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An infrared spectroscopic study of a hyperbranched, dendrimer‐like, polyester and its blends with poly(4‐vinyl phenol)
Author(s) -
Painter Paul C.,
Pruthtikul Rittirong,
Coleman Michael M.,
Tan Beck Nora
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991410107
Subject(s) - dendrimer , polyester , polymer chemistry , polymer , hydrogen bond , acetic anhydride , molecule , end group , infrared spectroscopy , materials science , linear polymer , functional group , chemistry , organic chemistry , copolymer , catalysis
A dendrimer‐like hyperbranched polyester is characterized by infrared spectroscopy. By converting and labeling the terminal groups by acetylation with 13 C acetic anhydride, the relative accessibility of core and terminal functional groups to solvents and linear polymers can be measured by counting the number of hydrogen bonds formed between the complementary functional groups found in these materials. The terminal groups form hydrogen bonds as readily as the same groups in linear polymers, but the core groups are highly screened. These results suggest that in these mixtures the dendrimer is extended, with the terminal groups located near the periphery of the molecule.