Citation
Khairul Zaman M. D., . and Khalina A., . and Jalaludin Harun, . (2008) Rheology of oil palm empty fruit bunch fibres - polypropylene composites: electron beam processing. [Proceedings Paper]
Abstract
The main objective of this study is to clarify and understand the interaction between hydrophilic fibres and hydrophobic thermoplastic through the flow behaviour of the composites. The electron beam EB radiation was used to induce radical formation in empty fruit bunch fibres EFB and polypropylene PP. Two types of reactive additives that have functional groups ofdiacrylate and triacrylate were used for preparing the composite pellets. The composites pellets were then subjected to injection moulding for preparation of test pieces for physical mechanical and rheology properties study. Haake Rheometer RS 150 was used to study the changes in viscosities of the composites at different shear rates. The PP melts shows pseudoplastic behaviour. The viscosity was constant at low shear rate and begun to decrease at higher shear rate of 5s·;. Upon irradiation the viscosity of PP decreased due to chain scission and the sudden drop ofviscosity at high shear rate was not significant. The presence of EFB fibre in the PP matrix was obviously interrupted the flow ability ofPP that caused viscosity to increase. Upon irradiation of EFBIPP the viscosity of the composites decreases. This indicated that no crosslinking occur between EFB and PP during melt mixing although PP and EFB active radicals were present in the composites. However by adding di-and trifunctional acrylates the viscosity of the irradiated EFBIPP increases significantly. This study showed that di-and tri-functional acrylates play important roles in providing the bridge for three-dimensional network to be formed between EFB and PP. In this paper rheology behaviour of electron beam irradiated EFBIPP composites were also compared with maleated PPIEFB composites.
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Abstract
The main objective of this study is to clarify and understand the interaction between hydrophilic fibres and hydrophobic thermoplastic through the flow behaviour of the composites. The electron beam EB radiation was used to induce radical formation in empty fruit bunch fibres EFB and polypropylene PP. Two types of reactive additives that have functional groups ofdiacrylate and triacrylate were used for preparing the composite pellets. The composites pellets were then subjected to injection moulding for preparation of test pieces for physical mechanical and rheology properties study. Haake Rheometer RS 150 was used to study the changes in viscosities of the composites at different shear rates. The PP melts shows pseudoplastic behaviour. The viscosity was constant at low shear rate and begun to decrease at higher shear rate of 5s·;. Upon irradiation the viscosity of PP decreased due to chain scission and the sudden drop ofviscosity at high shear rate was not significant. The presence of EFB fibre in the PP matrix was obviously interrupted the flow ability ofPP that caused viscosity to increase. Upon irradiation of EFBIPP the viscosity of the composites decreases. This indicated that no crosslinking occur between EFB and PP during melt mixing although PP and EFB active radicals were present in the composites. However by adding di-and trifunctional acrylates the viscosity of the irradiated EFBIPP increases significantly. This study showed that di-and tri-functional acrylates play important roles in providing the bridge for three-dimensional network to be formed between EFB and PP. In this paper rheology behaviour of electron beam irradiated EFBIPP composites were also compared with maleated PPIEFB composites.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB 299 P3 N277 2007 Call Number |
| AGROVOC Term: | Rheology |
| AGROVOC Term: | Oil palm |
| AGROVOC Term: | Hydrophilicity |
| AGROVOC Term: | Hydrophobicity |
| AGROVOC Term: | Radiation |
| AGROVOC Term: | Physical properties |
| AGROVOC Term: | Mechanical properties |
| AGROVOC Term: | Viscosity |
| AGROVOC Term: | Shears |
| AGROVOC Term: | Irradiation |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:14 |
| URI: | http://webagris.upm.edu.my/id/eprint/11876 |
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