Surface modification of segmented polyurethanes via oligomeric end groups incorporated during synthesis

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:126882

White, K A; Ward, R S; Wolcott, C A ^[1]

---

1. Polymer Technology Group Inc., Emeryville, CA (United States); and others

We have investigated a method of modifying polymer surfaces in which surface-active oligomeric chains are appended to a base polymer or copolymer during synthesis. The method does not use additives or post-fabrication treatments of formed articles to affect a significant change in surface chemistry. Since each polymer molecule contains the surface-modifying moieties they are readily available to assemble as overlayers at the polymer interface. A series of polyurethaneureas were synthesized with hydrocarbon, silicone, fluorocarbon and polyether surface-modifying end groups (SME). Cast films were characterized by water contact angle, electron spectroscopy for chemical analysis (ESCA) and tensile properties. Product polyurethaneureas were all tough elastomers with {>=} 4000 psi tensile strength and high ultimate elongation. Contact angle and ESCA indicate that the surface of the films were altered as expected from the chemical structure of the SME, when compared to a control with diethyl end groups.

• OSTI ID: 126882
• Report Number(s): CONF-950402--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADDITIVES
CHEMICAL ANALYSIS
ELECTRON SPECTROSCOPY
POLYURETHANES
SURFACE PROPERTIES
TENSILE PROPERTIES