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Document Type

Open Access

Degree Program

Polymer Science & Engineering

Degree Name

Thesis (M.S.)

Year Degree Awarded

1981

Keywords

Butadiene, Polyurethanes

Abstract

Several segmented polyurethanes have been synthesized, based on a variety of hydroxyl-terminated polybutadienes (HTPB) , two of which included a free radically polymerized, branched polybutadiene with an average functionality of 2.1, and a hydrogenated derivative. The third was an anionically polymerized, high vinyl content polybutadiene with an average functionality of 1.9. Polyurethanes were prepared in bulk, without added catalyst, by a two-step process, where first the HTPB was endcapped with an excess of 2,4-toluenediisocyanate followed by chain extension by 1 , 4-butanediol . Series of samples of varying hard segment (urethane) content were prepared by this method.

DOI

https://doi.org/10.7275/3n8e-db16

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