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Effect of Methoxy Substituent Position on Thermal Properties and Solvent Resistance of Lignin-Inspired Poly(dimethoxyphenyl methacrylate)s
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-07-17 00:00:00 , DOI: 10.1021/acsmacrolett.7b00381 Shu Wang , Alexander W. Bassett 1 , George V. Wieber , Joseph F. Stanzione 1 , Thomas H. Epps
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-07-17 00:00:00 , DOI: 10.1021/acsmacrolett.7b00381 Shu Wang , Alexander W. Bassett 1 , George V. Wieber , Joseph F. Stanzione 1 , Thomas H. Epps
Affiliation
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The macromolecular properties, including the glass transition temperature (Tg) and solvent resistance, of lignin-inspired poly(dimethoxyphenyl methacrylate)s were controlled by varying the position of the dimethoxy substituents in the constituent monomers. For the four dimethoxyphenyl methacrylate isomers investigated, with substituents at different locations on the phenyl ring (i.e., 3,5-; 2,3-; 2,4-; and 2,6-), the Tg’s of the resulting polymers spanned a wide range from less than 100 °C to greater than 200 °C. Rotational freedom and segmental interactions were responsible for the varying Tg’s. The polymers were thermally stable in air up to ∼300 °C, providing a suitable thermal processing window. The poly(dimethoxyphenol methacrylate) homopolymers also exhibited remarkably different solvent resistances to organic solvents, including tetrahydrofuran and chloroform. Furthermore, by copolymerizing various dimethoxyphenyl methacrylate isomers, the Tg and solvent resistance of the resulting macromolecules could be tuned independently to gain enhanced control over materials design. The ability to manipulate properties through isomer composition in this lignin-inspired system may facilitate usage in applications such as components in coatings, thermoplastics, thermoplastic elastomers, and other materials.
中文翻译：
甲氧基取代基位置对木质素启发的聚甲基丙烯酸二甲氧基苯基酯的热性能和耐溶剂性的影响
通过改变组成单体中二甲氧基取代基的位置来控制木质素启发的聚（甲基丙烯酸二甲氧基苯基酯）的大分子性质，包括玻璃化转变温度（T g）和耐溶剂性。对于四分甲基丙烯酸二甲氧基苯基异构体的调查，取代基在苯环上的不同位置（即，3,5-; 2,3-; 2,4-;和2,6-），则Ť克由此而来的聚合物的温度范围从小于100°C到大于200°C。旋转自由度和节段相互作用是导致变化的T g的原因。的。聚合物在高达约300°C的空气中是热稳定的，从而提供了合适的热处理窗口。聚（二甲氧基苯酚甲基丙烯酸甲酯）均聚物对有机溶剂包括四氢呋喃和氯仿的耐溶剂性也显着不同。此外，通过共聚各种甲基丙烯酸二甲氧基苯基酯异构体，可以独立地调节所得大分子的T g和耐溶剂性，以增强对材料设计的控制。在这种受木质素启发的系统中，通过异构体组成控制性能的能力可能会促进其在涂料，热塑性塑料，热塑性弹性体和其他材料中的应用。
更新日期：2017-07-17
中文翻译：
甲氧基取代基位置对木质素启发的聚甲基丙烯酸二甲氧基苯基酯的热性能和耐溶剂性的影响
通过改变组成单体中二甲氧基取代基的位置来控制木质素启发的聚（甲基丙烯酸二甲氧基苯基酯）的大分子性质，包括玻璃化转变温度（T g）和耐溶剂性。对于四分甲基丙烯酸二甲氧基苯基异构体的调查，取代基在苯环上的不同位置（即，3,5-; 2,3-; 2,4-;和2,6-），则Ť克由此而来的聚合物的温度范围从小于100°C到大于200°C。旋转自由度和节段相互作用是导致变化的T g的原因。的。聚合物在高达约300°C的空气中是热稳定的，从而提供了合适的热处理窗口。聚（二甲氧基苯酚甲基丙烯酸甲酯）均聚物对有机溶剂包括四氢呋喃和氯仿的耐溶剂性也显着不同。此外，通过共聚各种甲基丙烯酸二甲氧基苯基酯异构体，可以独立地调节所得大分子的T g和耐溶剂性，以增强对材料设计的控制。在这种受木质素启发的系统中，通过异构体组成控制性能的能力可能会促进其在涂料，热塑性塑料，热塑性弹性体和其他材料中的应用。
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