Structure and properties of nanocomposites based on poly(butylene succinate) and supercritical carbon dioxide-processed montmorillonite

Abstract

Montmorillonite is intercalated with different amounts of tetradecyltrihexylphosphonium chloride in supercritical carbon dioxide and poly(butylene succinate)-based nanocomposites are prepared with the organically modified or commercial organoclay via melt-mixing. The effect of amount of tetradecyltrihexylphosphonium chloride on the structure of organically modified montmorillonite tactoids, organically modified montmorillonite dispersion and finally on properties of nanocomposites is systematically investigated. Different from the compact spherical structure for pristine montmorillonite tactoids, flexible expanded structure with large cavities on the surface can be obtained for organically modified montmorillonites, and their structure show slight difference with the tetradecyltrihexylphosphonium chloride amount. It is interesting to find that, despite almost no polymer molecule being intercalated into the interlayer, significant dispersion can be achieved for the scCO₂-processed organically modified montmorillonite in polymer matrix, due to the easily broken tactoid structure. It is noteworthy, montmorillonite-tetradecyltrihexylphosphonium chloride 08, which is modified with 0.8 CEC tetradecyltrihexylphosphonium chloride, less than in most of the literature, shows almost the same degree of dispersion in poly(butylene succinate) matrix as commercial montmorillonite, which has a stronger interaction with the polymer. Differential scanning calorimetry and dynamic modulus analysis results demonstrate that the crystallization temperature and storage modulus of poly(butylene succinate)-based nanocomposites increase with the amount of tetradecyltrihexylphosphonium chloride, and montmorillonite-tetradecyltrihexylphosphonium chloride08/poly(butylene succinate) shows even higher crystallization temperature and low-temperature storage modulus compared to commercial montmorillonite/poly(butylene succinate).

Keywords

Montmorillonite supercritical carbon dioxide nanocomposites dispersion

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References

Ray

Okamoto

. Structure−property relationship in biodegradable poly(butylene succinate)/layered Silicate nanocomposites. Macromolecules 2003; 36: 2355–2367.

Chuayjuljit

Worawas

. Nanocomposites of EVA/polystyrene nanoparticles/montmorillonite. J Compos Mater 2010; 45: 631–638.

Choi

Jung

Yeom

. Mechanical, thermal, barrier, and rheological properties of poly(ether-block-amide) elastomer/organoclay nanocomposite prepared by melt blending. Polym Eng Sci 2013; 53: 982–991.

Fornes

Hunter

Paul

. Nylon-6 nanocomposites from alkylammonium-modified clay: the role of alkyl tails on exfoliation. Macromolecules 2004; 37: 1793–1798.

Chen

Yoon

. Nonisothermal crystallization kinetics of poly(butylenes succinate) composites with a twice functionalized organoclay. J Polym Sci Part B Polym Phys 2005; 43: 817–826.

Xie

Gao

Liu

. Thermal characterization of organically modified montmorillonite. Thermochim Acta 2001; 367: 339–350.

Jash

Wilkie

. Effects of surfactants on the thermal and fire properties of poly(methyl methacrylate)/clay nanocomposites. Polym Degrad Stab 2005; 88: 401–406.

Zhao

Qin

Gong

. Mechanical, thermal and flammability properties of polyethylene/clay nanocomposites. Polym Degrad Stab 2005; 87: 183–189.

Xie

Gao

Pan

. Thermal degradation chemistry of alkyl quaternary ammonium montmorillonite. Chem Mater 2001; 13: 2979–2990.

10.

Ding

. Structure of organoclays—an X-ray diffraction and thermogravimetric analysis study. J Colloid Interface Sci 2004; 277: 116–120.

11.

Frost

. Modification of the surfaces of Wyoming montmorillonite by the cationic surfactants alkyl trimethyl, dialkyl dimethyl, and trialkyl methyl ammonium bromides. J Colloid and Interface Sci 2007; 305: 150–158.

12.

Akbarinezhada

Sabouri

. Synthesis of exfoliated conductive polyaniline–graphite nanocomposites in supercritical CO₂. J Supercrit Fluids 2013; 75: 81–87.

13.

Yang

Wang

Ren

. Supercritical CO₂-assisted preparation of 3D graphene-pyrrole/carbon nanotubes/polyaniline nanoarchitectures for efﬁcient supercapacitor electrodes. Mater Lett 2015; 139: 471–474.

14.

Naveau

Dominkovics

Detrembleur

. Effect of clay modification on the structure and mechanical properties of polyamide-6 nanocomposites. Europ Polym J 2011; 47: 5–15.

15.

Manitiu

Bellair

Horsch

. Supercritical carbon dioxide-processed dispersed polystyrene−clay nanocomposites. Macromolecules 2008; 41: 8038–8046.

16.

Naveau

Calberg

Detrembleur

. Organomodification of montmorillonite in supercritical carbon dioxide. Appl Clay Sci 2011; 51: 467–472.

17.

Horsch

Serhatkulu

Gulari

. Supercritical CO₂ dispersion of nano-clays and clay/polymer nanocomposites. Polymer 2006; 47: 7485–7496.

18.

Yang

Manitiu

Kriegel

. Structure, permeability, and rheology of supercritical CO₂ dispersed polystyrene-clay nanocomposites. Polymer 2014; 55: 3915–3924.

19.

Qin

. Inﬂuence of physical state of intercalating agents on intercalation process of high speed airﬂow pretreated montmorillonite in supercritical carbon dioxide. Adv Powder Tech 2014; 25: 1786–1792.

20.

Qin

Yao

. Effect of intercalation method and intercalating agent type on the structure of silane-grafted montmorillonite. Clay Clay Minerals 2013; 61: 580–589.

21.

Zhang

Han

. Solubility of room-temperature ionic liquid in supercritical CO₂ with and without organic compounds. Chem Commun 2003; 12: 1412–1413.

22.

Xie

Pan

. Thermal stability of quaternary phosphonium modified montmorillonites. Chem Mater 2002; 14: 4837–4845.

23.

Feng

Hao

. Effects of organoclay modifiers on the flammability, thermal and mechanical properties of polycarbonate nanocomposites filled with a phosphate and organoclays. Polym Degrad Stab 2012; 97: 108–117.

24.

Ellis

D'Angelo

. Thermal and mechanical properties of a polypropylene nanocomposite. J Appl Polym Sci 2003; 90: 1639–1647.

25.

Someya

Nakazato

Teramoto

. Thermal and mechanical properties of poly(butylenes succinate) nanocomposites with various organo-modiﬁed montmorillonites. J Appl Polym Sci 2004; 91: 1463–1475.

26.

Bellair

Manitiu

Gulari

. Investigation of clay modifier effects on the structure and rheology of supercritical carbon dioxide-processed polymer nanocomposites. J Polym Sci Part B Polym Phys 2010; 48: 823–831.

27.

Vaia

Teukolsky

Giannelis

. Interlayer structure and molecular environment of alkylammonium layered silicates. Chem Mater 1994; 6: 1017–1022.

28.

Vermogen

Masenelli-Varlot

Seguela

. Evaluation of the structure and dispersion in polymer-layered silicate nanocomposites. Macromolecules 2005; 38: 9661–9669.

29.

Hwang

Khaydarov

Park

. Effects of clay modification on crystallization behavior, physical, and morphological properties of poly(butylene terephthalate) nanocomposites. Macromol Res 2011; 19: 699–710.

30.

Zhou

Fan

. Nonisothermal crystallization kinetics of poly(butylene terephthalate) montmorillonite nanocomposites. J Appl Polym Sci 2006; 99: 3257–3265.

31.

Yasuniwa

Tsubakihara

Satou

. Multiple melting behavior of poly(butylene succinate).II. Thermal analysis of isothermal crystallization and melting process. J Polym Sci Part B Polym Phys 2005; 43: 2039–2047.

32.

Tan

. The crystallization behavior of the metastable melts of poly(ethylene terephthalate) from the multiple melting process. Macromol Rapid Commun 1998; 19: 11–14.