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Title: Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density

Authors:
 [1];  [2]
  1. Brown Laboratory and Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
  2. Brown Laboratory and Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States; School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Direct Catalytic Conversion of Biomass to Biofuels (C3Bio)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1388245
DOE Contract Number:
SC000997
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Sustainable Chemistry & Engineering; Journal Volume: 4; Journal Issue: 11; Related Information: C3Bio partners with Purdue University (lead); Argonne National Laboratory; National Renewable Energy Laboratory; Northeastern University; University of Tennessee
Country of Publication:
United States
Language:
English
Subject:
catalysis (homogeneous), catalysis (heterogeneous), biofuels (including algae and biomass), bio-inspired, materials and chemistry by design, synthesis (self-assembly), synthesis (scalable processing)

Citation Formats

Zhao, Shou, and Abu-Omar, Mahdi M. Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density. United States: N. p., 2016. Web. doi:10.1021/acssuschemeng.6b01446.
Zhao, Shou, & Abu-Omar, Mahdi M. Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density. United States. doi:10.1021/acssuschemeng.6b01446.
Zhao, Shou, and Abu-Omar, Mahdi M. 2016. "Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density". United States. doi:10.1021/acssuschemeng.6b01446.
@article{osti_1388245,
title = {Renewable Epoxy Networks Derived from Lignin-Based Monomers: Effect of Cross-Linking Density},
author = {Zhao, Shou and Abu-Omar, Mahdi M.},
abstractNote = {},
doi = {10.1021/acssuschemeng.6b01446},
journal = {ACS Sustainable Chemistry & Engineering},
number = 11,
volume = 4,
place = {United States},
year = 2016,
month = 7
}
  • Amorphous Ge{sub x}Si{sub x}Te{sub 1−2x} glasses are studied as a function of composition by a combination of experimental and theoretical methods, allowing for a full description of the network structure in relationship with physico-chemical properties. Calorimetric and thermal measurements reveal that such glasses display an anomalous behavior across a range of compositions x{sub c1}=7.5% and
  • Radiation cross-linking can result in a superior product or in deleterious effects. Incorporation of allyl methacrylate and allyl acrylate into polyethylene before Co/sup 60/ irradiation gives a more heat resistant, higher tensile strength material. Promising results from introductions of monomers into polypropylene and polyisobutylene are also noted. (D.C.W.)
  • Productive uses of lignin, the third most abundant natural polymer, have been sought for decades. One especially attractive possibility is that of developing value-added products including thermoplastics based on lignin. This possibility warrants special attention due to growth of the modern biofuel industries. However, the polydisperse molecular weight and hyper-branched structure of lignin has hindered the creation of high-performance biopolymers. Here, we report the preparation and characterization of novel lignin-based, partially carbon-neutral thermoplastics. We first altered the molecular weight of lignin, either by fractionation with methanol, or by formaldehyde crosslinking. A crosslinking of lignin increases the molecular weight, exhibiting Mnmore » = 31000 g/mol, whereas that of native lignin is 1840 g/mol. Tuning the molecular weight of lignin enabled successful preparation of novel lignin-derived thermoplastics, when coupled with telechelic polybutadiene soft-segments at proper feed ratios. Characteristic to thermoplastic rubbers, free-standing films of the resulting copolymers exhibit two-phase morphology and associated relaxations in the dynamic mechanical loss spectrum. To our knowledge this article is the first report to demonstrate phase immiscibility, melt-processibility, and biphasic morphology of soft and hard segments in a lignin-based copolymer for all feed ratios of two macromolecular components. The use of higher molecular weight lignin enhanced the resulting shear modulus due to efficient network formation of telechelic polybutadiene bridges. The storage modulus in the rubbery plateau region increased with increasing lignin content. The successful synthesis of novel lignin-based thermoplastics will open a new pathway to biomass utilization and will help conserve petrochemicals.« less