Effects of nanometer-TiO 2 surface modification and concentration on the mechanical performances of polypropylene/polyamide maleic anhydride-grafted polypropylene composite
Restricted accessResearch articleFirst published online December, 2013
Effects of nanometer-TiO 2 surface modification and concentration on the mechanical performances of polypropylene/polyamide maleic anhydride-grafted polypropylene composite
A new hyperdispersant agent with maleic anhydride monoester as anchoring group, butylmethacrylate as solventable chain, and styrene (St) as functional group was synthesized, and named SMB. Also, the effects of nanometer-TiO2 (nano-TiO2) modification and concentration on the mechanical properties of polypropylene/polyamide/maleic anhydride-grafted polypropylene (70/30/5 by weight) composites were investigated. The experimental results indicated that the mechanical properties of polypropylene/polyamide 6/M blend reduced with the addition of p-TiO2 (unmodified nano-TiO2) due to the aggregation of nanoparticles, but improved by the addition of t-TiO2 (modified by titanate coupling agent TDI) or SMB-TiO2 (modified by hyperdispersant agent SMB), and SMB-TiO2 seemed to be more effective. The optimum content of SMB-TiO2 was found to be 3 wt%. In order to understand the reinforcing mechanisms of nanoparticles, SEM and TEM pictures were carried out, which revealed that SMB-TiO2 mainly distributed at the interface of polypropylene and polyamide 6 in nanoscale as compatibilizer. It could be due to the surface of nano-TiO2 coated with SMB, and the carboxy group of SMB could react with the functional group of PA6; meanwhile, the solventable chain had good compatibility with PP, and so the interaction between PP and PA6 increased in the presence of SMB-TiO2. Consequently, PP/PA6/M blend could be simultaneously strengthened and toughened by SMB-TiO2.
NaliniRNagarajianSReddyBSR. Thermoplastic polyolefin nanocomposites: effect of mechanical, thermal, and morphological properties. J Reinf Plast Comp2011; 30: 319–324.
2.
TarawnehMAAhmadSHNoumSYE. Thermoplastic natural rubber composites reinforced with OMMT, MWNTs, and hybrid OMMT–MWNTs. J Reinf Plast Comp2011; 30: 1745–1752.
3.
TarawnehMAAhmadSHRasidR. The enhancement of properties of TPNR/clay nanocomposites using ultrasonic treatment. J Reinf Plast Comp2011; 30: 524–532.
4.
LiDXOuBLJiaDM. Effects of polypropylene-g-dibutyl maleate on mechanical and rheological properties of PP/PA6 blends. e-Polymers2009; 143: 1–11.
5.
KusmonoIshakZAMChowWS. Effects of compatibilizers and testing speeds on the mechanical properties of organophilic montmorillonite filled polyamide 6/polypropylene nanocomposites. Polym Eng Sci2010; 50: 1493–1504.
6.
ChowWSIshakZAMIshiakuUS. The effect of organoclay on the mechanical properties and morphology of injection-molded polyamide6/polypropylene nanocomposites. J Appl Polym Sci2004; 91: 175–189.
7.
ChowWSIshakZAMKarger-KocsisJ. Compatibilizing effect of maleated polypropylene on the mechanical properties and morphology of injection molded polyamide6/polypropylene/organoclay nanocomposites. Polymer2003; 44: 7427–7440.
8.
KusmonoIshakZAMChowWS. Effect of clay modification on the morphological, mechanical, and thermal properties of polyamide 6/polypropylene/montmorillonite nanocomposites. Polym Compos2010; 31: 1156–1167.
9.
FengMGongFLZhaoCG. Effect of clay on the morphology of blends of poly (propylene) and polyamide 6/clay nanocomposites. Polym Int2004; 53: 1529–1537.
10.
LuoYBLiWDWangXL. Preparation and properties of nanocomposites based on poly(lactic acid) and functionalized TiO2. Acta Mater2009; 57: 3182–3191.
11.
LuXLLvXQSunZJ. Nanocomposites of poly (l-lactide) and surface-grafted TiO2 nanoparticles: synthesis and characterization. Eur Polym J2008; 44: 2476–2481.
12.
ChatterjeeA. Effect of nanoTiO2 addition on poly(methylmethacrylate): an exciting nanocomposite. J Appl Polym Sci2010; 116: 3396–3407.
13.
SahaMCKabirMEJeelaniS. Enhancement in thermal and mechanical properties of polyurethane foam infused with nanoparticles. Mater Sci Eng A2008; 479: 213–222.
14.
VaniJMohantySSParvaizMR. Influence of nanoclays and nano-TiO2 on the mechanical and thermal properties of polycarbonate nanocomposite. Macromol Res2011; 19: 563–572.
15.
LiLShiLYZhangY. Poly(ethylene terephalate) prepolymer graft modification of nano-TiO2 and its effect on mechanical property of polycarbonate nanocomposites. Mater Sci Technol-Lond2009; 25: 1028–1034.
16.
WacharawichanantSSangkhaphanANguanwongNS. Effects of particle type on thermal and mechanical properties of polyoxymethylene nanocomposites. J Appl Polym Sci2012; 123: 3217–3224.
17.
RusuGRusuE. Anionic nylon 6/TiO2 composite materials: effects of TiO2 filler on the thermal and mechanical behavior of the composites. Polym Compos2012; 33: 1557–1569.
18.
KaleelSHABahuleyanBKMasihullahJ. Thermal and mechanical properties of polyethylene/doped-TiO2 nanocomposites synthesized using in situ polymerization. J Nanomater2011; 2011: 1–6.
19.
RaznjouAMansouriJChenV. The effects of mechanical and chemical modification of TiO2 nanoparticles on the surface chemistry, structure and fouling performance of PES ultrafiltration membranes. J Membr Sci2011; 378: 73–84.
20.
ArunKVKumarDSMurugeshMC. Effect of TiO2 and ZnS fillers on the bearing strength of gfrp composites. J Reinf Plast Comp2012; 31: 1088–1096.
21.
GhoshPKPathakAGoyatMS. Influence of nanoparticle weight fraction on morphology and thermal properties of epoxy/TiO2 nanocomposite. J Reinf Plast Comp2012; 31: 1180–1188.
22.
DekaBKMajiTK. Effect of TiO2 and nanoclay on the properties of wood polymer nanocomposite. Compos A2011; 42: 2117–2125.
23.
NguyenVGLinsmeierCJangMK. Preparation of polypropylene/TiO2 nanocomposites using modified TiO2 nanoparticles. Kgk-Kautschuk Gummi Kunststoffe2012; 65: 63–67.
24.
Yang Q, Zhang BH, Mao ZP, et al. Preparation and properties of PP/hyperdispersant/nano-TiO2 composites. In: Proceedings of the 2007 international conference on advanced fibers and polymer materials, Shanghai, China, 2007, pp.1011–1013.
25.
BittmannBHaupertFSchlarbAK. Preparation of TiO2/epoxy nanocomposites by ultrasonic dispersion and their structure property relationship. Ultrason Sonochem2011; 18: 120–126.
26.
RoyCGonzalezAVGarcia-GonzalezCA. Assessment of scCO2 techniques for surface modification of micro- and nanoparticles: Process design methodology based on solubility. J Supercrit Fluid2010; 54: 362–368.
27.
LuoYBWangXLXuDY. Preparation and characterization of poly (lactic acid)-grafted TiO2 nanoparticles with improved dispersions. Appl Surf Sci2009; 255: 6795–6801.
28.
OuBLLiDX. The effect of functionalized-TiO2 on the mechanical properties of PP/PA6/functionalized-TiO2 nanocomposites prepared by reactive compatibilization technology. J Compos Mater2009; 43: 1361–1372.
29.
RongYChenHZWuG. Preparation and characterization of titanium dioxide nanoparticle/polystyrene composites via radical polymerization. Mater Chem Phys2005; 91: 370–374.
LiWJKarger-KocsisJThomannR. Compatibilization effect of TiO2 nanoparticles on the phase structure of PET/PP/TiO2 nanocomposite. J Polym Sci Part B: Polym Phys2009; 47: 1616–1624.
32.
EliasLFenouillotFMajesteJC. Morphology and rheology of immiscible polymer blends filled with silica nanoparticles. Polymer2007; 48: 6029–6040.
33.
ZhangQYangHFuQ. Kinetics-controlled compatibilization of immiscible polypropylene/polystyrene blends using nano-SiO2 particles. Polymer2004; 45: 1913–1922.
34.
MaCGMaiYLRongMZ. Phase structure and mechanical properties of ternary polypropylene/elastomer/nano-CaCO3 composites. Compos Sci Technol2007; 67: 2997–3005.
35.
ShelleyJSMatherPTDevriesKL. Reinforcement and environmental degradation of nylon-6/clay nanocomposites. Polymer2001; 42: 5849–5858.
