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Chain Features and Their Influence on the Thermal Stability of Poly(propylene‐ co ‐1‐nonene) Copolymers
Author(s) -
Qiong Diana,
GarcíaPeñas Alberto,
BarrancoGarcía Rosa,
Cerrada María Luisa,
Benavente Rosario,
Pérez Ernesto,
GómezElvira José Manuel
Publication year - 2019
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201900175
Subject(s) - tacticity , thermogravimetric analysis , copolymer , thermal stability , polymer chemistry , activation energy , chain scission , materials science , microstructure , degradation (telecommunications) , chemical engineering , polymer , chemistry , composite material , organic chemistry , polymerization , telecommunications , computer science , engineering
The thermal stability of several isotactic polypropylenes and propylene‐ co ‐1‐nonene copolymers is assessed under nitrogen by means of thermogravimetric analysis (TGA). The samples involve wide ranges of molecular weight, isotactic average length, and 1‐nonene content, in order to perform a comprehensive analysis of the effect that chain features exert on the apparent activation energy ( E a ), in the initial stages of the molten state degradation. The degradation process correlates with chain mobility and, accordingly, with chain features that are linked to. Thus, microstructure and chain size are found to play a key role. In fact, isotactic average length of propylene sequences and molecular weight are driving factors in the E a required for main chain thermal scission.