Effects of organoclay on the compatibility and interfacial phenomena of PE/EVA blends with UCST phase behavior

The compatibilization effects of organically modified nanoclay on the miscibility window, phase separation kinetics, biphasic morphology, interfacial tension, and final properties of polyethylene/ethylene vinyl acetate copolymer blends exhibiting UCST behavior have been investigated. Regardless of blend composition, intercalated nanoclay decreases the phase transition temperatures to lower values and changes the symmetry of phase diagram. The miscibility of PE and EVA phases in the amorphous regions of nanocomposites noticeably enhances and finer biphasic morphology is obtained by the incorporation of organoclay. The pinning influence of the nanofiller on polymer chain diffusion causes much slower phase separation kinetics for the nanocomposites. Similar to conventional compatibilizers such as block copolymers, the interfacial activity of nanoclay leads to a sharp decline in the interfacial tension of PE/EVA up to 2-orders of magnitude. Moreover, the results show that imposing restrictions on the phase separation phenomenon increases the impact strength of the virgin blend and related nanocomposite. However, this improvement has been much more noticeable in the presence of nanoparticles, which is due to the simultaneous roles of organoclay as an effective compatibilizer and reinforcement. POLYM. COMPOS., 35:2329–2342, 2014. © 2014 Society of Plastics Engineers

[1]  H. Modarress,et al.  Phase behavior of UCST blends: Effects of pristine nanoclay as an effective or ineffective compatibilizer , 2013 .

[2]  Jianping Gao,et al.  Phase separation of poly (methyl methacrylate) / poly (styrene-co-acrylonitrile) blends in the presence of silica nanoparticles , 2012 .

[3]  H. Garmabi,et al.  COMPATIBILISED LDPE/LLDPE/NANOCLAY NANOCOMPOSITES: I. STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES , 2011 .

[4]  H. Choi,et al.  Ternary Poly(styrene‐co‐acrylonitrile)/Poly(vinyl chloride) Blend Composites with Multi‐Walled Carbon Nanotubes and Enhanced Physical Characteristics , 2010 .

[5]  C. Bailly,et al.  Localization of carbon nanotubes at the interface in blends of polyamide and ethylene-acrylate copolymer , 2010 .

[6]  D. R. Paul,et al.  Morphology and Mechanical Properties of Rubber Toughened Amorphous Polyamide/MMT Nanocomposites , 2010 .

[7]  Faramarz Gordaninejad,et al.  Energy absorption capability of nanocomposites: A review , 2009 .

[8]  P. Cassagnau,et al.  Immiscible polymer blends stabilized with nano-silica particles: Rheology and effective interfacial tension , 2008 .

[9]  F. Goharpey,et al.  Rheologically Determined Phase Behavior of LCST Blends in the Presence of Spherical Nanoparticles , 2008 .

[10]  A. Zeghloul,et al.  Effect of shear on phase-separation in polystyrene/poly(vinyl methyl ether)/ organoclay nanocomposites. , 2008, Journal of Nanoscience and Nanotechnology.

[11]  G. Michler,et al.  Effect of nanoparticle size and size‐distribution on mechanical behavior of filled amorphous thermoplastic polymers , 2007 .

[12]  Yong K Kim,et al.  Interfacial tension reduction in PBT/PE/clay nanocomposite , 2007 .

[13]  A. Balazs,et al.  Determining the phase behavior of nanoparticle‐filled binary blends , 2006 .

[14]  M. Bousmina,et al.  Phase separation of polystyrene/poly(vinylmethylether)/organoclay nanocomposites. , 2006, Journal of Nanoscience and Nanotechnology.

[15]  S. Jana,et al.  Nanoclay-induced morphology development in chaotic mixing of immiscible polymers , 2005 .

[16]  Yajiang Huang,et al.  Effect of fillers on the phase stability of binary polymer blends: A dynamic shear rheology study , 2005 .

[17]  V. Ginzburg.  Influence of Nanoparticles on Miscibility of Polymer Blends. A Simple Theory , 2005 .

[18]  M. Bousmina,et al.  Role of organically modified layered silicate as an active interfacial modifier in immiscible polystyrene/polypropylene blends , 2004 .

[19]  Rafael Tadmor,et al.  Line energy and the relation between advancing, receding, and young contact angles. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[20]  Q. Fu,et al.  Kinetics-controlled compatibilization of immiscible polypropylene/polystyrene blends using nano-SiO2 particles , 2004 .

[21]  Harald Ade,et al.  Compatibilizing Bulk Polymer Blends by Using Organoclays , 2004 .

[22]  A. Karim,et al.  Phase Behavior of PS - PVME Nanocomposites , 2004 .

[23]  Eric J. Amis,et al.  Influence of Layered Silicates on the Phase-Separated Morphology of PS−PVME Blends , 2003 .

[24]  H. Frisch,et al.  The use of functionalized nanoparticles as non‐specific compatibilizers for polymer blends , 2003 .

[25]  Q. Fu,et al.  Compatibilization of Immiscible Poly(propylene)/Polystyrene Blends Using Clay , 2003 .

[26]  D. A. Nesterov,et al.  Effect of polymer–filler surface interactions on the phase separation in polymer blends , 2002 .

[27]  D. Vlassopoulos,et al.  Effect of maleic anhydride content on the rheology and phase behavior of poly(styrene-co -maleic anhydride)/ poly(methyl methacrylate) blends , 2002 .

[28]  Xiaohong Gu,et al.  Mapping Polymer Heterogeneity Using Atomic Force Microscopy Phase Imaging and Nanoscale Indentation , 2000 .

[29]  Feng Qiu,et al.  Multi-Scale Model for Binary Mixtures Containing Nanoscopic Particles , 2000 .

[30]  Y. Lipatov,et al.  Compatibilizing effect of a filler in binary polymer mixtures , 1999 .

[31]  Y. Lipatov,et al.  Filler effects on the compatibility and phase separation kinetics of poly(vinyl acetate)-poly(methyl methacrylate) mixtures , 1992 .