材料科学
热塑性塑料
木质素
复合材料
共聚酯
韧性
动态力学分析
热塑性弹性体
相(物质)
形态学(生物学)
共聚物
聚合物
化学工程
聚酯纤维
有机化学
化学
工程类
生物
遗传学
作者
Nihal Kanbargi,Monojoy Goswami,Liam Collins,Logan T. Kearney,Christopher C. Bowland,Keon-Hee Kim,Kalavathy Rajan,Nicole Labbé,Amit K. Naskar
出处
期刊:ACS applied polymer materials
[American Chemical Society]
日期:2021-05-13
卷期号:3 (6): 2911-2920
被引量:9
标识
DOI:10.1021/acsapm.0c01387
摘要
We report synthesis of a high-strength renewable phenolic composition with linear large deformation strain without a thermoplastic-like yielding while retaining thermal processability. Small molecule carboxylic acid derivatives with varying molecular architectures act as esterifying crosslinkers in an equal mass mixture of lignin and acrylonitrile–butadiene copolymers in a highly scalable, solvent-free process. These “inverse thermoplastic vulcanizates” (iTPVs)─unique in their approach of crosslinking the rigid lignin phase rather than the soft phase─exhibit ordered self-assembly, tunable nanoscale morphology, and processability. The first of its kind iTPV compositions exhibit engineering stress–strain curves with two- to sixfold linear extensibility, a twofold rise in strength, and an order of magnitude enhanced modulus compared to a simple lignin-rubber blend. Viscoelastic properties correlate well with crosslinker architecture and the resulting morphology, allowing competing properties of toughness and stiffness to be tuned. This research finds a path for identifying the potential of lignin as a sustainable feedstock.
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