Preparation of a Composite Material from an Unsaturated Polyester Resin and Glass Fibers

Preparation of a Composite Material from an Unsaturated Polyester Resin and Glass Fibers 

Safety precautions Before this experiment is carried out, Sect. 2.2.5 must be read as well as the material safety data sheets (MSDS) for all chemicals and products used. 

The increase in stiffness of an unsaturated polyester resin by incorporation of glass fibers can be demonstrated by the following small-scale experiment two small dishes of equal size (10 x 10 x 3 cm) are formed from aluminum foil. Subsequently, 0.2 g of dibenzoyl peroxide are mixed into 20 g of an unsaturated polyester in styrene (see Ex- 

Example 5.20b Preparation of Electrically Conductive Composites by Filling Poiycarbonate (PC) with Carbon Black (CB) 

In practice, composites are mostly prepared by mechanical mixing. Discontinuous and continuous melt mixing reactors (kneading chambers, extruders) are used. Principally, also laboratory equipment like metal stirrers can be used to mix fillers with a polymer melt but the typical high viscosity of polymer melts hampers a homogeneous dispersion of the filler particles in the melt. 

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