Molding of Oriented Short Fiber Composites. III. Rate Effects on Fiber Alignment in Convergent Channels

Molding of Oriented Short Fiber Composites. III. Rate Effects on Fiber Alignment in Convergent Channels
Author: L. A. Goettler
Publisher:
Total Pages: 68
Release: 1974
Genre:
ISBN:

In an extension of the experiments performed on the compacted flow of a glass fiber- filled epoxy resin through a conical converging channel under a high pressure, this study examines the orientability of the fibers as the suspension flows into an expty mold cavity. The tensile properties of molded rods of 1/46 to 1/26 diameter reflect the level of orientation produced. Both the fiber orientability and the resulting orien- tation distribution depend strongly on the rate of elongation. The molded-in orientation distribution is also determined by the extent of convergence. Convergence angle, viscosity, and fiber length are secondary variables. The results indicate that fibers can be oriented to within 20^ of the flow axis by this technique in order to maximize mechanical performance. The anomalous dependence on the rate of elongation is thought to result from the high voidate in the material during flow. (Author-PL).

Handbook of Ceramics and Composites

Handbook of Ceramics and Composites
Author: Walter Federer
Publisher: CRC Press
Total Pages: 668
Release: 1990-04-09
Genre: Technology & Engineering
ISBN: 9780824780050

This volume is concerned with the structural and physical properties of important classes of composite and ceramic materials of engineering importance, covering synthesis of the materials by casting and solidification routes.

Modification of Polymer Properties

Modification of Polymer Properties
Author: Carlos Federico Jasso-Gastinel
Publisher: William Andrew
Total Pages: 233
Release: 2016-09-14
Genre: Technology & Engineering
ISBN: 0323443982

Modification of Polymer Properties provides, for the first time, in one title, the latest information on gradient IPNs and gradient copolymers. The book covers the broad range of polymer modification routes in a fresh, current view representing a timely addition to the technical literature of this important area. Historically, blends, copolymers, or filled polymers have been developed to meet specific properties, or to optimize the cost/properties relationship. Using the gradient structure approach with conventional radical polymerization, it has been shown that it is possible to optimize properties if appropriate gradients in the composition of copolymer chains are obtained. An overview of the gradient structure approach for designing polymers has not appeared in the recent literature and this title covers the different methods used to modify properties, offering the whole range of ways to modify polymers in just one volume and making this an attractive option for a wide audience of practitioners. The approach for each chapter is to explain the fundamental principles of preparation, cover properties modification, describe future research and applications as examples of materials that may be prepared for specific applications, or that are already in use, in present day applications. The book is for readers that have a basic background in polymer science, as well as those interested in the different ways to combine or modify polymer properties. - Provides an integrated view on how to modify polymer properties - Presents the entire panorama of polymer properties modification in one reference, covering the essential information in each topic - Includes the optimization of properties using gradients in polymers composition or structure

Comprehensive Composite Materials: Polymer matrix composites

Comprehensive Composite Materials: Polymer matrix composites
Author:
Publisher:
Total Pages: 1170
Release: 2000
Genre: Composite materials
ISBN:

A multi-reference source spanning the whole composites science field, this text covers such topics as: fibre reinforcements and general theory of composites; polymer matrix composites; metal matrix composites; test methods, nondestructive evaluation and smart composites; and design and application.