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Mechanical and Morphological Evaluation of the Reinforcement of Polycaprolactone With Different Cellulose Fibers
Author(s) -
Aguiar Vinicius O.,
de Fatima V Marques Maria
Publication year - 2018
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201800122
Subject(s) - cellulose , materials science , crystallinity , composite material , polycaprolactone , composite number , cellulose fiber , regenerated cellulose , polymer , dynamic mechanical analysis , fiber , modulus , chemical engineering , engineering
In the present work, polycaprolactone composites are prepared in a twin‐screw extruder with different amounts of cellulose fibers from several sources (obtained from lignocellulosic curauá and jute, commercial cellulose samples with different lengths, and amorphized cellulose obtained by ball milling), maintaining the processing time and temperature. X‐ray diffraction reveal that almost all cellulose fibers act as nucleating agents for the polymer matrix, resulting in increase crystallinity index of the composites. The experiments with the commercial cellulose fibers indicate that shorter fibers promoted stronger nucleation effect. At low content (2 wt%), the composite PCL‐amorphized cellulose has improve thermal resistance to degradation in relation to the neat PCL. Dynamic‐mechanical analysis shows an increase in the modulus of the composites containing 5 and 20 wt% fibers.