In this research, an attempt was made to improve compatibility in a polymer blend composed of incompatible constituents, namely, recycled polystyrene (rPS) and polystyrene-co-acrylonitrile (SAN), through the addition of a compatibilizer. The compatibilizing agent, styrene - ethylenebutadiene - styrene block copolymer (SEBS), was added to the polymer blend in ratios of 5 and 10 wt%. For this purpose, blends of rPS and SAN at different r a tios, without and with varying concentrations of compatibilizer, were pre pared by melt blending using a co-rotating twin-screwextruder. Mechanical properties including tensile and impact strength, rheological properties (RPA), thermal behaviour (DSC) and morphological characteristics (SEM) were evaluated. According to the results obtained by complex viscosity, the blends behave as a pseudoplastic fluid. The results showed that the addition of SEBS increased the Izod impact strength and the elongation at break and decreased the tensile strength and tensile modulus. rPS/SAN blend modified with SEBS had better mechanical properties than the rPS/SAN alloy. SEM photographs revealed that the SEBS was not only distributed in the SAN phase but also distributed in rPS phase in rPS/SAN/SEBS blend. Furthermore, DSC analysis for blends of rPS/SAN gave a good indication of the improvement on miscibility for most compositions. SEM micrographs of tensile fracture surfaces indicated that the formation of the co-continuous phase and the improvement of interface adhesion are the most important reasons for the excellent tensile properties of the rPS/SAN/SEBS blends. Within the range of analysed compositions, the morphologies investigated by SEM are typical of immiscible blends.
Siakeng, R., Jawaid, M., Ariffin, H., Sapuan, S.M., Asim, M. and Saba, N. (2018) Natural Fiber Reinforced Polylactic Acid Composites: A Review. Journal of Polymer Composites, 42, 446-463. https://doi.org/10.1002/pc.24747
Ross, S. and Evans, D. (2003) The Environmental Effect of Reusing and Recycling a Plastic-Based Packaging System. Journal of Cleaner Production, 11, 561-571. https://doi.org/10.1016/S0959-6526(02)00089-6
Kaminsky, W., Predel, M. and Sadiki, A. (2004) Feedstock Recycling of Polymers by Pyrolysis in a Fluidised Bed. Polymer Degradation & Stability, 85, 1045-1050. https://doi.org/10.1016/j.polymdegradstab.2003.05.002
Luna, C.B.B., Araújo, E.M., Siqueira, D.D., Morais, D.D. de S., Filho, E.A. dos S. and Fook, M.V. L. (2020) Incorporation of a Recycled Rubber Compound from the Shoe Industry in Polystyrene: Effect of SBS Compatibilizer Content. Journal of Elastomers & Plastics, 5, 3-28. https://doi.org/10.1177/0095244318819213
Jonna, S. and Lyons, J. (2005) Processing and Properties of Cryogenically Milled Post-Consumer Mixed Plastic Waste. Polymer Testing, 24, 428-434. https://doi.org/10.1016/j.polymertesting.2005.01.009
Dintcheva, N.T., Mantia, F.P.L., Trotta, F., Luda, M.P., Camino, G., Paci, M., Maio, L.D. and Acierno, D. (2001) Effects of Filler Type and Processing Apparatus on the Properties of the Recycled “Light Fraction” from Municipal Post-Consumer Plastics. Polymers for Advanced Technologies, 12, 552-560. https://doi.org/10.1002/pat.147
Hayeemasae, N., Song, L.W. and Ismail, H. (2019) Sustainable Use of Eggshell Powder in the Composite Based on Recycled Polystyrene and Virgin Polystyrene Mixture. International Journal of Polymer Analysis and Characterization, 24, 266-275. https://doi.org/10.1080/1023666X.2019.1567089
Khan, Z. and Baloch, M.K. (2014) Effect of Solvent on the Miscibility of Polystyrene/Poly(Styrene-Co-Acrylonitrile) Blends at Different Temperatures. Journal of Macromolecular Science, Part B, 53, 1027-1049. https://doi.org/10.1080/00222348.2013.879786
Marwat, Z.K. and Baloch, M.K. (2015) Investigating Miscibility of Polymers and Its Impact on the Morphology, Thermal, and Mechanical Properties of Polymer Blends. International Journal of Thermophysics, 36, 2755-2768. https://doi.org/10.1007/s10765-015-1961-9
Du, B., Handge, U.A., Majeed, S. and Abetz, V. (2012) Localization of Functionalized MWCNT in SAN/PPE Blends and Their Influence on Rheological Properties. Polymer, 53, 5491-5501. https://doi.org/10.1016/j.polymer.2012.09.047
Stadler, F.J., Piel, C., Kaminsky, W. and Münstedt, H. (2006) Rheological Characterization of Long-Chain Branched Polyethylenes and Comparison with Classical Analytical Methods. Macromolecular Symposia, 236, 209-218. https://doi.org/10.1002/masy.200690057
Potschke, P and Paul, D.R. (2003) Formation of Co-Continuous Structures in Melt Mixed Immiscible Polymer Blends. Journal of Macromolecular Science, Part C, 43, 87-141. https://doi.org/10.1081/MC-120018022
Li, T., Topolkaraev, V.A., Hiltner, A., Baer, E., Ji, X.Z. and Quirk, R.P. (1995) Block Copolymers as Compatibilizers for Blends of Linear Low Density Polyethylene and Polystyrene. Journal of Polymer Science Part B: Polymer Physics, 33, 667-683. https://doi.org/10.1002/polb.1995.090330416
Fekete, E., Földes, E., Damsits, F. and Pukánszky, B. (2000) Interaction-Structure-Property Relationships in Amorphous Polymer Blends. Polymer Bulletin, 44, 363-370. https://doi.org/10.1007/s002890070085
Wu, J., Guo, B., Chan, C.-M., Li, J. and Tang, H.-S. (2001) Synergistic Toughening Effect of SBS and HDPE on the Fracture of the PS/HDPE/SBS Blends. Polymer, 42, 8857-8865. https://doi.org/10.1016/S0032-3861(01)00443-8
Aranburu, N. and Eguiazábal, J.I. (2015) Improved Mechanical Properties of Compatibilized Polypropylene/Polyamide-12 Blends. International Journal of Polymer Science, 2015, Article ID: e742540. https://doi.org/10.1155/2015/742540
Jiang, G., Wu, H. and Guo, S. (2010) Reinforcement of Adhesion and Development of Morphology at Polymer-Polymer Interface via Reactive Compatibilization: A Review. Polymer Engineering & Science, 50, 2273-2286. https://doi.org/10.1002/pen.21686
Pötschke, P. and Paul, D.R. (2003) Formation of Co-Continuous Structures in Melt-Mixed Immiscible Polymer Blends. Journal of Macromolecular Science, Part C, 43, 87-141. https://doi.org/10.1081/MC-120018022
Utracki, L.A. (2002) Compatibilization of Polymer Blends. The Canadian Journal of Chemical Engineering, 80, 1008-1016. https://doi.org/10.1002/cjce.5450800601
Nam, G.J., Kim, K.Y. and Lee, J.W. (2005) The Effect of SEBS on Interfacial Tension and Rheological Properties of LDPE/PS Blend. Journal of Applied Polymer Science, 96, 905-911. https://doi.org/10.1002/app.21536
Tjong, S.C., Xu, S.A. and Li, R.K.Y. (2000) Work of Fracture of Polystyrene/High Density Polyethylene Blends Compatibilized by Triblock Copolymer. Journal of Applied Polymer Science, 77, 2074-2081.
Yang, Q., Mao, Y., Li, G., Huang, Y., Tang, P. and Lei, C. (2004) Study on the UCST Behavior of Polystyrene/Poly(Styrene-Co-Acrylonitrile) Blend. Materials Letters, 58, 3939-3944. https://doi.org/10.1016/j.matlet.2004.08.024
Scaffaro, R., La Mantia, F.P., Canfora, L., Polacco, G., Filippi, S. and Magagnini, P. (2003) Reactive Compatibilization of PA6/LDPE Blends with an Ethylene-Acrylic Acid Copolymer and a Low Molar Mass Bis-Oxazoline. Polymer, 44, 6951-6957. https://doi.org/10.1016/j.polymer.2003.06.001
Joseph, S., Laupre, F., Negrell, C. and Thomas, S. (2005) Compatibilising Action of Random and Triblock Copolymers of Poly(Styrene-Butadiene) in Polystyrene/Polybutadiene Blends: A Study by Electron Microscopy, Solid State NMR Spectroscopy and Mechanical Measurements. Polymer, 46, 9385-9395. https://doi.org/10.1016/j.polymer.2005.07.053
Feng, W. and Isayev, A.I. (2004) In Situ Compatibilization of PP/EPDM Blends during Ultrasound Aided Extrusion. Polymer, 45, 1207-1216. https://doi.org/10.1016/j.polymer.2003.12.033
Zhang, Q., Yang, H. and Fu, Q. (2004) Kinetics-Controlled Compatibilization of Immiscible Polypropylene/Polystyrene Blends Using Nano-SiO2 Particles. Polymer, 45, 1913-1922. https://doi.org/10.1016/j.polymer.2004.01.037
Kong, Y., Li, Y., Hu, G., Cao, N., Ling, Y., Pan, D., Shao, Q. and Guo, Z. (2018) Effects of polystyrene-b-poly(ethylene/propylene)-b-polystyrene Compatibilizer on the Recycled Polypropylene and Recycled High-Impact Polystyrene Blends. Polymers for Advanced Technologies, 29, 2344-2351. https://doi.org/10.1002/pat.4346
Fu, X., Ding, M., Tang, C., Li, B., Zhao, Z., Chen, D.-Q., Zhang, Q., Fu, Q., Long, H. and Tan, T. (2008) Toughening of Recycled Polystyrene Used for TV Backset. Journal of Applied Polymer Science, 109, 3725-3732. https://doi.org/10.1002/app.28593
Cavanaugh, T.J., Buttle, K., Turner, J.N. and Bruce Nauman, E. (1998) The Study of Various Styrene-Butadiene Copolymers as Compatibilisers in Bulk Blends of Polystyrene/Polybutadiene. Polymer, 39, 4191-4197. https://doi.org/10.1016/S0032-3861(98)00058-5
Hachiya, H., Takayama, S. and Takeda, K. (1998) Properties of Immiscible Polymer Alloys without Compatibilizer. Journal of Applied Polymer Science, 70, 2515-2520. https://doi.org/10.1002/(SICI)1097-4628(19981219)70:12%3C2515::AID-APP25%3E3.0.CO;2-U
do Nascimento, W.A., Agrawal, P. and Mélo, T.J.A. (2019) Effect of Copolymers Containing Glycidyl Methacrylate Functional Groups on the Rheological, Mechanical, and Morphological Properties of Poly(Ethylene Terephthalate). Polymer Engineering & Science, 59, 683-693. https://doi.org/10.1002/pen.24982
Wang, J., Li, Y., Song, J., He, M., Song, J. and Xia, K. (2015) Recycling of Acrylonitrile-Butadiene-Styrene (ABS) Copolymers from Waste Electrical and Electronic Equipment (WEEE), through Using an Epoxy-Based Chain Extender. Polymer Degradation and Stability, 112, 167-174. https://doi.org/10.1016/j.polymdegradstab.2014.12.025
da Costa, H.M., Ramos, V.D., da Silva, W.S. and Sirqueira, A.S. (2010) Analysis and Optimization of Polypropylene (PP)/Ethylene-Propylene-Diene Monomer (EPDM)/Scrap Rubber Tire (SRT) Mixtures Using RSM Methodology. Polymer Testing, 29, 572-578. https://doi.org/10.1016/j.polymertesting.2010.04.003
Graebling, D., Muller, R. and Palierne, J.F. (2002) Linear Viscoelastic Behavior of Some Incompatible Polymer Blends in the Melt. Interpretation of Data with a Model of Emulsion of Viscoelastic Liquids. Macromolecules, 26, 320-329.
Bousmina, M. and Muller, R. (1993) Linear Viscoelasticity in the Melt of Impact PMMA. Influence of Concentration and Aggregation of Dispersed Rubber Particles. Journal of Rheology, 37, 663-679. https://doi.org/10.1122/1.550389
Pakula, T., Vlassopoulos, D., Fytas, G. and Roovers, J. (1998) Structure and Dynamics of Melts of Multiarm Polymer Stars. Macromolecules, 31, 8931-8940. https://doi.org/10.1021/ma981043r
Sen, K. and K, M.B. Studies on Indian silk. I. (2004) Macrocharacterization and Analysis of Amino Acid Composition. Journal of Applied Polymer Science, 92, 1080-1097. https://doi.org/10.1002/app.13609
Tol, R.T., Groeninckx, G., Vinckier, I., Moldenaers, P. and Mewis, J. (2004) Phase Morphology and Stability of Co-Continuous (PPE/PS)/PA6 and PS/PA6 Blends: Effect of Rheology and Reactive Compatibilization. Polymer, 45, 2587-2601. https://doi.org/10.1016/j.polymer.2003.12.072
Ajji, A., Choplin, L. and Prud’homme, R.E. (1988) Rheology and Phase Separation in Polystyrene/Poly (Vinyl Methyl Ether) Blends. Journal of Polymer Science Part B: Polymer Physics, 26, 2279-2289. https://doi.org/10.1002/polb.1988.090261108
Chopra, D., Kontopoulou, M., Vlassopoulos, D. and Hatzikiriakos, S.G. (2002) Effect of Maleic Anhydride Content on the Rheology and Phase Behavior of Poly(Styrene-Co -Maleic Anhydride)/Poly(Methyl Methacrylate) Blends. Rheol. Acta, 41, 10-24. https://doi.org/10.1007/s003970200001
Ardakani, F., Jahani, Y. and Morshedian, J. (2012) Dynamic Viscoelastic Behavior of Polypropylene/Polybutene-1 Blends and Its Correlation with Morphology. Journal of Applied Polymer Science, 125, 640-648. https://doi.org/10.1002/app.36324
Lima, J.C.C., Araújo, J.P., Agrawa, L.P. and Mélo, T.J.A. (2015) Efeito do teor do copolímero SEBS no comportament reológico da blenda PLA/SEBS. Revista Eletrônica de Materiais e Processos, 11, 10-17.
Hwang, I.J., Lee, M.H. and Kim, B.K. (1998) Preparation and Properties of SAN/EPDM/CPE Ternary Blends. European Polymer Journal, 34, 671-675. https://doi.org/10.1016/S0014-3057(97)00199-7
de Mélo, T.J.A., Carvalho, L.H., Calumby, R.B., Brito, K.G.Q., D’Almeida, J.R.M. and Spieth, E. (2000) Propriedades mecanicas e morfologia de uma blenda polimérica de PP/HIPS compatibilizada com SEBS. Polímeros, 10, 82-89. https://doi.org/10.1590/S0104-14282000000200010
Incarnato, L., Scarfato, P. and Acierno, D. (1999) Rheological and Mechanical Properties of Recycled Polypropylene. Polymer Engineering & Science, 39, 749-755. https://doi.org/10.1002/pen.11463
Bedjaoui, K., Krache, R., Marcos-Fernández, A. and Guessoum, M. (2019) The Effect of Compatibilizer SEBS on the Mechanical, Morphological and Thermal Properties of the Polystyrene/Poly (Styrene-Co-Acrylonitrile) Copolymer Blends. Materials Research Express, 6, Article ID: 105334. https://doi.org/10.1088/2053-1591/ab38e7
Tostar, S., Stenvall, E., Foreman, M.R.S.J. and Boldizar, A. (2016) The Influence of Compatibilizer Addition and Gamma Irradiation on Mechanical and Rheological Properties of a Recycled WEEE Plastics Blend. Recycling, 1, 101-110. https://doi.org/10.3390/recycling1010101
Díaz, M.F., Barbosa, S.E. and Capiati, N.J. (2005) Improvement of Mechanical Properties for PP/PS Blends by in Situ Compatibilization. Polymer, 46, 6096-6101. https://doi.org/10.1016/j.polymer.2005.04.098
Lourenço, E. and Felisberti, M.I. (2006) Photochemical Aging of in Situ Polymerized Blends of Polystyrene and Poly[acrylonitrile-g-(ethylene-co-propylene-co-diene)-g-styrene] (AES). Polymer Degradation and Stability, 91, 2968-2978. https://doi.org/10.1016/j.polymdegradstab.2006.08.013
Araújo, J.P., Agrawal, P. and Mélo, T.J.A. (2015) Blendas PLA/PEgAA: Avaliação da reatividade entre os polímeros e da concentração de PEgAA nas propriedades e na morfologia. Revista Eletrônica de Materiais e Processos, 10, 118-127.
Van der Donck, T., Wübbenhorst, M. and Moldenaers, P.P. (2017) Tuning the Phase Separated Morphology and Resulting Electrical Conductivity of Carbon Nanotube-Filled PAMSAN/PMMA Blends by Compatibilization with a Random or Block Copolymer. Polymer,108, 483-492. https://doi.org/10.1016/j.polymer.2016.12.015