Rheological study of the influence of MW and comonomer type on the miscibility of m-LLDPE and LDPE blends

Tayyab Hameed; Ibnelwaleed A. Hussein

doi:10.1016/S0032-3861(02)00627-4

Rheological study of the influence of M_W and comonomer type on the miscibility of m-LLDPE and LDPE blends

Tayyab Hameed
, Ibnelwaleed A. Hussein^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

79 Scopus citations

Abstract

The influences of molecular weight and m-LLDPE comonomer type on the miscibility of m-LLDPE with LDPE in the melt state were investigated with rheological methods. Dynamic, steady shear and transient measurements were carried out in an ARES rheometer at 190 °C. The M_w of the shortly branched m-LLDPE has influenced its miscibility with LDPE and immiscibility has increased with the increase in M_w of m-LLDPE. The miscibility of the high-M_w m-LLDPE with LDPE was non-symmetric with respect to composition as revealed by the dependence of their η₀ η′(ω), G′, N₁(γ), and N₁(t) on blend composition. Addition of a small amount of the hexene m-LLDPE to LDPE was more likely to cause immiscibility than the addition of a small amount of LDPE to m-LLDPE. Increasing the m-LLDPE branch length (comonomer) from butene to hexene did not influence the miscibility of m-LLDPE/LDPE blends. Agreement was observed between the measured rheology and theoretical predictions of Einstein, Scholz et al., Palieme and Bousmina emulsion models. The ratio of interfacial tension to droplet radius was estimated to be ∼ 10³ N/m².

Original language	English
Pages (from-to)	6911-6929
Number of pages	19
Journal	Polymer
Volume	43
Issue number	25
DOIs	https://doi.org/10.1016/S0032-3861(02)00627-4
State	Published - 28 Oct 2002

Bibliographical note

Funding Information:
Financial support for this project was provided by KFUPM under project # CHE/Rheology/223. Authors are thankful to Professor Abdullah A. Shaikh, former chairman of the Chemical Engineering Department for his support and help in establishing the Polymer Research Lab at the Chemical Engineering Department. We are thankful to Mr Willy Leysen of ExxonMobil, Belgium for providing polyethylene samples. We are also grateful to Dr Naseem Akhtar for his help with the GPC characterization.

Keywords

Miscibility
Polyethylene blend
Rheology

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

Access to Document

10.1016/S0032-3861(02)00627-4

Cite this

@article{e796488ea9ce471fa1c4709f35b70487,

title = "Rheological study of the influence of MW and comonomer type on the miscibility of m-LLDPE and LDPE blends",

abstract = "The influences of molecular weight and m-LLDPE comonomer type on the miscibility of m-LLDPE with LDPE in the melt state were investigated with rheological methods. Dynamic, steady shear and transient measurements were carried out in an ARES rheometer at 190 °C. The Mw of the shortly branched m-LLDPE has influenced its miscibility with LDPE and immiscibility has increased with the increase in Mw of m-LLDPE. The miscibility of the high-Mw m-LLDPE with LDPE was non-symmetric with respect to composition as revealed by the dependence of their η0 η′(ω), G′, N1(γ), and N1(t) on blend composition. Addition of a small amount of the hexene m-LLDPE to LDPE was more likely to cause immiscibility than the addition of a small amount of LDPE to m-LLDPE. Increasing the m-LLDPE branch length (comonomer) from butene to hexene did not influence the miscibility of m-LLDPE/LDPE blends. Agreement was observed between the measured rheology and theoretical predictions of Einstein, Scholz et al., Palieme and Bousmina emulsion models. The ratio of interfacial tension to droplet radius was estimated to be ∼ 103 N/m2.",

keywords = "Miscibility, Polyethylene blend, Rheology",

author = "Tayyab Hameed and Hussein, \{Ibnelwaleed A.\}",

note = "Funding Information: Financial support for this project was provided by KFUPM under project \# CHE/Rheology/223. Authors are thankful to Professor Abdullah A. Shaikh, former chairman of the Chemical Engineering Department for his support and help in establishing the Polymer Research Lab at the Chemical Engineering Department. We are thankful to Mr Willy Leysen of ExxonMobil, Belgium for providing polyethylene samples. We are also grateful to Dr Naseem Akhtar for his help with the GPC characterization. ",

year = "2002",

month = oct,

day = "28",

doi = "10.1016/S0032-3861(02)00627-4",

language = "English",

volume = "43",

pages = "6911--6929",

journal = "Polymer",

issn = "0032-3861",

number = "25",

}

TY - JOUR

T1 - Rheological study of the influence of MW and comonomer type on the miscibility of m-LLDPE and LDPE blends

AU - Hameed, Tayyab

AU - Hussein, Ibnelwaleed A.

N1 - Funding Information: Financial support for this project was provided by KFUPM under project # CHE/Rheology/223. Authors are thankful to Professor Abdullah A. Shaikh, former chairman of the Chemical Engineering Department for his support and help in establishing the Polymer Research Lab at the Chemical Engineering Department. We are thankful to Mr Willy Leysen of ExxonMobil, Belgium for providing polyethylene samples. We are also grateful to Dr Naseem Akhtar for his help with the GPC characterization.

PY - 2002/10/28

Y1 - 2002/10/28

N2 - The influences of molecular weight and m-LLDPE comonomer type on the miscibility of m-LLDPE with LDPE in the melt state were investigated with rheological methods. Dynamic, steady shear and transient measurements were carried out in an ARES rheometer at 190 °C. The Mw of the shortly branched m-LLDPE has influenced its miscibility with LDPE and immiscibility has increased with the increase in Mw of m-LLDPE. The miscibility of the high-Mw m-LLDPE with LDPE was non-symmetric with respect to composition as revealed by the dependence of their η0 η′(ω), G′, N1(γ), and N1(t) on blend composition. Addition of a small amount of the hexene m-LLDPE to LDPE was more likely to cause immiscibility than the addition of a small amount of LDPE to m-LLDPE. Increasing the m-LLDPE branch length (comonomer) from butene to hexene did not influence the miscibility of m-LLDPE/LDPE blends. Agreement was observed between the measured rheology and theoretical predictions of Einstein, Scholz et al., Palieme and Bousmina emulsion models. The ratio of interfacial tension to droplet radius was estimated to be ∼ 103 N/m2.

AB - The influences of molecular weight and m-LLDPE comonomer type on the miscibility of m-LLDPE with LDPE in the melt state were investigated with rheological methods. Dynamic, steady shear and transient measurements were carried out in an ARES rheometer at 190 °C. The Mw of the shortly branched m-LLDPE has influenced its miscibility with LDPE and immiscibility has increased with the increase in Mw of m-LLDPE. The miscibility of the high-Mw m-LLDPE with LDPE was non-symmetric with respect to composition as revealed by the dependence of their η0 η′(ω), G′, N1(γ), and N1(t) on blend composition. Addition of a small amount of the hexene m-LLDPE to LDPE was more likely to cause immiscibility than the addition of a small amount of LDPE to m-LLDPE. Increasing the m-LLDPE branch length (comonomer) from butene to hexene did not influence the miscibility of m-LLDPE/LDPE blends. Agreement was observed between the measured rheology and theoretical predictions of Einstein, Scholz et al., Palieme and Bousmina emulsion models. The ratio of interfacial tension to droplet radius was estimated to be ∼ 103 N/m2.

KW - Miscibility

KW - Polyethylene blend

KW - Rheology

UR - https://www.scopus.com/pages/publications/0037190728

U2 - 10.1016/S0032-3861(02)00627-4

DO - 10.1016/S0032-3861(02)00627-4

M3 - Article

AN - SCOPUS:0037190728

SN - 0032-3861

VL - 43

SP - 6911

EP - 6929

JO - Polymer

JF - Polymer

IS - 25

ER -