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- W2369871288 abstract "Polyurethane(PU) prepolymer was synthesized by using 4,4′-diphenylmethane diisoyanate(MDI-100),liquidated-MDI(C-MDI),MDI-50 and polytetramethylene glycol(PTMG) as raw materials.Polyurethane elastomers were prepared with KD and KC as chain extenders.The mechanical properties of the prepared PU elastomer were investigated.The results showed that the hardness,tear strength and impact elasticity decreased rapidly with the increase of mass fraction of 1,3-butanediol.The MDI / PU had the best mechanical property,C-MDI/PU lower,MDI-50/PU was lowest.The hardness,300% modulus and tear strength was enhanced rapidly with the increase of mass fraction of NCO in prepolymer,but elongation at break and impact elasticity was decreased.The 300% modulus,tensile strength and tear strength of PU were increased when Mn of soft segment was 1 000;the elongation and impact elasticity of PU were increased when molecular weight of soft segment was more than 1 800." @default.
- W2369871288 created "2016-06-24" @default.
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- W2369871288 date "2011-01-01" @default.
- W2369871288 modified "2023-09-27" @default.
- W2369871288 title "Effect of 1,3-Butanediol on Mechanical Properties of Polyurethane Elastomers Based on PTMG/MDI" @default.
- W2369871288 hasPublicationYear "2011" @default.
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