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Polyurethane–polypropylene blends
Author(s) -
Petrović Zoran S.,
BudinskiSimendić Jaroslava,
Divjaković Vladimir
Publication year - 1991
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1991.070420321
Subject(s) - polypropylene , polyurethane , materials science , polyol , rheology , agglomerate , morphology (biology) , composite material , mixing (physics) , butanediol , polymer chemistry , chemical engineering , polymer science , chemistry , organic chemistry , genetics , physics , quantum mechanics , fermentation , engineering , biology
Abstract Five series of blends were obtained by mixing five polyurethanes (PUR), based on poly‐propyleneoxide, MDI, and butanediol, with polypropylene (PP). The structure of PUR was varied by varying soft segment length (MW = 1000 and 2000) and soft segment concentration (50, 60, and 70%). It has been shown that interaction between PUR and PP was better in the case of PUR with the polyol of MW = 1000. The addition of lower molecular weight PUR produced an easy flowing material in the molten state, comparable with the “control rheology PP.” The morphology of the blends changed with PUR concentration. At 30% PUR the dispersed phase tended to agglomerate in the form of long cylinders. Mechanical properties generally were affected by the change of morphology.