Ductility improvement of high density polyethylene (HDPE)-modified bitumen through adding modified lignin

International Seminar on Metallurgy and Materials

Septimorien, E.A.^1 ; Friskila, L.M.D.^1 ; Natasya, B.^1 ; Chalid, M.^1

Department of Metallurgical and Materials Engineering, Universitas Indonesia, Depok

16424, Indonesia^1

关键词: Bipolar characteristics;    Ductility improvement;    High density polyethylene(HDPE);    Modified bitumen;    Modified lignins;    Non-polar;    Polymer-modified bitumen;    Sample preparation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/541/1/012035/pdf
DOI  :  10.1088/1757-899X/541/1/012035

来源: IOP

【 摘 要 】

High Density Polyethylene (HDPE) is added to bitumen to improve the mechanical properties as Polymer Modified Bitumen (PMB), but both of them have different chemical properties. To achieve best mechanical properties of the mixture coupling agent is needed such as lignin that has bipolar characteristic. In the previous research, unmodified lignin tendency of polarity is bigger thus modified with polyurethanee PEG to increase its non-polar parts. In order to confirm the potential of modified lignin as a coupling agent for HDPE-Modified Bitumen. Several stages of this experiment consists of sample preparation, characterization of raw materials, mixing, and characterization of the PE-Modified Bitumen. This experiment used hot melt mixing to mix modified lignin, HDPE, and bitumen. The result of this experimental was analysed by using Ductility test, FTIR and FESEM. The addition of modified lignin to HDPE-Modified Bitumen increase distribution and dispersion of HDPE particulates inside bitumen matrix, increasing PMB HDPE mechanical properties. Furthermore, FESEM characterization indicated that the addition of modified lignin gave better mixing of PE-Bitumen. FTIR showed an increase of intensities at non-polar peaks, and down at polar peaks compared with unmodified lignin. Ductility test showed that modified lignin has better compatibility as coupling agent than unmodified lignin. From this experiment, modified lignin can improve mixing between HDPE and Bitumen better than modified lignin. So, we can use modified lignin as the new coupling agent.