Introduction of primary chemical bonding in lignin-based PP composites for mechanical reinforcement via reactive extrusion
- Authors
- Gil, Bo Min; Song, Seo Won; Lee, Jong Hyeok; Jeon, Jisoo; Lee, Kwang Hee; Wie, Jeong Jae
- Issue Date
- May-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Polymer-matrix composites (PMCs); Wood; Mechanical properties; Extrusion
- Citation
- COMPOSITES PART B-ENGINEERING, v.165, pp.510 - 515
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPOSITES PART B-ENGINEERING
- Volume
- 165
- Start Page
- 510
- End Page
- 515
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189881
- DOI
- 10.1016/j.compositesb.2019.02.014
- ISSN
- 1359-8368
- Abstract
- Lignin is a by-product of paper and pulp production resulting from extraction of cellulose, the world's most abundant natural polymer. In this study, we manufactured polypropylene (PP)/PP-grafted maleic anhydride (PP-g-MAH)/glass fiber (GF)/lignin composites via reactive extrusion process for value-addition of lignin, often discarded as wood waste. To enhance adhesion in composites at interphases, diisocyanate was added in-situ during the extrusion process, leading to chemical primary bonding. Structure-property relationship of PP/PP-g-MAH/GF/lignin composites revealed two different reinforcement mechanisms that were supported by FT-IR, TGA, hardness, tensile, flexural, and impact tests, SEM, and density. Up to 7.5 wt% of isocyanate loading, linear urethane bonding was formed; further addition of isocyanate resulted in evolution of chemical crosslinking via allophanate bonding.
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