Effect of water-assisted extrusion and solid-state polymerization on the microstructure of PET/Clay nanocomposites

Download
  1. Get@NRC: Effect of water-assisted extrusion and solid-state polymerization on the microstructure of PET/Clay nanocomposites (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1002/pen.23685
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titlePolymer Engineering and Science
ISSN0032-3888
Volume54
Issue8
Pages17231736; # of pages: 14
SubjectDelamination; Microstructure; Molecular weight; Organoclay; Polymerization; Clay delamination; Cloisite 30b; Mechanical and barriers; Poly(ethylene terephthalate) (PET); Residence time; Solid state polymerization; Thermodynamic compatibility; Twin screw extruders; Nanocomposites
AbstractAn melt-mixing process has been used to prepare Poly(ethylene terephthalate) (PET)/clay nanocomposites with high degree of clay delamination. In this method, steam was fed into a twin-screw extruder (TSE) to reduce the PET molecular weight and to facilitate their diffusion into the gallery spacing of organoclays. Subsequently, the molecular weight (MW) reduction of the PET matrix due to hydrolysis by water was compensated by solid-state polymerization (SSP). The effect of the thermodynamic compatibility of PET and organoclays on the exfoliated microstructure of the nanocomposites was also examined by using three different nanoclays. The dispersion of Cloisite 30B (C30B) in PET was found to be better than that of Nanomer I.28E (I28E) and Cloisite Na+. The effect of feeding rate and consequently residence time on the properties of PET nanocomposites was also investigated. The results reveal more delamination of organoclay platelets in PET-C30B nanocomposites processed at low feeding rate compared to those processed at high feeding rate. Enhanced mechanical and barrier properties were observed in PET nanocomposites after SSP compared to the nanocomposites prepared by conventional melt-mixing. POLYM. ENG. SCI., 54:1723-1736, 2014.
Publication date
PublisherWiley
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21272778
Export citationExport as RIS
Report a correctionReport a correction
Record identifier11f3a4cc-b915-40b8-b00f-d7f7bd48e97e
Record created2014-12-03
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)