Budowa chemiczna i właściwości fizyczne usieciowanych poliuretanów segmentowych

H. Janik; A. Balas

Published : 2009-03-15

Vol. 54 No. 3 (2009)

Chemical structures and physical properties of cured segmental polyurethanes

H. Janik A. Balas

Abstract

Segmental polyurethanes (PUR) obtained in two-stage syntheses from oligomeric ?,?-dihydroxy(ethylene-butylene adipate) and two different aromatic diisocyanates: diphenylmethane 4,4'-diisocyanate (MDI) or MDI modified with carbodiimide diisocyanate were the subjects of investigations. For chain extending the curing triol 1,3-dihydroxy-2-(hydroxymethylene)propane (TMP) was used, besides typical 1,4-butanediol (Table 1). The chemical structures of PUR obtained were characterized by IR method (Table 4, Fig. 1). The effects of PUR compositions (type of diisocyanate, diol/triol ratio in the curing system and its amount) on the equilibrium swelling in dimethylformamide (Table 2 and 3) as well as mechanical properties (Table 5) were determined. The results were discussed from the point of view of peculiarity of structure of the network forming.

Keywords

poliuretany ; sieciowanie ; budowa chemiczna ; pęcznienie równowagowe ; właściwości mechaniczne przy rozciąganiu polyurethanes ; crosslinking ; chemical structure ; equilibrium swelling ; tensile properties

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Janik, H., & Balas, A. (2009). Chemical structures and physical properties of cured segmental polyurethanes. Polimery, 54(3), 195–201. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1190

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