Extrusion of linear polypropylene-clay nanocomposite foams

Amit Kumar Chaudhary, Krishnamurthy Jayaraman

Research output: Contribution to journalArticle

  • 29 Citations

Abstract

This work presents new results on using organoclay with an appropriate polymeric compatibilizer as rheology-modifying additives for extrusion foaming of a linear polypropylene (PP), which by itself does not display strain hardening in extensional flow of the melt. The uniaxial melt-extensional viscosity behavior of several nanocomposites prepared with varying ratio of bound maleic anhydride to clay as well as varying compatibilizer molecular weight was investigated. A chemical-blowing agent was used at a fixed concentration for foaming these nanocomposites in a single-screw extruder. Among nanocomposites with similar levels of clay dispersion or intercalation, the ones that displayed significant strain hardening in the melt state along with slower crystallization led to extruded PP nanocomposite foams with smaller cell sizes and greater cell density by reducing cell coalescence. This was achieved with as little as 3 wt% organoclay and a high-molecular weight PP-g-MA compatibilizer in linear PP. POLYM. ENG. SCI., 2011.

LanguageEnglish (US)
Pages1749-1756
Number of pages8
JournalPolymer Engineering and Science
Volume51
Issue number9
DOIs
StatePublished - Sep 2011

Profile

Polypropylenes
Extrusion
Foams
Compatibilizers
Nanocomposites
Clay
Organoclay
Strain hardening
Molecular weight
Maleic Anhydrides
Blowing agents
Maleic anhydride
Extruders
Intercalation
Crystallization
Coalescence
Rheology
Viscosity
clay

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Chemistry(all)

Cite this

Extrusion of linear polypropylene-clay nanocomposite foams. / Chaudhary, Amit Kumar; Jayaraman, Krishnamurthy.

In: Polymer Engineering and Science, Vol. 51, No. 9, 09.2011, p. 1749-1756.

Research output: Contribution to journalArticle

@article{26de8f957683468aa3b03a778cf142f7,
title = "Extrusion of linear polypropylene-clay nanocomposite foams",
abstract = "This work presents new results on using organoclay with an appropriate polymeric compatibilizer as rheology-modifying additives for extrusion foaming of a linear polypropylene (PP), which by itself does not display strain hardening in extensional flow of the melt. The uniaxial melt-extensional viscosity behavior of several nanocomposites prepared with varying ratio of bound maleic anhydride to clay as well as varying compatibilizer molecular weight was investigated. A chemical-blowing agent was used at a fixed concentration for foaming these nanocomposites in a single-screw extruder. Among nanocomposites with similar levels of clay dispersion or intercalation, the ones that displayed significant strain hardening in the melt state along with slower crystallization led to extruded PP nanocomposite foams with smaller cell sizes and greater cell density by reducing cell coalescence. This was achieved with as little as 3 wt{\%} organoclay and a high-molecular weight PP-g-MA compatibilizer in linear PP. POLYM. ENG. SCI., 2011.",
author = "Chaudhary, {Amit Kumar} and Krishnamurthy Jayaraman",
year = "2011",
month = "9",
doi = "10.1002/pen.21961",
language = "English (US)",
volume = "51",
pages = "1749--1756",
journal = "Polymer Engineering and Science",
issn = "0032-3888",
publisher = "John Wiley and Sons Inc.",
number = "9",

}

TY - JOUR

T1 - Extrusion of linear polypropylene-clay nanocomposite foams

AU - Chaudhary,Amit Kumar

AU - Jayaraman,Krishnamurthy

PY - 2011/9

Y1 - 2011/9

N2 - This work presents new results on using organoclay with an appropriate polymeric compatibilizer as rheology-modifying additives for extrusion foaming of a linear polypropylene (PP), which by itself does not display strain hardening in extensional flow of the melt. The uniaxial melt-extensional viscosity behavior of several nanocomposites prepared with varying ratio of bound maleic anhydride to clay as well as varying compatibilizer molecular weight was investigated. A chemical-blowing agent was used at a fixed concentration for foaming these nanocomposites in a single-screw extruder. Among nanocomposites with similar levels of clay dispersion or intercalation, the ones that displayed significant strain hardening in the melt state along with slower crystallization led to extruded PP nanocomposite foams with smaller cell sizes and greater cell density by reducing cell coalescence. This was achieved with as little as 3 wt% organoclay and a high-molecular weight PP-g-MA compatibilizer in linear PP. POLYM. ENG. SCI., 2011.

AB - This work presents new results on using organoclay with an appropriate polymeric compatibilizer as rheology-modifying additives for extrusion foaming of a linear polypropylene (PP), which by itself does not display strain hardening in extensional flow of the melt. The uniaxial melt-extensional viscosity behavior of several nanocomposites prepared with varying ratio of bound maleic anhydride to clay as well as varying compatibilizer molecular weight was investigated. A chemical-blowing agent was used at a fixed concentration for foaming these nanocomposites in a single-screw extruder. Among nanocomposites with similar levels of clay dispersion or intercalation, the ones that displayed significant strain hardening in the melt state along with slower crystallization led to extruded PP nanocomposite foams with smaller cell sizes and greater cell density by reducing cell coalescence. This was achieved with as little as 3 wt% organoclay and a high-molecular weight PP-g-MA compatibilizer in linear PP. POLYM. ENG. SCI., 2011.

UR - http://www.scopus.com/inward/record.url?scp=80051685824&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80051685824&partnerID=8YFLogxK

U2 - 10.1002/pen.21961

DO - 10.1002/pen.21961

M3 - Article

VL - 51

SP - 1749

EP - 1756

JO - Polymer Engineering and Science

T2 - Polymer Engineering and Science

JF - Polymer Engineering and Science

SN - 0032-3888

IS - 9

ER -