Yield stress and chemical coupling in polypropylene-clay nanocomposite melts

Research output: ResearchConference contribution

Abstract

The coupling in polymer nanocomposites between the matrix and layered silicates can be enhanced by both functionalized polymer and by silane coupling agents. When applied to layered silicates, the choice of silane coupling agent is particularly critical. Some silanes move into the interlayer galleries and react with the gallery faces, leading to stronger intercalated structures. Other silanes react with the edges alone and as seen from recent results obtained in our laboratory lead to a greater degree of exfoliation as well. This paper presents the yield stress of polypropylene nanocomposites prepared with various compatibilizers and different loadings of silated and unsilated clay. The yield stress is estimated from dynamic shear tests on the nanocomposite melts with the help of van Gurp-Palmen plots of delta (or arctan (G″/G′)] vs. G*. The yield stress increases with the bound maleic anhydride fraction of the maleated polypropylene. The yield stress obtained with edge coupling and 5 wt% C-18 clay is 2200 Pa-more than twice the value without the edge coupling.

LanguageEnglish (US)
Title of host publicationAIChE Annual Meeting, Conference Proceedings
Pages13868
Number of pages1
StatePublished - 2005
Externally publishedYes
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

Profile

Silanes
Yield stress
Polypropylenes
Nanocomposites
Clay
Coupling agents
Silicates
Polymers
Compatibilizers
Maleic anhydride

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kumar, S., & Jayaraman, K. (2005). Yield stress and chemical coupling in polypropylene-clay nanocomposite melts. In AIChE Annual Meeting, Conference Proceedings (pp. 13868)

Yield stress and chemical coupling in polypropylene-clay nanocomposite melts. / Kumar, Sharad; Jayaraman, Krishnamurthy.

AIChE Annual Meeting, Conference Proceedings. 2005. p. 13868.

Research output: ResearchConference contribution

Kumar, S & Jayaraman, K 2005, Yield stress and chemical coupling in polypropylene-clay nanocomposite melts. in AIChE Annual Meeting, Conference Proceedings. pp. 13868, 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase, Cincinnati, OH, United States, 10/30/05.
Kumar S, Jayaraman K. Yield stress and chemical coupling in polypropylene-clay nanocomposite melts. In AIChE Annual Meeting, Conference Proceedings. 2005. p. 13868.
Kumar, Sharad ; Jayaraman, Krishnamurthy. / Yield stress and chemical coupling in polypropylene-clay nanocomposite melts. AIChE Annual Meeting, Conference Proceedings. 2005. pp. 13868
@inbook{38dda50dae3d43c3abc86ea0cecf5630,
title = "Yield stress and chemical coupling in polypropylene-clay nanocomposite melts",
abstract = "The coupling in polymer nanocomposites between the matrix and layered silicates can be enhanced by both functionalized polymer and by silane coupling agents. When applied to layered silicates, the choice of silane coupling agent is particularly critical. Some silanes move into the interlayer galleries and react with the gallery faces, leading to stronger intercalated structures. Other silanes react with the edges alone and as seen from recent results obtained in our laboratory lead to a greater degree of exfoliation as well. This paper presents the yield stress of polypropylene nanocomposites prepared with various compatibilizers and different loadings of silated and unsilated clay. The yield stress is estimated from dynamic shear tests on the nanocomposite melts with the help of van Gurp-Palmen plots of delta (or arctan (G″/G′)] vs. G*. The yield stress increases with the bound maleic anhydride fraction of the maleated polypropylene. The yield stress obtained with edge coupling and 5 wt% C-18 clay is 2200 Pa-more than twice the value without the edge coupling.",
author = "Sharad Kumar and Krishnamurthy Jayaraman",
year = "2005",
pages = "13868",
booktitle = "AIChE Annual Meeting, Conference Proceedings",

}

TY - CHAP

T1 - Yield stress and chemical coupling in polypropylene-clay nanocomposite melts

AU - Kumar,Sharad

AU - Jayaraman,Krishnamurthy

PY - 2005

Y1 - 2005

N2 - The coupling in polymer nanocomposites between the matrix and layered silicates can be enhanced by both functionalized polymer and by silane coupling agents. When applied to layered silicates, the choice of silane coupling agent is particularly critical. Some silanes move into the interlayer galleries and react with the gallery faces, leading to stronger intercalated structures. Other silanes react with the edges alone and as seen from recent results obtained in our laboratory lead to a greater degree of exfoliation as well. This paper presents the yield stress of polypropylene nanocomposites prepared with various compatibilizers and different loadings of silated and unsilated clay. The yield stress is estimated from dynamic shear tests on the nanocomposite melts with the help of van Gurp-Palmen plots of delta (or arctan (G″/G′)] vs. G*. The yield stress increases with the bound maleic anhydride fraction of the maleated polypropylene. The yield stress obtained with edge coupling and 5 wt% C-18 clay is 2200 Pa-more than twice the value without the edge coupling.

AB - The coupling in polymer nanocomposites between the matrix and layered silicates can be enhanced by both functionalized polymer and by silane coupling agents. When applied to layered silicates, the choice of silane coupling agent is particularly critical. Some silanes move into the interlayer galleries and react with the gallery faces, leading to stronger intercalated structures. Other silanes react with the edges alone and as seen from recent results obtained in our laboratory lead to a greater degree of exfoliation as well. This paper presents the yield stress of polypropylene nanocomposites prepared with various compatibilizers and different loadings of silated and unsilated clay. The yield stress is estimated from dynamic shear tests on the nanocomposite melts with the help of van Gurp-Palmen plots of delta (or arctan (G″/G′)] vs. G*. The yield stress increases with the bound maleic anhydride fraction of the maleated polypropylene. The yield stress obtained with edge coupling and 5 wt% C-18 clay is 2200 Pa-more than twice the value without the edge coupling.

UR - http://www.scopus.com/inward/record.url?scp=33645638667&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645638667&partnerID=8YFLogxK

M3 - Conference contribution

SP - 13868

BT - AIChE Annual Meeting, Conference Proceedings

ER -