Study Of POE,INFUSE,SEBS And LLDPE Effect To Microstructure?Properties And Transparency Of Polypropylene

In this paper,two kinds of polypropylene resin with different models(T30s,RP344P-K)were blended and modified by double-screw extruder by physical blending.This paper main study three different types of ethylene-octene copolymer(POE),olefin block copolymer(INFUSE),linear low density polyethylene(LLDPE)and SEBS were blended with two different types of polypropylene for structure and performance.(1)Through the transparent modification of two kinds of PP(T30s?RP344P-K)and POE(DF 740,DF 840,DF 940),INFUSE and LLDPE.The research results:DF 940 POE has the best transparent,the second is INFUSE,LLDPE is poor.When the RP344P-K PP/DF 940 POE,RP344P-K PP/INFUSE,RP344P-K PP/LLDPE were 100/10,100/10,100/10,the transmittance of the blend respectively was 86.5%,85.9%,85.2%,the haze of the blend respectively was 13.7%,20.1%,20.8%.When the T30s PP/DF 940 POE,T30s PP/INFUSE,T30s PP/LLDPE were 100/10,100/10,100/10,the transmittance of the blend respectively was 86%?84%?83%,the haze of the blend respectively was 42%?38%?38%.(2)LLDPE,SEBS respectively used modified with RP344P-K PP/DF 940 POE(100/10),RP344P-K PP/INFUSE(100/10).It was found that the transparent modification effect of SEBS was better than LLDPE.When the PP/DF 940 POE/SEBS was 100/10/10,the transmittance of the blend reached 86%and the haze was 20%,low temperature impact strength increased by 1.82 times,was 27.6 KJ/m2,elongation at break up to 614.1%,tensile strength of 23.4 MPa.When PP/INFUSE/SEBS was 100/10/10,the transmittance of the blend reached 85%and the haze was 24%.(3)LLDPE,SEBS respectively used modified with T30s PP/DF 940 POE(100/10),T30s PP/INFUSE(100/10).It was found that the transparent modification effect of SEBS was excellent LLDPE.When the PP/DF 940 POE/SEBS was 100/10/10,the transmittance of the blend reached 84.9%and the haze was 18.7%,low temperature impact strength increased by 1.61 times,was 27.0 KJ/m,elongation at break up to 520.3%,tensile strength of 18MPa.When PP/INFUSE/SEBS was 100/10/10,the transmittance of the blend reached 80.7%and the haze was 24.6%.(4)When the RP34P-K/T30s was 80/20,the optical properties were better,the transmittance was 86.1%,the haze was 20.1%,the low temperature impact strength was 31.4 KJ/m2,and the elongation at break was 258.8%,the tensile strength was 25.8 MPa.The blends of RP34P-K/T30s(80/20)were modified by POE and SEBS.It was found that the blends had good transmission when RP34P-K/T30s/SEBS was 80/20/10),the transmittance and haze were 86.1%?20.4%,the elongation at break was 465.4%,the tensile strength was 19.7 MPa,and the low temperature impact strength was 35.9 KJ/m2.(5)For the T30s PP/DF 940 POE,RP34P-K/DF 940 POE and RP34P-K/T30s,it was found that the addition of SEBS caused the crystallization temperature of polypropylene to decrease,the corresponding crystallinity decreased and the thermal decomposition temperature increased.Polarized microscopic observation showed that the addition of SEBS reduced the size of the PP crystals.Indicating that SEBS enhancing its transparency.