Polymer materials with controlled degradation time

ENVIRONENTAL DEGRADATION OF ADVANCED AND TRADITIONAL ENGINERING MATERIALS Chapter 14. Forms of Polymer Degradation: Overview

Controlled drug release from porous materials by plasma polymer deposition.

In this communication, we present a novel approach for control of drug release from porous materials. The method is based on deposition of a plasma polymer layer with controlled thickness which reduces a pore diameter and, hence, defines the rate of drug release.

Chemical Recycling of Polymer Materials

After the first life cycle of plastics various recycling processes are available for further utilization of these valuable materials. For an ecologically and economically satisfying solution the most suitable process has to be chosen. In chemical recycling polymers are degraded to basic chemical substances which can be reused in the petrochemical industry. For soiled waste plastics or waste pla...

Thermal Degradation of Cellulosic Materials

Fortisan, cellulose triacetate, and NOroxidized cellulose were pyrolyzed in a vacuum in the temperature range 1800 to 465 0 C. Cotton cellulose and cellulose t ri acetate were also pyrolyzed in nitrogen at atmospheric pressure. The tar yields were in the decreasing order from: Cotton, Fortisan, cellulose triacetate, and oxidized cellulose. The other volatiles consisted mainly of acetic acid, ca...

Perpendicular Actuation with Individually Controlled Polymer Microactuators

We are using microactuators based on a conducting polymer, polypyrrole, and demonstrate here a scheme to make true three-dimensional movements. We present a complementary microfabrication method, which was developed in order to create individually addressable and controllable PPy/Au actuators. Using these individually controlled microactuators we are able to obtain movements both out of and in ...