Highly filled polypropylene (PP) composites incorporated with zero-, one- and two-dimensional nanofillers (0D, 1D and 2D, NFs) were investigated through measuring tensile properties and extrudate swell behaviour. Effects of NFs concentration and particle dimensionality on die swell ratio and tensile properties were identified under the given melt pressure, temperature and shear rate. A static extensional flow mixer with contractional flow gaps was used to improve the dispersion of NFs. Results showed that enhanced tensile properties of PP/NFs were achieved by employing such a mixer. The extrudate swell ratio of the as-prepared PP/NFs was found to exponentially increase with shear rate, linearly increase with melt pressure while linearly decrease with melt temperature. The confining efficiency of particle dimensionality on extrudate swell degree could be ranked from strongest to weakest as 2D (flake), 1D (rod) and 0D (sphere).
YouZ, LiD.Highly filled bamboo charcoal powder reinforced ultra-high molecular weight polyethylene. Mater Lett. 2014;122:121–124. doi: 10.1016/j.matlet.2014.01.010
2.
RuedaMM, FulchironR, MartinG, Rheology of polypropylene filled with short-glass fibers: from low to concentrated filled composites. Eur Polym J. 2017;93:167–181. doi: 10.1016/j.eurpolymj.2017.05.025
3.
JahaniY.Comparison of the effect of mica and talc and chemical coupling on the rheology, morphology, and mechanical properties of polypropylene composites. Polym Adv Technol. 2011;22(6):942–950. doi: 10.1002/pat.1600
4.
KaramipourS, Ebadi-DehaghaniH, AshouriD, Effect of nano-CaCO3 on rheological and dynamic mechanical properties of polypropylene: experiments and models. Polym Test. 2011;30(1):110–117. doi: 10.1016/j.polymertesting.2010.10.009
5.
ThiébaudF, GelinJC.Characterization of rheological behaviors of polypropylene/carbon nanotubes composites and modeling their flow in a twin-screw mixer. Compos Sci Technol. 2010;70(4):647–656. doi: 10.1016/j.compscitech.2009.12.020
6.
WangB, WanT, ZengW.Rheological and thermal properties of polylactide/organic montmorillonite nanocomposites. J App Polym Sci. 2012;125:E364–E371. doi: 10.1002/app.36770
7.
WangM, FanX, ThitsartarnW, Rheological and mechanical properties of epoxy/clay nanocomposites with enhance tensile and fracture toughnesses. Polymer (Guildf). 2015;58:43–52. doi: 10.1016/j.polymer.2014.12.042
8.
SongM, GillYQ, JinJ.Melt flow behaviour of high density polyethylene nanocomposites with 1D, 2D and 3D nanofillers. Nanocomposites. 2015;1(3):160–169. doi: 10.1179/2055033215Y.0000000012
9.
RuedaMM.Rheology and processing of highly filled materials.PhD thesis. Lyon, France: Université de Lyon; 2017.
10.
RuedaMM, AuscherMC, FulchironR, Rheloy and applications of highly filler polymer: A review of current understanding. Prog Polym Sci. 2017;66:22–53. doi: 10.1016/j.progpolymsci.2016.12.007
11.
KourkiH, MortezaeiM, FamiliMHN.Filler networking in the highly nanofilled systems. J Thermoplast Compos. 2016;29(8):1047–1063. doi: 10.1177/0892705714556830
12.
ZhangJ, FangJ, WuJL, Study on the viscosity of polypropylene composites filled with different size and size distribution CaCO3. Polym Composite. 2011;32(7):1026–1033. doi: 10.1002/pc.21117
13.
SarvestaniAS, PicuCR.Network model for the viscoelastic behavior of polymer nanocomposites. Polymer (Guildf). 2004;45(22):7779–7790. doi: 10.1016/j.polymer.2004.08.060
14.
SarvestaniAS.Nonlinear rheology of unentangled polymer melts reinforced with high concentration of rigid nanoparticles. Nanoscale Res Lett. 2010;5(4):791–794. doi: 10.1007/s11671-010-9557-6
15.
KourkiH, MortezaeiM, Navid-FamiliMH.Prediction of the viscoelastic response of filler network in highly nanofilled polymer composites. J Compos Mater. 2015;49:3799–3807. doi: 10.1177/0021998314568800
16.
LiangJZ.Reinforcement and quantitative description of inorganic particulate-filled polymer composites. Compos Part B – Eng. 2013;51(4):224–232. doi: 10.1016/j.compositesb.2013.03.019
17.
KaullyT, SiegmannA, ShachamD.Rheology of highly filled natural CaCO3 composites. I. Effects of solid loading and particle size distribution on capillary rheometry. Polym Compos. 2007;28:512–523. doi: 10.1002/pc.20308
18.
StabikJ.Influence of filler particle geometry on die swell. Int Polym Proc. 2004;19(4):350–355. doi: 10.3139/217.1840
19.
SongYS, YounJR.Influence of dispersion states of carbon nanotubes on physical properties of epoxy nanocomposites. Carbon N Y. 2005;43(7):1378–1385. doi: 10.1016/j.carbon.2005.01.007
20.
LinX, LiK, GoughT, Influence of the morphological structure of carbon nanotubes on the viscoelasticity of PMMA-based nanocomposites. J Appl Polym Sci. 2018;135(27):46444. doi: 10.1002/app.46444
21.
LinX, ZhangK, LiK, Dependence of rheological behaviors of polymeric composites on the morphological structure of carbonaceous nanoparticles. J Appl Polym Sci. 2018;135(26):46416. doi: 10.1002/app.46416
22.
XieX, LiuQ, LiR, Rheological and mechanical properties of PVC/CaCO3, nanocomposites prepared by in situ polymerization. Polymer (Guildf). 2004;45(19):6665–6673. doi: 10.1016/j.polymer.2004.07.045
23.
JoshiM, ButolaBS, SimonG, Rheological and viscoelastic behavior of HDPE/octamethyl-POSS nanocomposites. Macromolecules. 2006;39(5):1839–1849. doi: 10.1021/ma051357w
BarusC.Isothermals, isopiestics and isometrics relative to viscosity. Am J Sci. 1893;s3-45:87–96. doi: 10.2475/ajs.s3-45.266.87
26.
TannerRI.A new inelastic theory of extrudate swell. J Non-Newtonian Fluid Mech. 1980;6(3–4):289–302. doi: 10.1016/0377-0257(80)80007-3
27.
KonagantiVK, AnsariM, MisoulisE, The effect of damping function on extrudate swell. J Non-Newton Fluid. 2016;236:73–82. doi: 10.1016/j.jnnfm.2016.08.007
LiangJZ, ZhongMQ.Melt extrudate swell behavior of polypropylene composites filled with hollow glass beads. J Polym Eng. 2012;32(4–5):259–263. doi: 10.1515/polyeng-2012-0005
31.
MaxwellB, JungA.Hydrostatic pressure effection polymer melt viscosity. Mod Plast. 1957;35(3):174–182.
32.
LinX, KellyA, WoodheadM, Capillary study on geometrical dependence of shear viscosity of polymer melts. J Appl Polym Sci. 2014;131(6):596–602. doi: 10.1002/app.39982
33.
LinX, KellyA, RenDY, Geometrical dependence of viscosity of polymethylmethacry-late melt in capillary flow. J Appl Polym Sci. 2013;130(5):3384–3394. doi: 10.1002/app.39591
34.
LinX, LiuJ, WuC, Experimental evaluation of the pressure sensitivity of molten polymer viscosity with a triple-stage capillary rheometer. Appl Rheol. 2018;28:25503.
35.
TurcsanyiB, PukanszkyB, TudosF.Composition dependence of tensile yieldstress in filled polymers. J Mater Sci Lett. 1988;7:160–162. doi: 10.1007/BF01730605
36.
LiangJZ, WuCB.Effects of glass bead content and surface treatment on mechanical properties of polypropylene composites. J Appl Polym Sci. 2012;123:3054–3063. doi: 10.1002/app.34850
