Abstract
The introduction of β-nucleating agent into isotactic polypropylene (iPP) is the most effective method to prepare β-iPP. In this paper, iPP nucleated with a novel highly efficient supported β-nucleating agent (NA100), calcium pimelate (CaHA) supported on the surface of nano-CaCO3, was prepared and its nonisothermal crystallization kinetic, melting characteristic, and crystallization activation energy are investigated and compared with those of pure iPP, nano-CaCO3 filled iPP, and β-nucleating agent CaHA nucleated iPP. The results indicate that addition of nano-CaCO3 increases the crystallization temperature of iPP and has no influence on the crystal form of iPP. iPP and nano-CaCO3 filled iPP mainly crystallize in the form of α-crystal. Although NA100 and CaHA induce iPP to mainly form β-crystal, NA100 nucleated iPP shows higher crystallization temperature, melting temperature, and β-phase content than that nucleated with CaHA without supports. Nonisothermal crystallization kinetic is well described by the equations of Avrami and Mo, and the crystallization activation energy was calculated from Kissinger’s method. It was found that the decreased crystallization activation energy is favorable to increase the crystallization rate and the content of β-crystal. Although the content of CaHA in 5 wt% NA100 nucleated iPP was less than that in 0.1 wt% CaHA nucleated iPP, the former formed more β-iPP than the latter, indicating that the β-nucleating agent CaHA supported on the surface of nano-CaCO3 exhibits higher efficiency for preparation of β-iPP than pure CaHA powder.
Similar content being viewed by others
References
Dmytro B, Pierre P, Klaas R, Edwin B, Giovanni CA, Wim H de J. Crystallization under shear in isotactic polypropylene containing nucleators. Polymer. 2008;49:3076–83.
Zhang YF. Isothermal crystallization behaviors of isotactic polypropylene nucleated with the third generation sorbitol derivative nucleating agents. J Macromol Sci Phys. 2008;47:891–9.
Bai HW, Wang Y, Song B, Han L. Synergistic toughening effects of nucleating agent and ethylene-octene copolymer on polypropylene. J Appl Polym Sci. 2008;108:3270–80.
Wang JB, Dou Q. Non-isothermal crystallization kinetics and morphology of isotactic polypropylene (iPP) nucleated with rosin-based nucleating agents. J Macromol Sci Phys. 2007;46:987–1001.
Mai KC, Wang KF, Zeng HM. Multiple melting behavior of nucleated polypropylene. J Appl Polym Sci. 2003;88:1608–11.
Wang KF, Mai KC, Zeng HM. Study on the thermal stability of heterogeneous nucleation effect of polypropylene nucleated by different nucleating agents. J Appl Polym Sci. 2002;83:1643–50.
Wang KF, Mai KC, Zeng HM. Isothermal crystallization behavior and melting characteristics of injection sample of nucleated polypropylene. J Appl Polym Sci. 2000;78:2547–53.
Varga J. β-modification of isotactic polypropylene: preparation, structure, processing, properties, and application. J Macromol Sci Phys. 2002;41:1121–71.
Grein C. Toughness of neat, rubber modified and filled β-nucleated polypropylene: from fundamentals to applications. Adv Polym Sci. 2005;188:43–104.
Garbarczyk J, Paukzta D. Influence of additives on the structure and properties of polymer. Polymer. 1981;22:562–4.
Shi GY, Zhang JY, Jin HS. German Patent DE 3610644; 10 Feb 1986
Shi GY, Zhang XD, Qiu Z. Crystallization kinetics of β-phase poly(propylene). Makromol Chem. 1992;193:583–91.
Varga J, Schulek-Toth F, Pati M. Hungarian Patent 209132; 29 April 1992
Feng JC, Chen MC, Huang ZT. Lanthanum stearate composite act as β-modification nucleating agent of isotatic polypropylene. Chem J Chin Univ. 2001;22:154–6.
Marco C, Gomez MA, Ellis G, Arribas JM. Activity of a β-nucleating agent for isotactic polypropylene and its influence on polymorphic transitions. J Appl Polym Sci. 2002;86:531–9.
Kotek J, Raab M, Baldrian J, Grellmann WJ. The effect of specific β-nucleation on morphology and mechanical behavior of isotactic polypropylene. J Appl Polym Sci. 2002;85:1174–84.
Menyhárd A, Varga J, Molnár G. Comparison of different β-nucleators for isotactic polypropylene, characterisation by DSC and temperature- modulated DSC (TMDSC) measurements. J Therm Anal Calorim. 2006;83:625–30.
Varga J, Mudra I, Ehrenstein GW. Highly active thermally stable β-nucleating agents for isotactic polypropylene. J Appl Polym Sci. 1999;74:2357–68.
Dou Q. Effect of the composition ratio of pimelic acid/calcium stearate bicomponent nucleator and crystallization temperature on the production of β crystal form in isotactic polypropylene. J Appl Polym Sci. 2008;107:958–65.
Wang SW, Yang W, Xu YJ, Xie BH, Yang MB, Peng XF. Crystalline morphology of β-nucleated controlled-rheology polypropylene. Polym Test. 2008;27:638–44.
Lezak E, Bartczak Z. Plastic deformation behavior of β phase isotactic polypropylene in plane-strain compression at elevated temperatures. J Polym Sci Polym Phys. 2008;46:92–108.
Varga J, Menyhárd A. Effect of solubility and nucleating duality of N,N′-dicyclohexyl-2,6-naphthalene dicarboxamide on the supermolecular structure of isotactic polypropylene. Macromolecules. 2007;40:2422–31.
Krache R, Benavente R, Lopez-Majada JM, Perena JM, Cerrada ML, Perez E. Competition between α, β and γ polymorphs in a β-nucleated metallocenic isotactic polypropylene. Macromolecules. 2007;40:6871–8.
Xiao WC, Wu PY, Feng JC, Yao RY. Influence of a novel β-nucleating agent on the structure, morphology, and nonisothermal crystallization behavior of isotactic polypropylene. J Appl Polym Sci. 2009;111:1076–85.
Zhao SC, Cai Z, Xin Z. A highly active novel β-nucleating agent for isotactic polypropylene. Polymer. 2008;49:2745–54.
Yi QF, Wen XJ, Dong JY, Han CC. A novel effective way of comprising a β-nucleating agent in isotactic polypropylene (i-PP): polymerized dispersion and polymer characterization. Polymer. 2008;49:5053–63.
Xiao WC, Wu PY, Feng JC. Effect of β-nucleating agents on crystallization and melting behavior of isotactic polypropylene. J Appl Polym Sci. 2008;108:3370–9.
Bai HW, Wang Y, Liu L, Zhang JH, Han L. Nonisothermal crystallization behaviors of polypropylene with α/β nucleating agents. J Polym Sci Polym Phys. 2008;46:1853–67.
Zhang YF, Xin Z. Isothermal crystallization behaviors of isotactic polypropylene nucleated with α/β compounding nucleating agents. J Polym Sci Polym Phys. 2007;45:590–6.
Shentu BQ, Li JP, Gan TF, Weng ZX. Influence of N,N,N′,N′-tetraalkyl terephthalamide on isothermal crystallization kinetics and morphology evolution of polypropylene. Eur Polym J. 2007;43:3036–41.
Zheng S, Xin Z, Dai GC. Application of β-form nucleating agent for polypropylene II. Non-isothermal crystallization kinetics of polypropylene nucleated by β-form nucleating agent. Huadong Ligong Daxue Xuebao/J East Chin Univ Sci Tech. 2006;32:16–9.
Zhang ZS, Wang CG, Yang ZG, Mai KC. Crystallization behaviors and melting characteristics of PP nucleated by a novel supported β-nucleating agent. Polymer. 2008;49:5137–45.
Zhang ZS, Tao YJ, Yang ZG, Mai KC. Preparation and characteristics of nano-CaCO3 supported β-nucleating agent of polypropylene. Eur Polym J. 2008;44:1955–61.
Tjong SC, Shen JS, Li RKY. Impact fracture toughness of β-form polypropylene. Scripta Metallurgicaet Materalia. 1995;33:503–8.
Karger-Kocsis J, Varga J, Ehrenstein GW. Comparison of the fracture and failure behaviour of injection molded α- and β-polypropylene in high-speed three-point bending tests. J Appl Polym Sci. 1997;64:2059–66.
Varga J. Melting memory effect of the β-modification of polypropylene. J Thermal Anal Calorim. 1986;31:165–72.
Varga J. β-Modification of polypropylene and its two-component systems. J Thermal Anal Calorim. 1989;35:1891–912.
Varga J, Garzó G, Ille A. Kristallisation, Umkristallisation und Schmelzen der. β-Modifikation des polypropylenes. Angew Makromol Chem. 1986;142:171–81.
Shi GY, Cao YH, Zhang XD, Hong J, Hua XG. Multiple melting behavior of β-crystalline phase polypropylene. Chin J Polym Sci. 1992;10:319–27.
Zhang XD, Shi GY. The effect of a β-nucleator on the crystallization and melting behavior of ethylene/propylene random and block copolymer. Thermochim Acta. 1994;235:49–59.
Varga J, Schulek-Toth F. Crystallization, melting and spherulitic structure of β-nucleated random propylene copolymers. J Therm Anal Calorim. 1996;47:941–55.
Yuan Q, Jiang W, An L. Study of β-α recrystallization of the polypropylene. Colloids Polym Sci. 2004;282:1236–41.
Avrami M. Kinetics of phase change: I general theory. J Chem Phys. 1939;7:1103–12.
Avrami M. Kinetics of phase change: II transformation-time relation for random distribution of nuclei. J Chem Phys. 1940;8:212–24.
Avrami M. Kinetics of phase change. III Granulation, phase change and microstructure. J Chem Phys. 1941;9:177–84.
Jeziorny A. Parameters characterizing the kinetics of the non-isothermal crystallization of poly (ethylene terphthalate) determined by DSC. Polymer. 1978;19:1142–9.
Yin JG, Mo ZS. Modern polymer physics. Beijing: Science Press; 2001. p. 101–125
Liu JP, Mo ZS. Crystallization kinetics of polymers. Polym Bull. 1991;4:199–207.
Kissinger HE. Variation of peak temperature with heating rate in differential thermal analysis. J Res Nat’l Bureau Stand. 1956;57:217–21.
Zhang YF, Xin Z. Isothermal and nonisothermal crystallization kinetics of isotactic polypropylene nucleated with substituted aromatic heterocyclic phosphate salts. J Appl Polym Sci. 2006;101:3307–16.
Jang GU, Cho WJ, Ha CS. Crystallization behavior of polypropylene with or without sodium benzoate as a nucleating agent. J Polym Sci Polym Phys. 2001;39:1001–16.
Acknowledgements
The work was supported by Natural Science Foundation of China (Grant No. 50573094, 50873115), Project of Science and Technology of Guangdong Province, China (Grant No. 0711020600002) and Doctoral Fund of Ministry of Education of China.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhang, Z., Chen, C., Wang, C. et al. Nonisothermal crystallization kinetics of isotactic polypropylene nucleated with a novel supported β-nucleating agent. J Therm Anal Calorim 103, 311–318 (2011). https://doi.org/10.1007/s10973-010-0946-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10973-010-0946-y