Controlled Radical Polymerization of Crude Lignin Bio-oil Containing Multihydroxyl Molecules for Methacrylate Polymers and the Potential Applications
Controlled Radical Polymerization of Crude Lignin Bio-oil Containing Multihydroxyl Molecules for Methacrylate Polymers and the Potential Applications
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DOI：
10.1021/acssuschemeng.9b01597
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发表时间：
2019-04
影响因子：
8.4
通讯作者：
Wangda Qu;Yuerui Huang;Yixin Luo;S. Kalluru;Eric W. Cochran;Michael J. Forrester;Xianglan Bai
中科院分区：
文献类型：
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作者：
Wangda Qu;Yuerui Huang;Yixin Luo;S. Kalluru;Eric W. Cochran;Michael J. Forrester;Xianglan Bai
以红橡木木质素生物油为原料，合成了具有不同热弹性和粘弹性的甲基丙烯酸酯聚合物。该生物油又称热解木质素（PL），由多种酚类单体和低聚物组成，羟基平均含量为3.04 mol/mol。先将聚乳酸与不同量的甲基丙烯酰氯和乙酰氯酯化生成聚乳酸甲基丙烯酸酯，然后进行可逆加成-破碎链转移聚合。全甲基丙烯酸化聚乳酸的聚合引起胶凝，产生交联聚合物。另一方面，在部分甲基丙烯酸化PL的聚合过程中，凝胶点被抑制，从而得到玻璃化转变温度（Tg）为161℃，热分解温度（Td）为241℃的热塑性聚合物。相比之下，通过部分甲基丙烯酸基化和随后的乙酰化对PL进行功能化，得到Tg为130℃，Td为250℃的聚合物。不像其他生物基甲基丙烯酸酯聚合物…
In this work, methacrylate polymers with different thermal and viscoelastic properties were synthesized from red oak lignin bio-oil. The bio-oil, also called pyrolytic lignin (PL), consisted of various phenolic monomers and oligomers with average hydroxyl content of 3.04 mol/mol. The PL was first esterified with different amounts of methacryloyl chloride and acetyl chloride to form PL methacrylates and then subjected to reversible addition–fragmentation chain transfer polymerization. Polymerization of fully methacrylated PL caused gelation to yield a cross-linked polymer. On the other hand, gel-point suppression occurred in the polymerization of partially methacrylated PL to yield a thermoplastic polymer with glass transition temperature (Tg) of 161 °C and thermal decomposition temperature (Td) of 241 °C. In comparison, the functionalization of PL by partial methacrylation and subsequent acetylation resulted in a polymer with Tg of 130 °C and Td of 250 °C. Unlike other biobased methacrylate polymers that ...