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This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on January 1, 1998. The length of the article is 3973 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

From the author: Owing to the lack of reliable and cost-effective joining methods, composite materials have not yet achieved their full market potential. The use of heat-activated thermal couplings offers a quick and cost-effective method for joining composite-to-composite pipe. In this study, a prepreg laminate containing thermoset resins and fiberglass reinforcements is wrapped around the ends of the components to be joined. A shrink tape, constructed of an oriented polyester film, is placed over the prepreg laminate. When heat is applied to the thermal coupling for curing, the shrink tape shrinks and compresses the prepreg to improve adhesion. Tests of the heat-activated thermal coupling in bending shows an increase of 29% over the currently used butt-weld method. A finite element model has been developed to assist in determining the most appropriate cure cycle required for different joint configurations. This reduces the need for experimentation when a variable has been changed. based on the tested prepreg material properties and model, the FEA temperature distribution differs less than 10% from that of experimental results.

Citation Details
Title: Development of heat-activated joining technology for composite-to-composite pipe using prepreg fabric.
Author: Michael A. Stubblefield
Publication:Polymer Engineering and Science (Refereed)
Date: January 1, 1998
Publisher: Society of Plastics Engineers, Inc.
Volume: 38 Issue: 1 Page: 143(7)

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This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Advanced sludge treatment processes (AST) reduce the amount of sludge produced and improve the dewaterability, thus probably also affecting the heat transfer properties and the drying characteristics of the sludge. This paper studies the influence of the Fenton peroxidation on the thermal conductivity of the sludge. Results demonstrate that the Fenton's peroxidation positively influences the sludge cake consistency and hence enhances the mechanical dewaterability and the drying characteristics of the dewatered sludge. For the two sludges used in this study, i.e. obtained from the wastewater treatment plants (WWTP) of Tienen and Sint-Niklaas - the dry solids content of the mechanically dewatered sludge increased from 22.5% to 40.3% and from 18.7% to 35.2%, respectively. The effective thermal conductivity k"e of the untreated and the peroxidized sludges is measured and used to determine the heat transfer coefficient h"s. An average improvement for k"e of 16.7% (Tienen) and 5.8% (Sint-Niklaas) was observed. Consequently the value of h"s increased with 15.6% (Tienen) and 5.0% (Sint-Niklaas). This increased heat transfer coefficient in combination with the increased dewaterability has direct implications on the design of sludge dryers. A plate-to-plate calculation of a multiple hearth dryer illustrates that the number of plates required to dry the peroxidized sludge to 90% DS is less than half the number of plates needed to dry untreated sludge. This results in reduced dryer dimensions or a higher capacity for an existing dryer of given dimensions. .
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This digital document is a journal article from Bioresource Technology, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
To prepare carbon molecular sieves (CMSs), methane was pyrolyzed in an attempt to deposit fine carbon particles on the micropore mouths of the carbon substrates being heated; the carbon substrates included grain-based activated carbons and commercial activated carbons. To explore the effects of heat treatment alone, blank experiments were conducted by heating the samples in N"2. The resultant products were characterized by N"2-adsorption at 77K. Methane failed to deposit carbon at 800^oC. The porosity of activated carbons, however, was substantially influenced by heat treatment alone. The surface areas and micropore volumes of the activated carbons from grain sorghum decreased by 39.32% and 36.84%, respectively, upon heat treatment alone; this is attributable to the destruction of pore structure by sintering. In contrast, the corresponding values of the commercial activated carbons increased by 59.86% and 62.16%, respectively, upon heat treatment alone; this can be attributable to the development of microporosity. .
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This digital document is a journal article from Energy & Buildings, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
This paper describes the development of a thermally activated ceiling panel for incorporation in lightweight and retrofitted buildings. The system allows use of renewable energy sources for the heating and cooling of office and industrial buildings. The design for the new ceiling panel exploits the properties of the phase change material (PCM) paraffin. Its high thermal storage capacity during phase change-up to 300Wh/(m^2day)-enables the overall panel thickness to be limited to a mere 5cm. Active control of the thermal storage is achieved by means of an integrated water capillary tube system. The research project also included the development of a numerical model for computation of the thermal behavior of wall and ceiling systems incorporating PCMs. Simulation calculations were performed to determine the necessary thermal properties of the ceiling panels and specify requirements for the materials to be used. Laboratory tests were performed to verify the system's performance and a pilot application is soon to be tried out in practice. .
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This digital document is an article from Rubber World, published by Thomson Gale on May 1, 2006. The length of the article is 2912 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: An economical alternative to heat-activated pressure-sensitive tapes.
Author: Norman Mills
Publication:Rubber World (Magazine/Journal)
Date: May 1, 2006
Publisher: Thomson Gale
Volume: 234 Issue: 2 Page: 37(5)

Distributed by Thomson Gale.
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