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Syntheses and properties of pentaerythritol-containing urethane prepolymers and crosslinked films

✍ Scribed by Chin-Ping Yang; Lung-Ta Lee

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
508 KB
Volume
37
Category
Article
ISSN
0021-8995

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✦ Synopsis

T w o series of polyhydroxyl urethane-prepolymers (PrePU) were synthesized from pentaerythritol (PETH), toluene diisocyanate (TDI), and polyglycols (PG). One is a single molecular type of PETH-(TDI-PG),-TDI-PETH Pre-PU (S-PrePU). The other is a mixture of (PETH-TDI),-PETH and S-Pre-PU. The PrePU mixed with an equivalent triisocyanate regenerator (Desmodur AP-Stable, a crosslinking agent) were baked to form the crosslinked PU films. The mechanical properties such as tensile strengths, elongation at break, and viscoelasticities of PG-modified crosslinked f i l m s were studied.

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