Wood flour filled PP composites

Compatibilization and adhesion

Lívia Dányádi, Tünde Janecska, Zoltán Szabó, Gábor Nagy, J. Móczó, B. Pukánszky

Research output: Contribution to journalArticle

148 Citations (Scopus)

Abstract

PP/wood flour composites were prepared in a wide range of compositions in an internal mixer at 180 °C, 50 rpm and 15 min. Interfacial adhesion was modified by the introduction of two maleinated polypropylenes (MAPP) with different molecular weights and functionality. Wood content was changed between 0 and 70 wt%, while MAPP/wood ratio between 0 and 0.25. Compression molded plates of 1 mm thickness were prepared for testing. Structure was characterized by X-ray diffraction and DSC measurements. Interfacial adhesion was estimated quantitatively with model calculations. The results showed that the morphology of the components and that of the composites does not change as a result of compounding and the wood flour used in these experiments does not nucleate PP. The most important structural phenomena determining properties are the orientation of the anisotropic wood flour particles and their aggregation. Both structural phenomena depend on processing conditions and on the dimensions of the product. Much larger improvement could be achieved by the addition of a functionalized polymer in thicker samples than in thin specimens. MAPP has a maximum efficiency at around 0.05-0.10 MAPP/wood ratio in the composites of this study due to the limited surface available for coupling. MAPP with larger molecular weight and smaller functionality proved to be more advantageous in the improvement of composite strength, because it can form larger number of entanglements per molecule than the small molecular weight compound. On the other hand, the smaller molecular weight coupling agent decreases viscosity and improves processability considerably, thus optimization of composition is essential to achieve maximum performance.

Original languageEnglish
Pages (from-to)2838-2846
Number of pages9
JournalComposites Science and Technology
Volume67
Issue number13
DOIs
Publication statusPublished - Oct 2007

Fingerprint

Compatibilizers
Polypropylenes
Wood
Adhesion
Composite materials
Molecular weight
Coupling agents
Chemical analysis
Polymers
Compaction
Agglomeration
Viscosity
X ray diffraction
Molecules
Testing
Processing
Experiments

Keywords

  • A. Polymers
  • A. Wood
  • B. Interface
  • B. Particle-reinforced composites
  • Maleinated polypropylene

ASJC Scopus subject areas

  • Engineering(all)
  • Ceramics and Composites

Cite this

Wood flour filled PP composites : Compatibilization and adhesion. / Dányádi, Lívia; Janecska, Tünde; Szabó, Zoltán; Nagy, Gábor; Móczó, J.; Pukánszky, B.

In: Composites Science and Technology, Vol. 67, No. 13, 10.2007, p. 2838-2846.

Research output: Contribution to journalArticle

Dányádi, Lívia ; Janecska, Tünde ; Szabó, Zoltán ; Nagy, Gábor ; Móczó, J. ; Pukánszky, B. / Wood flour filled PP composites : Compatibilization and adhesion. In: Composites Science and Technology. 2007 ; Vol. 67, No. 13. pp. 2838-2846.
@article{9c2fd5fbd9314f188f803aafb10389d2,
title = "Wood flour filled PP composites: Compatibilization and adhesion",
abstract = "PP/wood flour composites were prepared in a wide range of compositions in an internal mixer at 180 °C, 50 rpm and 15 min. Interfacial adhesion was modified by the introduction of two maleinated polypropylenes (MAPP) with different molecular weights and functionality. Wood content was changed between 0 and 70 wt{\%}, while MAPP/wood ratio between 0 and 0.25. Compression molded plates of 1 mm thickness were prepared for testing. Structure was characterized by X-ray diffraction and DSC measurements. Interfacial adhesion was estimated quantitatively with model calculations. The results showed that the morphology of the components and that of the composites does not change as a result of compounding and the wood flour used in these experiments does not nucleate PP. The most important structural phenomena determining properties are the orientation of the anisotropic wood flour particles and their aggregation. Both structural phenomena depend on processing conditions and on the dimensions of the product. Much larger improvement could be achieved by the addition of a functionalized polymer in thicker samples than in thin specimens. MAPP has a maximum efficiency at around 0.05-0.10 MAPP/wood ratio in the composites of this study due to the limited surface available for coupling. MAPP with larger molecular weight and smaller functionality proved to be more advantageous in the improvement of composite strength, because it can form larger number of entanglements per molecule than the small molecular weight compound. On the other hand, the smaller molecular weight coupling agent decreases viscosity and improves processability considerably, thus optimization of composition is essential to achieve maximum performance.",
keywords = "A. Polymers, A. Wood, B. Interface, B. Particle-reinforced composites, Maleinated polypropylene",
author = "L{\'i}via D{\'a}ny{\'a}di and T{\"u}nde Janecska and Zolt{\'a}n Szab{\'o} and G{\'a}bor Nagy and J. M{\'o}cz{\'o} and B. Puk{\'a}nszky",
year = "2007",
month = "10",
doi = "10.1016/j.compscitech.2007.01.024",
language = "English",
volume = "67",
pages = "2838--2846",
journal = "Composites Science and Technology",
issn = "0266-3538",
publisher = "Elsevier BV",
number = "13",

}

TY - JOUR

T1 - Wood flour filled PP composites

T2 - Compatibilization and adhesion

AU - Dányádi, Lívia

AU - Janecska, Tünde

AU - Szabó, Zoltán

AU - Nagy, Gábor

AU - Móczó, J.

AU - Pukánszky, B.

PY - 2007/10

Y1 - 2007/10

N2 - PP/wood flour composites were prepared in a wide range of compositions in an internal mixer at 180 °C, 50 rpm and 15 min. Interfacial adhesion was modified by the introduction of two maleinated polypropylenes (MAPP) with different molecular weights and functionality. Wood content was changed between 0 and 70 wt%, while MAPP/wood ratio between 0 and 0.25. Compression molded plates of 1 mm thickness were prepared for testing. Structure was characterized by X-ray diffraction and DSC measurements. Interfacial adhesion was estimated quantitatively with model calculations. The results showed that the morphology of the components and that of the composites does not change as a result of compounding and the wood flour used in these experiments does not nucleate PP. The most important structural phenomena determining properties are the orientation of the anisotropic wood flour particles and their aggregation. Both structural phenomena depend on processing conditions and on the dimensions of the product. Much larger improvement could be achieved by the addition of a functionalized polymer in thicker samples than in thin specimens. MAPP has a maximum efficiency at around 0.05-0.10 MAPP/wood ratio in the composites of this study due to the limited surface available for coupling. MAPP with larger molecular weight and smaller functionality proved to be more advantageous in the improvement of composite strength, because it can form larger number of entanglements per molecule than the small molecular weight compound. On the other hand, the smaller molecular weight coupling agent decreases viscosity and improves processability considerably, thus optimization of composition is essential to achieve maximum performance.

AB - PP/wood flour composites were prepared in a wide range of compositions in an internal mixer at 180 °C, 50 rpm and 15 min. Interfacial adhesion was modified by the introduction of two maleinated polypropylenes (MAPP) with different molecular weights and functionality. Wood content was changed between 0 and 70 wt%, while MAPP/wood ratio between 0 and 0.25. Compression molded plates of 1 mm thickness were prepared for testing. Structure was characterized by X-ray diffraction and DSC measurements. Interfacial adhesion was estimated quantitatively with model calculations. The results showed that the morphology of the components and that of the composites does not change as a result of compounding and the wood flour used in these experiments does not nucleate PP. The most important structural phenomena determining properties are the orientation of the anisotropic wood flour particles and their aggregation. Both structural phenomena depend on processing conditions and on the dimensions of the product. Much larger improvement could be achieved by the addition of a functionalized polymer in thicker samples than in thin specimens. MAPP has a maximum efficiency at around 0.05-0.10 MAPP/wood ratio in the composites of this study due to the limited surface available for coupling. MAPP with larger molecular weight and smaller functionality proved to be more advantageous in the improvement of composite strength, because it can form larger number of entanglements per molecule than the small molecular weight compound. On the other hand, the smaller molecular weight coupling agent decreases viscosity and improves processability considerably, thus optimization of composition is essential to achieve maximum performance.

KW - A. Polymers

KW - A. Wood

KW - B. Interface

KW - B. Particle-reinforced composites

KW - Maleinated polypropylene

UR - http://www.scopus.com/inward/record.url?scp=34548068899&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548068899&partnerID=8YFLogxK

U2 - 10.1016/j.compscitech.2007.01.024

DO - 10.1016/j.compscitech.2007.01.024

M3 - Article

VL - 67

SP - 2838

EP - 2846

JO - Composites Science and Technology

JF - Composites Science and Technology

SN - 0266-3538

IS - 13

ER -