Relationship between microstructure and properties of false-twist textured and stabilized polylactide. Part 1: dimensional stability, mechanical properties and thermomechanical behavior

• Published in: Textile research journal Vol. 83; no. 10; pp. 1055 - 1064
• Main Authors: Cayuela, Diana, Montero, Lucila, Riba, Marta, Prieto, Remedios, Cano, Francesc, Manich, Albert M
• Format: Journal Article Publication
• Language: English
• Published: London, England SAGE Publications 01-06-2013; Sage Publications Ltd
• Subjects: Chambers; Correlation analysis; Crystal orientation; Crystallinity; Dimensional stability; Enginyeria química; Enginyeria tèxtil; Fibres sintètiques; Fibres tèxtils; Fibres tèxtils sintètiques; Indústries químiques; Investigació; Mechanical properties; Microstructure; Orientation; Polyesters; Polylactides; Polymers; Química tèxtil; Series & special reports; Shrinkage; Studies; Technological innovations; Textile fibers; Textile fibers, Synthetic; Textiles; Texturing; Àrees temàtiques de la UPC; orientation; crystallinity; relaxation shrinkage; Polylactide; thermomechanical behavior; mechanical properties
• ISSN: 0040-5175; 1746-7748
• DOI: 10.1177/0040517512474360

Polylactide fibers (PLA), false-twist textured at different temperatures (135, 150 and 165℃) and draw ratios (1.30, 1.35 and 1.40) were stabilized by a continuous setting treatment at 50 m/min and 100℃ using a specially designed chamber. The crystallinity and the orientation of the original textured filaments and those of the stabilized ones were measured. The effect of post setting on the dimensional stability, mechanical properties and thermomechanical behavior in accordance with the texturing conditions was studied. The relationships between crystallinity and the dimensional stability and between the orientation and both the relaxation shrinkage and the endset temperature of shrinkage were considered.