The Role of Organoclay on In-situ Microfibril Formation of Epoxy in Poly(butylene terephtalate) Nanocomposites
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M. M. Salehi
Abstract
The main objective of the present work was to study the role of organoclay on the microfibrillation process of epoxy phase in Poly(butylene terephtalate), PBT, matrix both in presence and absence of epoxy curing agent. The PBT/epoxy blend samples with constant blend ratio (60/40) were prepared by melt mixing in a twin screw extruder. The elongational flow imposed by drawing the extrudate at the die exit permitted controlled generation of fibrile morphology of the dispersed epoxy phase, with a fiber diameter of 0.8 μm and an aspect ratio greater than 100. It was shown that when the curing agent was added into the extruder, its reactivity with epoxy at high temperature was high enough and selectively affected on the epoxy phase. The SEM results showed smaller epoxy droplet size for samples containing nanoclay compared to simple blends. This could be explained in terms of hindrance effect of nanoclay in reducing the coalescence as a dominating parameter due to presence of nanoclay in both phases. These results were supported by the melt linear viscoelastic results which showed enhanced low frequency viscosity and storage modulus for these samples. Addition of nanoclay was found to have little effect on extent of fibrillation epoxy droplet in stretched samples. The rheological results obtained for stretched samples showed very strong increase in low frequency solid body response whose extent was increase with increasing draw ratio. This mainly attributed to special 3-D network formed between microfibrils whose shape was stabilized by either presence of nanoclay or accelerated curing process of fibrillated epoxy. From SEM micrographs and linear viscoelastic measurements it can be deduced that curing process has small changes on the extent of fibrillation epoxy droplet in stretched samples. But it leads to improvement of interfacial interaction between two phases in the nanocomposites.
References
Baird, D. G., Wilkes, G. L., “Sandwich Injection Molding of Thermotropic Copolyesters and Filled Polyesters”, Polym. Eng. Sci., 23, 632–636 (1983) 10.1002/pen.760231108Suche in Google Scholar
Boyaud, M. F., Ait-Kadi, A., Bousmina, M., Michel, A., Cassagnau, Ph., “Organic Short Fibre/Thermoplastic Composites: Morphology and Thermorheological Analysis”, Polymer, 42, 6515–6526 (2001) 10.1016/S0032-3861(00)00878-8Suche in Google Scholar
Chaput, S., Carrot, C., Castro, M., Prochazka, F., “Co-continuity Interval in Immiscible Polymer Blends by Dynamic Mechanical Spectroscopy in the Molten and Solid State”, Rheol. Acta, 43, 417–426 (2004) 10.1007/s00397-004-0369-4Suche in Google Scholar
Chen, J., Chen, P., Wu, L., Zhang, J., He, J., “Fibrillation of Liquid Crystalline Polymer in Polysulfone Promoted by Increased System Elasticity via Adding nano-silica”, Polymer, 48, 4242–4251 (2007) 10.1016/j.polymer.2007.05.004Suche in Google Scholar
Cogswell, F. N., Griffin, B. P., Rose, J. B., U. S. Patent4433083 (1984)Suche in Google Scholar
Fenouillot, F., Camby, H. P., “Formation of a Fibrillar Morphology of Crosslinked Epoxy in a Polystyrene Continuous Phase by Reactive Extrusion”, Polym. Eng. Sci., 44, 625–637 (2004) 10.1002/pen.20057Suche in Google Scholar
Folkes, M. J., Hope, P. S.: Polymer Blends and Alloys, Chapman and Hall, London (1993) 10.1007/978-94-011-2162-0Suche in Google Scholar
Garcia, M., Eguiazabal, J. I., Nazabal, A., “Two Scale Reinforcement in Hybrid Composites Based on Poly(ether sulfone), Glass Fiber and Liquid Crystalline Polymer”, J. Compos. Sci. Technol., 63, 2163–2170 (2003) 10.1016/S0266-3538(03)00194-5Suche in Google Scholar
Kim, J. K., Song, J. H., “Rheological Properties and Fiber Orientations of Short Fiber-Reinforced Plastics”, J. Rheol., 41, 1061–1085 (1997) 10.1122/1.550825Suche in Google Scholar
Lee, M. W., Hu, X., Yue, C. Y., Li, L., Tam, K. C., “Effect of Fillers on the Structure and Mechanical Properties of LCP/PP/SiO2 In-situ Hybrid Nanocmposites”, Compos. Sci. Technol., 63, 339–346 (2003) 10.1016/S0266-3538(02)00222-1Suche in Google Scholar
Lee, M. W., Hu, X., Yue, C. Y., Li, L., Tam, K. C., Nakayama, K., “A Novel Approach to Fibrillation of LCP in a LCP/PP Blend”, J. Appl. Polym. Sci., 86, 2070–2078 (2002) 10.1002/app.11157Suche in Google Scholar
Pisharath, S., Wong, S. C., “Processability of LCP-Nylon-Glass Hybrid Composites”, Polym. Compos., 24, 109–118 (2003) 10.1002/pc.10011Suche in Google Scholar
Razaviaghjeh, M. K., Nazockdast, H., Assempour, H., “Determination of the Residence Time Distribution in Twin Screw Extruders via Free Radical Modification of PE”, Int. Polym. Proc., 4, 335–341 (2004)Suche in Google Scholar
Salehi, M. M., Nazockdast, H., Pircheraghi, Gh. R., “The Role of Organoclay on Microstructure Development and Rheological Properties of Poly(Butylene Terephtalate)/Epoxy/Organoclay Hybrid Systems”, J. Macromol. Sci. Part B, 51, 906–925, (2012) 10.1080/00222348.2011.610252Suche in Google Scholar
Seo, Y., Kim, H. J., Kim, Y., Rhee, H. W., “Effect of a Compatibilizer on the Structural Development of a Thermotropic Liquid Crystalline Polymer/Polystyrene Blend”, Polym. Eng. Sci., 42, 951–960 (2002) 10.1002/pen.11004Suche in Google Scholar
Shumsky, V. F., Getmanchuk, I. P., Lipatov, Y. S., “Effect of a Filler on the Rheological and Mechanical Properties of the Liquid Crystalline Polyester-Poly(methacrylate) Blends”, J. Appl. Polym. Sci., 76, 993–999 (2000) 10.1002/(SICI)1097-4628(20000516)76:7<993::AID-APP2>3.0.CO;2-9Suche in Google Scholar
Shumsky, V. F., Lipatov, Y. S., Kulichikhin, V. G., Getmanchuk, I. P., “Rheological Properties of Carbon Black Filled Blends of Liquid-crystalline Copolyester with Theroplastic Polysulfone”, Rheol. Acta., 32, 352–360 (1993) 10.1007/BF00435081Suche in Google Scholar
Tchoudakov, R., Narkis, M., Siegmann, A., “Electrical Conductivity of Polymer Blends Containing Liquid Crystalline Polymer and Carbon Black”, Polym. Eng. Sci., 44, 528–540 (2004) 10.1002/pen.20047Suche in Google Scholar
Tian, J., Yu, W., Zhou, Ch., “The Reparation and Rheology Characterization of Long Chain Branching Polypropylene”, Polymer, 47, 7962 (2006)10.1016/j.polymer.2006.09.042Suche in Google Scholar
Tjong, S. C., Meng, Y. Z., “Microstructural and Mechanical Characteristics of Compatibilized Polypropylene Hybrid Composites Containing Potassium Titanate Whisker and Liquid Crystalline Copolyester”, Polymer, 40, 7275–7283 (1999) 10.1016/S0032-3861(99)00090-7Suche in Google Scholar
Zhang, B., Ding, Y., Chen, P., Liu, Ch., Zhang, J., He, J., Hu, G. H., “Fibrillation of Thermotropic Liquid Crystalline Polymer Enhanced by Nano-clay in Nylon-6 Matrix”, Polymer, 46, 5385–5395 (2005) 10.1016/j.polymer.2005.03.093Suche in Google Scholar
Zhang, L., Tam, K. C., Gan, L. H., Yue, C. Y., Lam, Y. C., Hu, X., “Effect of Nanosilica Filler on the Rheological and Morphological Properties of Polypropylene/Liquid Crystalline Polymer Blend”, J. Appl. Polym. Sci., 87, 1484–1492 (2003) 10.1002/app.11513Suche in Google Scholar
© 2013, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Review Paper
- Recent Research Progress on Polymer Grafted Carbon Black and Its Novel Applications
- Regular Contributed Articles
- Fabrication of Electrospun Chitosan and Chitosan/Poly(ethylene oxide) Nanofiber Webs and Assessment of Their Antimicrobial Activity
- Effect of Nano-Particles on Flow and Recovery of Polymer Nano-Composites in the Melt State
- Differential Molding System for Micro Injection Molding of Thermoplastics
- The Effect of Shear Strain Amplitude and Loading Cycle on the Horizontal Characteristics of Fiber Reinforced Nanocomposite Elastomeric Seismic Isolators
- The Effect of Feeding Method and Compatibilizer on Nanoclay Partitioning and Microfibrillar Morphology Development in PP/PBT/Organoclay Blend Nanocomposite Fibers
- Effect of Hot Water and Water-carrying Agent on the Properties of Silane-water Crosslinked Linear Low Density Polyethylene
- Preparation and Characterization of Melamine Modified Urea-Formaldehyde Foam
- The Role of Organoclay on In-situ Microfibril Formation of Epoxy in Poly(butylene terephtalate) Nanocomposites
- Evaluation of Thermo-Mechanical and Wear Behavior of Short Carbon Fibre Vinyl-Ester Filled Homogenous and Their Functionally Graded Composites
- Factors Influencing the Warpage in In-Mold Decoration Injection Molded Composites
- Preparation and Characterization of CaCO3/High Density Polyethylene Composites with Various Shapes and Size of CaCO3
- Development of a Non-uniform Heating System for Micro Hot Embossing
- Processing of Thermally Stable Polymer Nanocomposites Reinforced Silicate Nanoparticles Based on N-trimellitylimido-L-phenyl alanine
- PPS-News
- PPS-News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Review Paper
- Recent Research Progress on Polymer Grafted Carbon Black and Its Novel Applications
- Regular Contributed Articles
- Fabrication of Electrospun Chitosan and Chitosan/Poly(ethylene oxide) Nanofiber Webs and Assessment of Their Antimicrobial Activity
- Effect of Nano-Particles on Flow and Recovery of Polymer Nano-Composites in the Melt State
- Differential Molding System for Micro Injection Molding of Thermoplastics
- The Effect of Shear Strain Amplitude and Loading Cycle on the Horizontal Characteristics of Fiber Reinforced Nanocomposite Elastomeric Seismic Isolators
- The Effect of Feeding Method and Compatibilizer on Nanoclay Partitioning and Microfibrillar Morphology Development in PP/PBT/Organoclay Blend Nanocomposite Fibers
- Effect of Hot Water and Water-carrying Agent on the Properties of Silane-water Crosslinked Linear Low Density Polyethylene
- Preparation and Characterization of Melamine Modified Urea-Formaldehyde Foam
- The Role of Organoclay on In-situ Microfibril Formation of Epoxy in Poly(butylene terephtalate) Nanocomposites
- Evaluation of Thermo-Mechanical and Wear Behavior of Short Carbon Fibre Vinyl-Ester Filled Homogenous and Their Functionally Graded Composites
- Factors Influencing the Warpage in In-Mold Decoration Injection Molded Composites
- Preparation and Characterization of CaCO3/High Density Polyethylene Composites with Various Shapes and Size of CaCO3
- Development of a Non-uniform Heating System for Micro Hot Embossing
- Processing of Thermally Stable Polymer Nanocomposites Reinforced Silicate Nanoparticles Based on N-trimellitylimido-L-phenyl alanine
- PPS-News
- PPS-News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts
