• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 199
  • 72
  • 56
  • 21
  • 17
  • 11
  • 8
  • 6
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • Tagged with
  • 459
  • 110
  • 77
  • 77
  • 59
  • 56
  • 51
  • 50
  • 45
  • 43
  • 43
  • 40
  • 39
  • 35
  • 34
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

The potential of Brazilian oil shale as a filler for thermoplastics

Nascimento, R. S. V. January 1987 (has links)
No description available.
32

Designing with long fibre reinforced polyamides : practice and theory

O'Reagan, Desmond F. January 1994 (has links)
No description available.
33

Mechanical properties of glass fibre reinforced polypropylene thermoplastic pipes

Kareem, Yusuf Abiola 12 March 2008 (has links)
ABSTRACT Glass fiber reinforced polypropylene pipes were fabricated from 6-10 layers of “Plytron” GN638T 25mm wide glass fiber pre-impregnated polypropylene tapes using filament winding/tape laying process, in-situ consolidation on a 1000mm long mandrel. Infrared heater and heat gun were used in heating the incoming tapes and the substrate at the nip point. The effects of process pressure and temperature on the mechanical properties were investigated by testing samples of test laminates and fabricated pipes for their mechanical properties. Results indicated that the mechanical properties of the test samples and pipes were affected by changes in process temperature and pressure, with an optimum process pressure and temperature being 16.8KPa and 2800C respectively. The cost analysis of the fabricated pipes indicated that the materials and method of production employed in this research could be utilized to an economic advantage when compared with the prices of the same type of pipes in SA market.
34

Delamination properties of a vinyl-ester/glass fibre composite toughened by particle-modified interlayers

Stevanović, Dejan. January 2001 (has links)
No description available.
35

Reducing the Water Absorption of Thermoplastic Starch Processed by Extrusion

Oakley, Philip 13 January 2011 (has links)
Novel plastics that are biodegradable and made from renewable natural resources are currently being researched as alternatives to traditional petroleum-based plastics. One such plastic, thermoplastic starch (TPS) is produced from starch processed at high temperatures in the presence of plasticizers, such as water and glycerol. However, because of its hydrophilic nature, TPS exhibits poor mechanical properties when exposed to environmental conditions, such as rain or humidity. The overall objective of this thesis was to produce a thermoplastic starch based material with low water absorption that may be used to replace petroleum-based plastics. Three different methods for reducing water absorption were investigated, including the following: extrusion of starch with hydrophobic polymers, starch modifying chemicals, and citric acid/sorbitol as plasticizers. It was found that all methods reduced the water absorption of TPS.
36

Reducing the Water Absorption of Thermoplastic Starch Processed by Extrusion

Oakley, Philip 13 January 2011 (has links)
Novel plastics that are biodegradable and made from renewable natural resources are currently being researched as alternatives to traditional petroleum-based plastics. One such plastic, thermoplastic starch (TPS) is produced from starch processed at high temperatures in the presence of plasticizers, such as water and glycerol. However, because of its hydrophilic nature, TPS exhibits poor mechanical properties when exposed to environmental conditions, such as rain or humidity. The overall objective of this thesis was to produce a thermoplastic starch based material with low water absorption that may be used to replace petroleum-based plastics. Three different methods for reducing water absorption were investigated, including the following: extrusion of starch with hydrophobic polymers, starch modifying chemicals, and citric acid/sorbitol as plasticizers. It was found that all methods reduced the water absorption of TPS.
37

Fiber movement during bladder molding of filament-wound preforms

Beeson, Margaret Susan 12 1900 (has links)
No description available.
38

Optimization of thermoplastic pultrusion process using commingled fibers

Kamble, Vishal D. January 2008 (has links) (PDF)
Thesis (M.S.)--University of Alabama at Birmingham, 2008. / Additional advisors: Burton Patterson, Derrick Dean, Selvum (Brian) Pillay. Description based on contents viewed Feb. 10, 2009; title from PDF t.p. Includes bibliographical references (p. 80-83).
39

An investigation of the effects of shearfree deformation and the role of miscibility on the structure and properties of in situ thermoplastic composites /

De Souza, Jose Paulino, January 1994 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references. Also available via the Internet.
40

Wood-thermoplastic composites manufactured using beetle-killed spruce from Alaska's Kenai Peninsula

Peterson, Nels Royal, January 2008 (has links) (PDF)
Thesis (M.S. in civil engineering)--Washington State University, August 2008. / Includes bibliographical references.

Page generated in 0.0228 seconds