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Processing behavior of polycarbonate/functionalized‐ethylene copolymer blends
Author(s) -
Dias Marcos L.,
Fernandes Maria Josumitra A.
Publication year - 2000
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11379
Subject(s) - polycarbonate , materials science , copolymer , polymer , fourier transform infrared spectroscopy , chloroform , polymer chemistry , chemical engineering , sodium carbonate , degradation (telecommunications) , ethylene , methacrylic acid , sodium , catalysis , organic chemistry , composite material , chemistry , telecommunications , computer science , engineering , metallurgy
The melt blending of polycarbonate (PC) and ethylene‐methacrylic acid copolymers (EFC) either in the acid form (EFC‐H) or partially neutralized with sodium (EFC‐Na) or zinc (EFC‐Zn) was investigated. Torque monitoring of the blending showed that the polymers are capable of reacting generating new chemical species that increase the melt viscosity. As general behavior, the torque curves pass by a maximum that takes place before 30 min, the final torque being higher than that of the individual polymers. SEC analyses reveal that PC degradation also occurs and is stronger in the case of blends with EFC‐Na that acts to catalyze PC degradation, promoting CO 2 formation. FTIR studies on chloroform insoluble fractions of the PC/EFC‐Zn blends showed that in addition to a very small number of carbonate groups, feature absorption bands of aromatic ester and hydroxyl groups appear in the new chemical species formed during the reactive processing.