Differential-scanning-calorimetry measurements show that nanocomposites containing barium sulfate have a more perfect crystalline phase.

More efficient manufacture of controlled-rheology polypropylene

Santanu Dutta , Amit Rai, July 2010

Polymer formation of a certain molecular weight can be predicted with careful control of reaction conditions.

Nanotalc improves properties of polyamide-6 binary and ternary nanocomposites

Prasath Balamurugan , S. N. Maiti, July 2010

Nanotalc is more easily exfoliated than nanoclay through melt blending and forms extended, networklike structures and improved tensile strength, modulus, and flow in polyamide-6.

Phase coalescence impacts rheology and birefringence of polymer blends

Jinhai Yang , Qibo Jiang, James L. White, July 2010

A new phase-morphology development explains significant viscosity and birefringence drops following melt processing.

Effect of fountain flows on injection-molding-induced morphology

Yasuhiko Otsuki, Yutaka Kobayashi, Toshitaka Kanai, June 2010

In injection molding of polypropylene, extensional deformation at the advancing flow front causes high birefringence near the surface.

Thermoforming poly(methyl methacrylate) transparencies

Luc Chevalier, Pierre Gilormini, Gilles Regnier, June 2010

Numerical simulations enable prediction of the properties of polymer transparencies that are thermoformed near their relevant glass-transition temperature.

Viscoelasticity, tackiness, and extrusion flow of block copolymers

Maria Eugenia Munoz, Mercedes Fernandez, Alfonso Arevalillo, Pedro A. Santamaria, May 2010

The dominant rubbery state in high-molecular-weight thermoplastic elastomers leads to a lack of adhesion and a plug flow.

Interaction of normal and shear stresses in an epoxy polymer

Zihui Xia, May 2010

Superimposed cyclic tension or shear stress increases time-dependent deformation, while constant stress accelerates accumulation of ratcheting strain in cyclic tension or shear loading.

Blending sequence effects on rheological properties of ternary composites

Ping Gao, Youhong Tang, May 2010

The differing compatibilities of organoclay, thermotropic liquid crystalline polymer, and polyethylene produce a range of structural and flow behaviors in their blended forms.

PROCESSING AND PERFORMANCE OF HDPE POLYMER BLENDS INCLUDING POST CONSUMER RECYCLED HDPE

T. Beiss, C. Dallner, E. Schmachtenberg, May 2010

With the rapid increase in the market for recycled polyethylene from various sources, there is an urgent need to quantify the performance of these materials. Blends of recycled high density polyethylene (HDPE) were prepared to obtain specific mechanical properties and MFI. The results show that the MFIs had significant effect on the rheological, mechanical and phase morphology characteristics of the various blends.

APPLIED RHEOLOGY FOR HDPE DIE DROOL PHENOMENON

Siqiang Zhu, Rahul Rasal, Douglas Hirt, May 2010

In this work, two different HDPEs were investigated from rheological as well as die drool phenomenon point of view. It has been revealed that long-chain branching and low polymer melt elasticity significantly reduce die drool phenomena at the die exit region.