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Gelatin films with very high surface hardness
Author(s) -
Vassileva Elena,
BaltáCalleja Francisco J.,
Cagiao M. Esperanza,
Fakirov Stoyko
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19980901)19:9<451::aid-marc451>3.0.co;2-c
Subject(s) - gelatin , indentation hardness , materials science , polymer , composite material , hardness , polymer chemistry , microstructure , chemistry , organic chemistry
Microhardness ( H ) of gelatin dry cast films was measured in the 100–250°C range. A strong H increase with temperature from 330 MPa up to 450 MPa was observed in the first cycle. The H values reached in the subsequent cycles are higher than those obtained in the preceding ones, surpassing the hardness of all commercial synthetic polymers and soft metals. Results are discussed in terms of crosslinking between side‐chain reactive groups.