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Low‐density polyethylene modified by thermal polymerization of 4‐vinylpyridine and methyl methacrylate: Structural studies
Author(s) -
De Barros Glaucione Gomes,
Sales Maria José Araújo,
De Britto Ana Regina Feitosa
Publication year - 1996
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.10505
Subject(s) - low density polyethylene , materials science , polyethylene , polymerization , methyl methacrylate , scanning electron microscope , composite material , polymer chemistry , in situ polymerization , chemical engineering , polymer , engineering
The structures of low‐density polyethylene (LDPE) modified by in situ sorption and thermal polymerization of 4‐vinylpyridine (4VP) and of methyl methacrylate (MMA) were studied. The phase behavior of these materials was investigated by means of X‐ray diffraction, scanning electron microscopy (SEM), and by thermal measurements (DSC). The diffraction studies indicated that the polymerization occurs at the amorphous domains of the matrix, except for the case of 4VP (168.0%), in which polymerization at the crystalline domains of LDPE matrix was also observed. These materials showed at least two T g values, indicating microphase separation. The morphology of LDPE‐P4VP was different from that of LDPE‐PMMA.