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Mechanical Properties of Polymers and Composites

TL;DR: In this article, the authors discuss various mechanical properties of fiber-filled composites, such as elastic moduli, creep and stress relaxation, and other mechanical properties such as stress-strain behavior and strength.
Abstract: Mechanical Tests and Polymer Transitions * Elastic Moduli * Creep and Stress Relaxation * Dynamical Mechanical Properties * Stress-Strain Behaviour and Strength * Other mechanical Properties * Particulate-Filled Polymers * Fiber- Filled Composites and Other Composites.
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Journal ArticleDOI
TL;DR: The low creep and residual strain values of ALERT and SureFil compared to Dispersalloy amalgam suggest that these packable composite resins are suitable for restoring stress-bearing areas because of their ability to withstand viscoelastic deformation better than amalgam, over extended time periods, even under high load and temperature.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of coupling agent content, wood fiber content and wood fiber type on the mechanical properties of wood fiber-reinforced polymer composites (WPC) were investigated.
Abstract: This study investigated the effects of coupling agent content, wood fiber content and wood fiber type on the mechanical properties of wood fiber-reinforced polymer composites (WPC). This study adopted a response surface strategy of a 20 run optimal design for these three factors. The WPC modulus of elasticity was mainly influenced by wood fiber type and wood fiber content, and tensile stress at break depended on wood fiber type, wood fiber content and coupling agent content, whereas strain at break was significantly affected by wood fiber content and coupling agent content, but not significantly influenced by wood fiber type.

34 citations


Cites background from "Mechanical Properties of Polymers a..."

  • ...The properties of WPCs greatly depend on the combined behaviors of wood fiber (WF), polymer matrix, and their interface (Dubois et al. 1998, Jones 1975, Nielsen and Landel 1994, Zhang et al. 2004a, Zhang et al. 2004b)....

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  • ...This trend generally holds true in non-compatible polymer composites (Jones 1975, Lee and Ohkita 2003, Nielsen and Landel 1994, Sain et al. 1993, Xu et al. 2001, Zhang et al. 2004b)....

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Journal ArticleDOI
TL;DR: Marked changes of thermodynamic and tensile parameters, as elastic modulus, strength and elongation at break were observed for the composites, depending on blend composition, polymer miscibility and fibre-matrix chemical interactions at the interface.

34 citations

Journal ArticleDOI
TL;DR: A general overview of the different biological obstacles that a nanocarriers must negotiate before it can carry out its desired role as a medicinal agent is offered.
Abstract: Many pharmaceuticals on the market suffer from two significant limitations to their activity: lack of specificity toward the pathological site and poor aqueous solubility. Both factors therefore require the application of a large total dose of a drug to achieve high local concentration, causing numerous off-target toxic effects. Consequently, the grand aim of targeted drug delivery - the often-referred “magic bullet” - promises to improve drug concentration at the target site and maximize therapeutic response. Nanomaterial drug delivery systems have been explored extensively in the recent years for just this purpose. In the field of medicine, nanocarriers (NCs) have the potential to improve the biodistribution and pharmacokinetic characteristics of drugs, thereby reducing side effects while improving the therapeutic effect of drugs. Many nanomaterials are exquisitely designed and possess potent properties, yet it is extremely important to note that a general understanding of the interaction of nanomaterials with biological systems is essential for any such model properties to be effective in vivo, since the body presents a host of biological ‘barriers’ that will be encountered drug NCs. This review offers a general overview of the different biological obstacles that a NC must negotiate before it can carry out its desired role as a medicinal agent. From this standpoint we suggest aspects that should be considered for the rational design of novel nanomaterials possessing physicochemical properties that are appropriate for therapeutic or theragnostic applications.

34 citations

Journal ArticleDOI
TL;DR: In this article, maleated styrene-ethylene-butylene-styrene block copolymer and maleated polypropylene (PP-g-MA) compatibilizers were incorporated to improve the dispersion of 5-wt% commercial organoclay.

34 citations