The mechanical properties of polymeric materials, especially those of thermoplastics, depend to a much greater extent on temperature, time, and on the magnitude and nature of an applied load than those of metals. In addition, many environmental effects, such as UV radiation or exposure to certain chemicals, play a significant role in aging and related changes in properties. This can be difficul...

Micromachined polymer surfaces often lack smooth optical finish. Here we present a simple device for polishing these surfaces by stream of vapor of aggressive solvent. Depending on exposition, the initial roughness may be partially or completely removed, at the expense of slight smoothing of sharp angles within the modified area. Unlike the industrial techniques of vapor treatment of large area...

TGA measures the amount and rate (velocity) of change in the mass of a sample as a function of temperature or time in a controlled atmosphere. The measurements are used primarily to determine the thermal and/or oxidative stabilities of materials as well as their compositional properties. The technique can analyze materials that exhibit either mass loss or gain due to decomposition, oxidation or...

TGA measures the amount and rate (velocity) of change in the mass of a sample as a function of temperature or time in a controlled atmosphere. The measurements are used primarily to determine the thermal and/or oxidative stabilities of materials as well as their compositional properties. The technique can analyze materials that exhibit either mass loss or gain due to decomposition, oxidation or...

In recent years, extensive studies have been carried out on natural fiber reinforced thermoplastics due to their low cost, high specific properties, simple fabrication methods, biodegradable nature and diverse applications touching all commercial sectors. The challenge is to make composites with properties that are not overly compromised by the use of low technology. In this work, we review the...

The main purpose of bumper is to absorb shock in case of a collision. Several materials have been used to develop these shock-absorbing capabilities, such as steel, aluminium, glass mat thermoplastics and sheet molding compound. The purpose of this project is to design a bumper which is to improve crashworthiness of the bumper beam. Crashworthiness is the ability of the bumper beam to prevent o...

The purpose of this paper is to demonstrate the easy manufacturing and quick characterization several microtextured functional surfaces on two transparent thermoplastics general interest for industrial sectors. Microtextured polymeric with special optical, tribological easy-cleaning properties were manufactured via isothermal injection-molding using laser-microtextured steel mold inserts. For t...

In recent years, additive manufacturing (AM), known as “3D printing”, has experienced exceptional growth thanks to the development of mechatronics and materials science. Fused filament deposition (FDM) is most widely used technique in field AM, due low operating material costs. However, commonly for this technology are virgin thermoplastics. It worth noting a considerable amount waste exists fa...