Influence of ethylene–propylene–diene terpolymer addition on processing parameters,phase structure and thermal behaviour of polypropylene/low-density polyethylene blends
Restricted accessResearch articleFirst published online October, 2015
Influence of ethylene–propylene–diene terpolymer addition on processing parameters,phase structure and thermal behaviour of polypropylene/low-density polyethylene blends
The influence of blend composition and ethylene–propylene–diene terpolymer (EPDM) content on the processing parameters, phase structure and thermal behaviour of polypropylene (PP) and low-density polyethylene (LDPE) blends was studied. Processing parameters of blends in twin-screw extruder were followed by output (Q), torque (TQ) and back pressure (p), and apparent viscosity as given by TQ/Q and p/Q ratios, while the thermal behaviour was measured using differential scanning calorimetry. Phase structure was investigated using scanning transmission electron microscopy (STEM). The degree of crystallinity (χc) of PP phase decreased and χc of LDPE phase increased with higher LDPE content in blends with and without EPDM. STEM micrographs of EPDM compatibilized PP/LDPE blends of compositions 80/20 and 20/80 showed particulate morphology, whereas in the blends of compositions 60/40 and 40/60 the morphology was co-continuous. The EPDM compatibilizer was localized on the interface.
Vranjes PenavaNRekVFiamengo HouraI. Effect of EPDM as a compatibilizer on mechanical properties and morphology of PP/LDPE blends. J Elast Plast2013; 45(4): 391–403.
2.
TehJWRudinAKeungJC. A review of polyethylene–polypropylene blends and their compatibilization. Adv Polym Tech1994; 13(1): 1–23.
3.
LivanovaNMPopovaESLednevaOA. Properties and phase structure of the poly(propylene)–low-density poly(ethylene) blends. Int J Polymer Mater2000; 47(2–3): 279–291.
4.
AlbanoCDe NavarroUOguraM. Estudio de la morfologia de la polimezcla PP/PELD. In: Mem-Simp Latinoam Polim, Caracas, Venezuela, 28 September–2 October 1992, paper no. 3, pp. 331–335. Caracas, Venezuela: Universidad Simòn Bolìvar.
5.
PetronyukJSPriadilovaOVLevinVM. Structure and elastic properties of immiscible LDPE–PP blends: dependence on composition. Mater Res Soc Symp Proc2002; 740: 261.
6.
WongACYLamF. Study of selected thermal characteristics of polypropylene/polyethylene binary blends using DSC and TGA. Polym Test2002; 21(6): 691–696.
7.
FortelnýIKrulišZMichálkováD. Effect of EPDM admixture and mixing conditions on morphology and mechanical properties of LDPE/PP blends. Die Angew Makromol Chem1996; 238(1): 97–104.
8.
De GrooteP. Technical Report from APME, 1995.
9.
BarlowJWPaulDR. Mechanical compatibilization of immiscible blends. Polym Eng Sci1984; 24(8): 525–534.
10.
Chang-SikHHae-DongPYoungkyooK. Compatibilizer in polymer blends for the recycling of plastics waste I: preliminary studies on 50/50 wt% virgin polyblends. Polym Adv Technol1996; 7(5): 483–492.
HaCSKimSC. Rheological properties and crystalline structure of the dynamically cured EPDM and PP/HDPE ternary blends. J Appl Polym Sci1988; 35(8): 2211–2221.
15.
ChoudharyVVarmaHSVarmaIK. Effect of EPDM rubber on melt rheology, morphology and mechanical properties of polypropylene/HDPE (90/10) blend. 2. Polymer1991; 32(14): 2541–2545.
16.
WangDZhangZYingS. The component distribution, compatibility and crystallization behavior of PP/HDPE/EPDM ternary blends. Gaofenzi Xuebao1991; 1(4): 390–397.
SloufMKolarikJKotekJ. Rubber-toughened polypropylene/acrylonitrile-co-butadiene-co-styrene blends: phase structure and mechanical properties. Polym Eng Sci2007; 47: 582–592.
19.
UtrackiLA. Commercial polymer blends. London, UK: Chapman and Hall, 1998.
20.
JaziriM. Investigation of the grafting of maleic anhydride onto ABS in the molten state influence of the obtained compound on the elaboration and properties of blends of polycarbonate with ABS. PhD Thesis, University of Jean Monnet, Saint Etienne, France, 1992, pp. 193–207.
21.
LucianiAJarrinJ. Morphology development in immiscible polymer blends. Polym Eng Sci1996; 36(12): 1619–1626.
KalogerasIMHagg LoblandHE. The nature of the glassy state: structure and transitions. J Mater Ed2012; 34(3–4): 69–94.
24.
SuleimanMAHusseinIA. Implications of LDPE branching and Mw on thermal and mechanical properties of PP/LDPE blends. Macromol Symp2008; 263(1): 130–137.
25.
DongLOlleyRHBassettDC. On morphology and the competition between crystallization and phase separation in polypropylene–polyethylene blends. J Mater Sci1998; 33(16): 4043–4048.
26.
LiJShanksRAOlleyRH. Miscibility and isothermal crystallisation of polypropylene in polyethylene melts. Polymer2001; 42(18): 7685–7694.
27.
JoseSApremASFrancisB. Phase morphology, crystallisation behaviour and mechanical properties of isotactic polypropylene/high density polyethylene blends. Eur Polym J2004; 40(9): 2105–2115.
28.
WunderlichB. Thermal analysis. New York, NY: Academic Press, 1990.
29.
ChoudharyVVarmaHSVarmaIK. Polyolefin blends: effect of EPDM rubber on crystallization, morphology and mechanical properties of polypropylene/EPDM blends. 1. Polymer1991; 32(14): 2534–2540.
