Abstract
Polylactide (PLA) films blended with poly(butylene adipate-co-terephthalate) (PBAT) were hot melted using a twin screw extruder with the addition of triethyl citrate (TEC) as a plasticizer and toluene diisocyanate (TDI) as a compatibilizer. The synergistic effects of the two additives on the mechanical, thermal, and morphological properties of the PLA/PBAT blend films were investigated. The influence of TEC content on the plasticized PLA films and the effect of TDI’s presence on the PLA/PBAT blend films were also studied by comparing them with neat PLA. The results showed a pronounced increase in elongation at break of the plasticized PLA films with increasing TEC levels, but a slight reduction in thermal stability. Also, the addition of TEC and TDI to the blend system not only synergistically enhanced the tensile properties and tensile-impact strength of the PLA/PBAT blends, but also affected their crystallinity and cold crystallization rate, a result of the improvement of interfacial interaction between PLA and PBAT, including the enhancement of their chain mobility. The synergy of the plasticization and compatibilization processes led to the improvement of tensile properties, tensile-impact strength, and compatibility of the blends, accelerating cold crystallization without affecting crystallization.
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References
Faruk, O. Biocomposites reinforced with natural fibers: 2000–2010. Prog. Polym. Sci. 2012, 37, 1552–1596.
Nyambo, C.; Mohanty, A. K.; Misra, M. Patolylactide-based renewable green composites from agricultural residues and their hybrids. Biomacromolecules 2010, 11, 1654–1660.
Zhou, K. Y.; Li, J. B.; Wang, H. X.; Ren, J. Eatffect of starshaped chain architectures on the polylactide stereocomplex crystallization behaviors. Chinese J. Polym. Sci. 2017, 35, 974–991.
Shi, X.; Zhang, G.; Phuong, T. V.; Lazzeri, A. Synergistic effects of nucleating agents and plasticizers on the crystallization behavior of poly(lactic acid). Molecules 2015, 20, 1579–1593.
Wang, Y. P.; Wei, X.; Duan, J.; Yang, J. H.; Zhang, N.; Huang, T.; Wang, Y. Greatly enhanced hydrolytic degradation ability of poly(L-lactide) achieved by adding poly(ethylene glycol). Chinese J. Polym. Sci. 2017, 35, 386–399.
Mohapatra, A. K.; Mohanty, S.; Nayak, S. K. Study of thermomechanical and morphological behaviour of biodegradable PLA/PBAT/layered silicate blend nanocomposites. J. Polym. Environ. 2014, 22, 398–408.
Ren, J.; Fu, H.; Ren, T.; Yuan, W. Preparation, characterization and properties of binary and ternary blends with thermoplastic starch, poly(lactic acid) and poly(butylene adipate-coterephthalate). Carbohyd. Polym. 2009, 77, 576–582.
Lee, D. Y.; Lee, S. H.; Cho, M. S.; Namc, J. D.; Lee, Y. Facile fabrication of highly flexible poly(lactic acid) film using alternate multilayers of poly(butylene adipate)-co-terephthalate. Polym. Int. 2015, 64, 581–585.
Zhang, Y.; Deng, B. Y.; Liu, Q. S. Rheology and crystallization of PLA containing PLA-grafted nanosilica. Plast. Rubber Compos. 2014, 43, 309–314.
Li, Y.; Shimizu, H. Toughening of polylactide by melt blending with a biodegradable poly(ether)urethane elastomer. Macromol. Biosci. 2007, 7, 921–928.
Ouchi, T.; Ohya, Y. Design of lactide copolymers as biomaterials. J. Polym. Sci., Part A: Polym. Chem. 2004, 42, 453–462.
Nouvel, C.; Dubois, P.; Dellacherie, E.; Six, J. L. Controlled synthesis of amphiphilic biodegradable polylactide-grafted dextran copolymers. J. Polym. Sci., Part A: Polym. Chem. 2004, 42, 2577–2588.
Bai, H. W.; Xiu, H.; Gao, J.; Deng, H.; Zhang, Q.; Yang, M. Tailoring impact toughness of poly(L-lactide)/poly(ε-caprolactone) (PLLA/PCL) blends by controlling crystallization of PLLA matrix. ACS Appl. Mater. Interfaces 2012, 4, 897–905.
Yuan, Y.; Hu, Z.; Fu, X.; Jiang, L.; Xiao, Y.; Hu, K.; Yan, P.; Lei, J. Poly(lactic acid) plasticized by biodegradable glyceryl lactate. J. Appl. Polym. Sci. 2016, 133, 43460.
Yu, R. L.; Zhang, L. S.; Feng, Y. H.; Zhang, R. Y.; Zhu, J. Improvement in toughness of polylactide by melt blending with bio-based poly(ester)urethane. Chinese J. Polym. Sci. 2014, 32, 1099–1110.
Labrecque, L. V.; Kumar, R. A.; Dave, V.; Gross, R. A.; Mc-Carthy, S. P. Citrate esters as plasticizers for poly(lactic acid). J. Appl. Polym. Sci. 1997, 66, 1507–1513.
Pillin, I.; Montrelay, N.; Grohens, Y. Thermo-mechanical characterization of plasticized PLA: Is the miscibility the only significant factor. Polymer 2006, 47, 4676–4682.
Kim, K. S.; Chin, I. J.; Yoon, J. S.; Choi, H. J.; Lee, D. C.; Lee, K. H. Crystallization behavior and mechanical properties of poly(ethylene oxide)/poly(L-lactide)/poly(vinyl acetate) blends. J. Appl. Polym. Sci. 2001, 82, 3618–3626.
Shibata, M.; Inoue, Y.; Miyoshi, M. Mechanical properties, morphology, and crystallization behavior of blends of poly(Llactide) with poly(butylenes succinate-co-L-lactate) and poly(butylene succinate). Polymer 2006, 47, 3557–3564.
Fortunati, E.; Puglia, D.; Iannoni, A.; Terenzi, A.; Kenny, J. M.; Torre, L. Processing conditions, thermal and mechanical responses of stretchable poly(lactic acid)/poly(butylene succinate) films. Materials 2017, 809, 1–16.
Zhang, L. L.; Xiong, C. D.; Deng, X. M. Biodegradable polyester blends for biomedical application. J. Appl. Polym. Sci. 1995, 56, 103–112.
Wang, L.; Ma, W.; Gross, R. A.; McCarthy, S. P. Reactive compatibilization of biodegradable blends of poly(lactic acid) and poly(ε-caprolactone). Polym. Degrad. Stab. 1998, 59, 161–168.
Jiang, L.; Wolcott, M. P.; Zhang, J. W. Study of biodegradable polyactide/poly(butylene adipate-co-terephthalate) blends. Biomacromolecules 2006, 7, 199–207.
Zhang, N. W.; Wang, Q. F.; Ren, J.; Wang, L. Preparation and properties of biodegradable poly(lactic acid)/poly(butylene adipate-co-terephthalate) blend with glycidyl methacrylate as reactive processing agent. J. Mater. Sci. 2009, 44, 250–256.
Liu, B.; Bhaladhare, S.; Zhan, P.; Jiang, L.; Zhang, J. Morphology and properties of thermoplastic sugar beet pulp and poly(butylene adipate-co-terepthalate) blends. Ind. Eng. Chem. Res. 2011, 50, 13859–13865.
Wang, Y.; Chiao, S. M.; Hung, T. F.; Yang, S. Y. Improvement in toughness and heat resistance of poly(lactic acid)/polycarbonate blend through twin-screw blending: Influence of compatibilizer type. J. Appl. Polym. Sci. 2012, 125, E402–E412.
Xiao, H. W.; Li, P.; Ren, X.; Jiang, T.; Taut, Y. J. Isothermal crystallization kinetics and crystal structure of poly(lactic acid): Effect of triphenyl phosphate and talc. J. Appl. Polym. Sci. 2010, 118, 3558–3569.
Phetwarotai, W.; Aht-Ong, D. Characterization and properties of nucleated polylactide, poly(butylenes adipate-co-terephthalate), and thermoplastic starch ternary blend films: Effects of compatibilizer and starch. Adv. Mater. Res. 2013, 747, 673–677.
Jang, W. Y.; Shin, B. Y.; Lee, T. J.; Narayan, R. J. Thermal properties and morphology of biodegradation PLA/starch compatibilized blends. Ind. Eng. Chem. 2007, 13, 457–464.
Zhang, J. F.; Sun, X. Mechanical and thermal properties of poly(lactic acid)/starch blends with dioctyl maleate. J. Appl. Polym. Sci. 2004, 94, 1697–1704.
Wang, H.; Sun, X.; Seib, P. Effects of starch moisture on properties of wheat starch/poly(lactic acid) blend containing methylenediphenyl diisocyanate. J. Polym. Environ. 2002, 10, 133–138.
Phetwarotai, W.; Potiyaraj, P.; Aht-Ong, D. Properties of compatibilized polylactide blend films with gelatinized corn and tapioca starches. J. Appl. Polym. Sci. 2010, 116, 2305–2311.
Carlson, D.; Nie, L.; Narayan, R.; Dubois, P. Maleation of polylactide (PLA) by reactive extrusion. J. Appl. Polym. Sci. 1999, 72, 477–485.
Li, H.; Huneault, M. A. Effect of chain extension on the properties of PLA/TPS blends. J. Appl. Polym. Sci. 2011, 122, 134–141.
Al-Itry, R.; Lamnawar, K.; Maazouz, A. Improvement of thermal stability, rheological and mechanical properties of PLA, PBAT and their blends by reactive extrusion with functionalized epoxy. Polym. Degrad. Stab. 2012, 97, 1898–1914.
Mohapatra, A. K.; Mohanty, S.; Nayak, S. K. Study of thermomechanical and morphological behavior of biodegradable PLA/PBAT/layered silicate blend nanocomposites. J. Polym. Environ. 2014, 22, 398–408.
Marcilla, A. and Beltran, M., in Handbook of Plasticizers, 1st ed., by Wypych, G., ChemTec Publishing, Toronto, NY, 2004, p.115
Phetwarotai, W.; Tanrattanakul, V.; Phusunti, N. Synergistic effect of nucleation and compatibilization on the polylactide and poly(butylene adipate-co-terephthalate) blend films. Chinese J. Polym. Sci. 2016, 34, 1129–1140.
Phetwarotai, W.; Tanrattanakul, V.; Phusunti, N. Mechanical characteristics and thermal behaviours of polylactide blend films: Influence of nucleating agent and poly(butylenes adipateco-terephthalate). Plast. Rubber Compos. 2016, 45, 333–345.
Zhang, J.; Tashiro, K.; Tsuji, H.; Domb, A. J. Disorder-to-order phase transition and multiple melting behavior of poly(Llactide) investigated by simultaneous measurements of WAXD and DSC. Macromolecules 2008, 41, 1352–1357.
Battegazzore, D.; Bocchini, S.; Frache, A. Crystallization kinetics of poly(lactic acid)-talc composites. Express Polym. Lett. 2011, 5, 849–858.
Bueche, F., in Physical Properties of Polymers, 1st ed., Interscience Publishers, NY, 1979, p.102
Acknowledgments
The work was financially supported by Development and Promotion of Science and Technology Talents (DPST) (No. 013/2559). Thanks also to Mr. Thomas Coyne for assistance with the English text.
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Phetwarotai, W., Phusunti, N. & Aht-Ong, D. Preparation and Characteristics of Poly(butylene adipate-co-terephthalate)/Polylactide Blend Films via Synergistic Efficiency of Plasticization and Compatibilization. Chin J Polym Sci 37, 68–78 (2019). https://doi.org/10.1007/s10118-019-2174-7
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DOI: https://doi.org/10.1007/s10118-019-2174-7