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Investigation of the foaming charact...

Ramesh, Natarajan Subramanian.

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Investigation of the foaming characteristics of nucleation and growth of microcellular foams in polystyrene containing low glass transition particles.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Investigation of the foaming characteristics of nucleation and growth of microcellular foams in polystyrene containing low glass transition particles./
Author:	Ramesh, Natarajan Subramanian.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 1993,
Description:	169 p.
Notes:	Source: Dissertations Abstracts International, Volume: 54-12, Section: B.
Contained By:	Dissertations Abstracts International54-12B.
Subject:	Chemical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9311981

Investigation of the foaming characteristics of nucleation and growth of microcellular foams in polystyrene containing low glass transition particles.
Ramesh, Natarajan Subramanian.

Investigation of the foaming characteristics of nucleation and growth of microcellular foams in polystyrene containing low glass transition particles. - Ann Arbor : ProQuest Dissertations & Theses, 1993 - 169 p.

Source: Dissertations Abstracts International, Volume: 54-12, Section: B.

Thesis (Ph.D.)--Clarkson University, 1993.

This item must not be sold to any third party vendors.

This work describes the evaluations of a new method to control nucleation and cell growth in microcellular polystyrene foams. It was determined that the nucleation in microcellular foam can be controlled by the addition of from 10$\\sp8$ to 10$\\sp $ rubber particles per cubic centimeter of unfoamed polymer. A new nucleation theory based on thermal activation of voids in the rubber particles has been developed. The prediction of this theory correlate with experimental data for the parameters of saturation pressure, foaming temperature, number of particles, particle size and particle size distribution. In addition to the investigation of nucleation, bubble growth was investigated from an experimental view point. Examination of the literature indicated that there were many models but little data. The results were compared with the Newtonian cell model originally proposed by Amon and Denson and a viscoelastic cell model later introduced by Arefmanesh and Advani. The predictions of the viscoelastic cell model were found to best fit the data. Data were obtained for both nitrogen and carbon dioxide as blowing agents and foaming was carried out at several saturation pressures and temperatures. In all cases the model seemed to correlate well with the experimental data.Subjects--Topical Terms:

560457
Chemical engineering.

Investigation of the foaming characteristics of nucleation and growth of microcellular foams in polystyrene containing low glass transition particles.
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100 1 $a Ramesh, Natarajan Subramanian. $3 3546433
245 1 0 $a Investigation of the foaming characteristics of nucleation and growth of microcellular foams in polystyrene containing low glass transition particles.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1993
300 $a 169 p.
500 $a Source: Dissertations Abstracts International, Volume: 54-12, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Campbell, Gregory A.
502 $a Thesis (Ph.D.)--Clarkson University, 1993.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a This work describes the evaluations of a new method to control nucleation and cell growth in microcellular polystyrene foams. It was determined that the nucleation in microcellular foam can be controlled by the addition of from 10$\\sp8$ to 10$\\sp $ rubber particles per cubic centimeter of unfoamed polymer. A new nucleation theory based on thermal activation of voids in the rubber particles has been developed. The prediction of this theory correlate with experimental data for the parameters of saturation pressure, foaming temperature, number of particles, particle size and particle size distribution. In addition to the investigation of nucleation, bubble growth was investigated from an experimental view point. Examination of the literature indicated that there were many models but little data. The results were compared with the Newtonian cell model originally proposed by Amon and Denson and a viscoelastic cell model later introduced by Arefmanesh and Advani. The predictions of the viscoelastic cell model were found to best fit the data. Data were obtained for both nitrogen and carbon dioxide as blowing agents and foaming was carried out at several saturation pressures and temperatures. In all cases the model seemed to correlate well with the experimental data.
590 $a School code: 0049.
650 4 $a Chemical engineering. $3 560457
650 4 $a Plastics. $3 649803
650 4 $a Packaging. $3 585030
690 $a 0542
690 $a 0795
690 $a 0549
710 2 $a Clarkson University. $3 1020943
773 0 $t Dissertations Abstracts International $g 54-12B.
790 $a 0049
791 $a Ph.D.
792 $a 1993
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9311981