Variations related to the thermal behavior and morphology of isotactic poly
propylenes (i-PP) with p-phenylen-bis-maleamic acid groups are studied in t
his work. Changes in peak temperatures and crystalline levels are discussed
on the basis of not only the grafting degree of each sample but also of th
e experimental conditions used to obtain them. A secondary crystallization
phenomenon is found to emerge from the second fusion scan, and confirmed by
morphological studies. An explanation of this phenomenon is established on
the basis of the grafted groups bonded in the polypropylene macromolecular
backbone. (C) 2000 Elsevier Science Ltd. All rights reserved.