| Autor: |
Monem, N. M. Abdel, Ali, Z. I., Said, Hossam M., Youssef, H. A., Saleh, H. H. |
| Předmět: |
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| Zdroj: |
Polymer-Plastics Technology & Engineering; 2005, Vol. 44 Issue 5, p1025-1047, 23p, 1 Chart, 6 Graphs |
| Abstrakt: |
Blending is an effective method for improving the physical and chemical properties of homopolymers. However, the problem of phase separation often in some polymer blends occurs due to incompatibility of homopolymer, which impairs the expected physico-chemical properties of blends. In this study, isotactic polypropylene (PP) was blended with low density polyethylene (LDPE) in the presence of various ratios of polyfunctional monomer (PFM), namely, trimethylol propane trimethacrylate (TMPTMA) as a cross-linking and/or compatibilizing agents. The electron beam irradiation of the investigated LDPE/PP blends was carried out at different irradiation doses up to 50 kGy to improve the compatibility of LDPE/PP blends. The dye affinity for disperse and basic dyes of LDPE, PP, and LDPE/PP blends was investigated in terms of color strength and visible absorbance intensities. In addition, the microstructures of the investigated samples have been studied, and it is considered as an indication of the compatibility of LDPE/PP blend. The results show that the unmodified and PFM modified LDPE samples show the highest values of both color strength and visible absorbance intensities compared with unmodified and PFM modified PP samples. The intensities of these values in the LDPE/PP blends also decrease as the PP content increases in the blend. In addition, the increase of EB irradiation dose and PFM ratios leads to an increase in the values of color strength and visible absorbance intensities. Moreover, the affinity of all investigated samples toward disperse dye is being more pronounced than the basic dye. The interfacial adhesion of LDPE/PP blend could be enhanced by adding cross-linking agent (TMPTMA) and EB irradiation process with different irradiation doses. The obtained data for the microstructures of all the investigated samples support that the EB irradiation beside the incorporation of PFM into the homopolymer matrix remarkably improve the compatibility of the polymer blend. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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