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Experimental and theoretical studies...

Lee, Byung Hwa.

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Experimental and theoretical studies of reactive extrusion process in twin screw extruders: Formation of polycaprolactam and block copolymers.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Experimental and theoretical studies of reactive extrusion process in twin screw extruders: Formation of polycaprolactam and block copolymers./
Author:	Lee, Byung Hwa.
Description:	341 p.
Notes:	Adviser: James L. White.
Contained By:	Dissertation Abstracts International62-07B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3019320
ISBN:	0493305106

Experimental and theoretical studies of reactive extrusion process in twin screw extruders: Formation of polycaprolactam and block copolymers.
Lee, Byung Hwa.

Experimental and theoretical studies of reactive extrusion process in twin screw extruders: Formation of polycaprolactam and block copolymers. - 341 p.

Adviser: James L. White.

Thesis (Ph.D.)--The University of Akron, 2001.

Twin screw extruders in the modern plastic industry possess greater effectiveness over the single screw extruder in applications such as pumping, compounding, blending, devolatilization, reactive processing and profile extrusion. Most of these machines now have modular design, allowing for greater flexibility.

ISBN: 0493305106Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Experimental and theoretical studies of reactive extrusion process in twin screw extruders: Formation of polycaprolactam and block copolymers.
LDR:03560nam 2200313 a 45 001 932837
005 20110505
008 110505s2001 eng d
020 $a 0493305106
035 $a (UnM)AAI3019320
035 $a AAI3019320
040 $a UnM $c UnM
100 1 $a Lee, Byung Hwa. $3 1256581
245 1 0 $a Experimental and theoretical studies of reactive extrusion process in twin screw extruders: Formation of polycaprolactam and block copolymers.
300 $a 341 p.
500 $a Adviser: James L. White.
500 $a Source: Dissertation Abstracts International, Volume: 62-07, Section: B, page: 3216.
502 $a Thesis (Ph.D.)--The University of Akron, 2001.
520 $a Twin screw extruders in the modern plastic industry possess greater effectiveness over the single screw extruder in applications such as pumping, compounding, blending, devolatilization, reactive processing and profile extrusion. Most of these machines now have modular design, allowing for greater flexibility.
520 $a Recently, the authors and their co-workers have given attention to comparative studies of the mixing characteristics of different continuous mixers. In this dissertation, first we described an extensive comparative experimental investigation of the caprolactam polymerization in a batch mixer and various twin screw extruders. We also computed the development of interfacial area along the screw axis in those twin screw extruders as the index of distributive mixing.
520 $a Mixing has been the focal point of many experimental studies in recent years, but advances in modeling and simulation now allow fast, accurate and useful simulation analysis. Numerous mixing indices have been developed but the majority are tailored to experimental studies. It is the second purpose of this dissertation to make a serious effort at modeling reactive extrusion process. A new mixing index, coefficient of interfacial area growth, was developed to quantitatively analyze distributive mixing of composite modular twin screw machines and further to predict the polymerization behavior of caprolactam in various twin screw extruders. Our approach is to compute the development of interfacial area for composite modular twin screw extruders and an internal mixer, and the mixing index was determined for each processing device.
520 $a Living anionic polymerization of lactams allows the ready formation of multiblock copolymers with polyamide endblocks. This includes macromolecules with soft flexible inner segments, which might act as thermoplastic elastomers. Polyamide thermoplastic elastomers at the present form the high cost and performance end of commercial thermoplastic elastomers and the potential for new monomers would seem significant. The last three chapters address the reactive extrusion based synthesis of new segmented block copolymers, which include polyamide as hard segment and poly (tetramethylene ether glycol) (PTMEG), polycaprolactone and both as soft segments. These tri-/ or penta-block copolymers were synthesized in a modular intermeshing counter-rotating twin screw extruder. The block copolymers were also melt-spun-into oriented filaments from the die of a twin screw extruder, indicating the possibility of one step processing from monomer to product.
590 $a School code: 0003.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Plastics Technology. $3 1023683
690 $a 0495
690 $a 0795
710 2 0 $a The University of Akron. $3 1018399
773 0 $t Dissertation Abstracts International $g 62-07B.
790 $a 0003
790 1 0 $a White, James L., $e advisor
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3019320