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Rheology, processing, structure form...

Lu, Guangyu.

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Rheology, processing, structure formation and mechanical properties of a medical-grade thermoplastic polyurethane and its suspensions.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Rheology, processing, structure formation and mechanical properties of a medical-grade thermoplastic polyurethane and its suspensions./
Author:	Lu, Guangyu.
Description:	290 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2295.
Contained By:	Dissertation Abstracts International64-05B.
Subject:	Engineering, Chemical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3088823
ISBN:	9780496365623

Rheology, processing, structure formation and mechanical properties of a medical-grade thermoplastic polyurethane and its suspensions.
Lu, Guangyu.

Rheology, processing, structure formation and mechanical properties of a medical-grade thermoplastic polyurethane and its suspensions. - 290 p.

Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2295.

Thesis (Ph.D.)--Stevens Institute of Technology, 2003.

Thermoplastic polyurethane (TPU) and BaSO4 filled TPU possess outstanding combinations of physical properties, blood compatibility, X-ray trace-ability and processability advantages in comparison to other commercial polymers. As a result, TPU is widely used in the medical devices industry, preferably without any additives. However, the selection of operating conditions and geometry for the processing of TPU and BaSO4 filled TPU is a complicated task. This complication arises from the thermal and oxidative degradation and curing of TPU under relatively high temperatures and residence times, its rapid hydrolysis when moisture is present and the continuing development and modification of the hard/soft block morphology upon processing at temperatures lower than the melting temperature. When compounded with the x-ray tracer BaSO4 additional complications involving development of viscoplasticity, dilatancy, wall slip, formation of surface irregularities and the entrainment of air occur. In this thesis an integrated investigation of the rheology, wall slip, single and twin screw extrusion, co-extrusion, structure development and the mechanical properties of a medical-grade TPU and its BaSO4 filled composites has been carried out. This investigation is anticipated to be very helpful to the medical devices industry in general and to the processing of thermoplastic urethanes in particular.

ISBN: 9780496365623Subjects--Topical Terms:

1018531
Engineering, Chemical.

Rheology, processing, structure formation and mechanical properties of a medical-grade thermoplastic polyurethane and its suspensions.
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245 1 0 $a Rheology, processing, structure formation and mechanical properties of a medical-grade thermoplastic polyurethane and its suspensions.
300 $a 290 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2295.
500 $a Chair: Dilhan M. Kalyon.
502 $a Thesis (Ph.D.)--Stevens Institute of Technology, 2003.
520 $a Thermoplastic polyurethane (TPU) and BaSO4 filled TPU possess outstanding combinations of physical properties, blood compatibility, X-ray trace-ability and processability advantages in comparison to other commercial polymers. As a result, TPU is widely used in the medical devices industry, preferably without any additives. However, the selection of operating conditions and geometry for the processing of TPU and BaSO4 filled TPU is a complicated task. This complication arises from the thermal and oxidative degradation and curing of TPU under relatively high temperatures and residence times, its rapid hydrolysis when moisture is present and the continuing development and modification of the hard/soft block morphology upon processing at temperatures lower than the melting temperature. When compounded with the x-ray tracer BaSO4 additional complications involving development of viscoplasticity, dilatancy, wall slip, formation of surface irregularities and the entrainment of air occur. In this thesis an integrated investigation of the rheology, wall slip, single and twin screw extrusion, co-extrusion, structure development and the mechanical properties of a medical-grade TPU and its BaSO4 filled composites has been carried out. This investigation is anticipated to be very helpful to the medical devices industry in general and to the processing of thermoplastic urethanes in particular.
590 $a School code: 0733.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Plastics Technology. $3 1023683
650 4 $a Engineering, Biomedical. $3 1017684
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710 2 0 $a Stevens Institute of Technology. $3 1019501
773 0 $t Dissertation Abstracts International $g 64-05B.
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790 $a 0733
791 $a Ph.D.
792 $a 2003
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