Improvement of polypropylene (PP)-modified bitumen through lignin addition

Polypropylene (PP) is usually added to bitumen to improve its mechanical properties, however, both of them have different chemical properties. To achieve best mechanical properties of the mixture, coupling agent such as lignin is importantly required. Lignin is an amorphous biopolymer, has bipolar c...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-07, Vol.223 (1), p.12028
Main Authors: Yuanita, E, Hendrasetyawan, B E, Firdaus, D F, Chalid, M
Format: Article
Language:English
Subjects:
Addition polymerization
Biopolymers
Bitumens
Carbonyls
Chemical properties
Coupling (molecular)
Coupling agents
Experiments
Lignin
Mechanical properties
Polypropylene
Raw materials
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Summary:Polypropylene (PP) is usually added to bitumen to improve its mechanical properties, however, both of them have different chemical properties. To achieve best mechanical properties of the mixture, coupling agent such as lignin is importantly required. Lignin is an amorphous biopolymer, has bipolar characteristic due to its distinct chemical function which has carbonyl, carboxyl, hydroxyl and phenol chemical function. Otherwise, bitumen and PP have polar and non-polar characteristic, respectively. In the previous research, it is found that lignin is potential to be used as coupling agent. In order to confirm the potential of lignin as a coupling agent, there are various compounds of lignin on PP-bitumen mixtures used in this research. This experiment consists of several stages, ranging from sample preparation, characterization of raw materials, mixing, and characterization of the PP-Modified Bitumen. This experiment used hot melt mixing to mix lignin, PP, and bitumen. The result of this experimental was analyzed by using FTIR and FESEM. The addition of lignin make Polymer Modified Bitumen (PMB) getting better mixing and increase mechanical properties. Furthermore, FESEM characterization indicated that the addition of lignin gave better mixing of PP-Bitumen. FTIR showed a new chemical structure due to the addition of lignin. From this experiment, the addition of lignin can improve mixing between PP and Bitumen. So, we can use lignin as coupling agent.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/223/1/012028