Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide.

Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Research Abstract Details 

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Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Abstract Text:

A Z Okkema,T G Grasel,R J Zdrahala,D D Solomon,S L Cooper,

The bulk, surface, and blood-contacting properties of a series of polyether polyurethanes based on polyethylene oxide (PEO) (MW = 1450), polytetramethylene oxide (PTMO) (MW = 1000), and mixed PEO/PTMO soft segments were evaluated. The effect of varying the weight percentage of PEO, and thus the overall polarity of the mixed soft segment phase, was investigated. Two polymer blends prepared from a PTMO-based and a PEO-based polyurethane were also studied. Differential scanning calorimetry (DSC) and dynamic mechanical analysis indicated that the polyurethanes based on either the PEO or the PTMO soft segments are relatively phase mixed. The degree of phase mixing in the polymers increased with increasing weight fraction of PEO. As expected, water absorption and the hydrophilicity of the polymer increased with increasing PEO soft segment content. In vacuum, the PEO-rich polymers have a lower concentration of soft segment at the surface, possibly due to the migration of the polar PEO segments away from the polymer/vacuum interface. The blood-contacting results indicated that the higher PEO-containing polymers were more thrombogenic than the pure PTMO-based polyurethane. A threshold concentration of PEO in the polyurethane appeared to be required before the blood-contacting properties were significantly affected.

Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Publishing Authors By Initials

AZ Okkema,TG Grasel,RJ Zdrahala,DD Solomon,SL Cooper,

For similar natural sciences: physics: thermodynamics research abstracts see: natural sciences: physics: thermodynamics research

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Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Journal of biomaterials science. Polymer edition

VOLUME: 1

Page Numbers: 43-62

Journal Abbreviation:

ISSN: 0920-5063

DAY: 20

MONTH: 02

YEAR: 1989

Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9007393

Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Keywords Mesh Terms:

KEYWORDS: Thermodynamics

MESH TERMS: chemistry

Chemical & Substance for Abstract: Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide. Information

Substance Name: Fibrinogen

Registry Number: 9001-32-5

Grant and Affiliation Information for Bulk, surface, and blood-contacting properties of polyetherurethanes modified with polyethylene oxide.

AFFILIATION: Material Science Program, University of Wisconsin, Madison 53706.

Country: NETHERLANDS

AGENCY: United States NHLBI

GRANT: HL-24046

ACRONYM: HL

MEDLINETA: J Biomater Sci Polym Ed

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