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Melt spinning and drawing of polyethylene nanocomposite fibers with organically modified hydrotalcite
Author(s) -
Fambri Luca,
Dabrowska Izabela,
Pegoretti Alessandro,
Ceccato Riccardo
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40277
Subject(s) - materials science , high density polyethylene , nanocomposite , composite material , exfoliation joint , ultimate tensile strength , polyethylene , thermal stability , hydrotalcite , composite number , extrusion , masterbatch , intercalation (chemistry) , crystallization , melt spinning , spinning , chemical engineering , graphene , chemistry , inorganic chemistry , biochemistry , engineering , nanotechnology , catalysis
Fibers of high density polyethylene (HDPE)/organically modified hydrotalcite (LDH) were produced by melt intercalation in a two‐step process consisting of twin‐screw extrusion and hot drawing. The optimum drawing temperature was 125°C at which the draw ratios up to 20 could be achieved. XRD analysis revealed intercalation with a high degree of exfoliation for the composites with 1–2% of LDH. Higher thermal stability of nanofilled fibers was confirmed by TGA analysis. DSC data indicated that dispersed LDH particles act as a nucleating agent. Crystallization kinetics of the HDPE matrix in the composite fibers is characterized by two transition temperatures, that is, for Regimes I/II at 123°C and for Regimes II/III ranging between 114–119°C as a function of the nanocomposite composition. Fibers with 1–2% of LDH show for the drawing ratios up to 15 a higher elastic modulus, 9.0–9.3 GPa (with respect to 8.0 GPa of the neat HDPE), maintain tensile strength of 0.8 GPa and deformation at break of 20–25%. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40277.