Copolymers incorporated with β-substituted acrylate synthesized by organo-catalyzed group-transfer polymerization

Copolymers incorporated with β-substituted acrylate synthesized by organo-catalyzed group-transfer polymerization
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通过有机催化基团转移聚合合成的掺有 β-取代丙烯酸酯的共聚物

DOI:
10.1038/s41428-021-00493-z
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发表时间:
2021
期刊:
影响因子:
2.8
通讯作者:
Abe Hideki
Abe Hideki
中科院分区:
化学3区
文献类型:
--
作者:
Imada Motosuke;Takenaka Yasumasa;Tsuge Takeharu;Abe Hideki

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与β-取代的丙烯酸酯如巴豆酸烷基酯(例如,以硅基刘易斯酸为催化剂,通过基团转移聚合(GTP)合成了巴豆酸甲酯(MC)、巴豆酸乙酯(EC)、巴豆酸异丙酯(iPC)、巴豆酸正丁酯(nBC)和肉桂酸甲酯(MCin)。除了β-取代的丙烯酸酯之外,α-取代的丙烯酸酯(例如,甲基丙烯酸甲酯(MMA)和甲基丙烯酸正丁酯(nBMA))作为共聚单体。质子核磁共振(1H NMR)光谱和基质辅助激光解吸/电离飞行时间质谱(MALDI-TOF-MS)表征所获得的共聚物表明,每个单体组分被充分纳入。通过动态力学分析(DMA)研究了所得共聚物的热稳定性,表明通过选择最佳共聚单体,共聚物的玻璃化转变温度(Tg)可以在相对较高的温度范围内广泛变化。更具体地,聚(MC-无规-EC)(MC/EC摩尔比= 50/50)、聚(MC-无规-nBC)(MC/nBC摩尔比= 50/50)、聚(MC-无规-MCin)(MC/MCin摩尔比= 54/46)和聚(nBC-无规-MCin)(nBC/MCin摩尔比= 56/44)的Tg值分别为173 ° C、130 ° C、216 ° C和167 °C。
Various copolymers incorporated with β-substituted acrylates, such as alkyl crotonates (e.g., methyl crotonate (MC), ethyl crotonate (EC), isopropyl crotonate (iPC), andn-butyl crotonate (nBC)) and methyl cinnamate (MCin), were synthesized by group-transfer polymerization (GTP) using a silicon-based Lewis acid catalyst. In addition to β-substituted acrylates, α-substituted acrylates (e.g., methyl methacrylate (MMA) andn-butyl methacrylate (nBMA)) were examined as comonomers. Proton nuclear magnetic resonance (1H NMR) spectroscopy and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) characterizations of the obtained copolymers revealed that each monomer component was incorporated sufficiently. The thermal stabilities of the resulting copolymers were investigated by dynamic mechanical analysis (DMA), indicating that the glass-transition temperature (Tg) of the copolymers can be widely varied over a relatively high-temperature range by selecting the optimal comonomer. More specifically, theTgvalues of poly(MC-random-EC) (MC/EC molar ratio = 50/50), poly(MC-random-nBC) (MC/nBC molar ratio = 50/50), poly(MC-random-MCin) (MC/MCin molar ratio = 54/46), and poly(nBC-random-MCin) (nBC/MCin molar ratio = 56/44) were 173, 130, 216, and 167 °C, respectively.
DOI: 10.1295/polymj.37.578
发表时间: 2005-08
期刊: Polymer Journal
影响因子: 2.8
作者:
K. Ute;Toshiyuki Tarao;T. Kitayama
通讯作者: K. Ute;Toshiyuki Tarao;T. Kitayama
DOI: 10.1021/ma902006d
发表时间: 2009-10
期刊: Macromolecules
影响因子: 5.5
作者:
R. Kakuchi;K. Chiba;Keita Fuchise;R. Sakai;T. Satoh;T. Kakuchi
通讯作者: R. Kakuchi;K. Chiba;Keita Fuchise;R. Sakai;T. Satoh;T. Kakuchi
DOI: 10.1038/s42004-019-0215-3
发表时间: 2019-09-16
影响因子: 5.9
作者:
Imada, Motosuke;Takenaka, Yasumasa;Abe, Hideki
通讯作者: Abe, Hideki
DOI: 10.1039/jr9370001784
发表时间: 1937
期刊: Journal of The Chemical Society (resumed)
影响因子: --
作者:
R. Sapiro;R. Linstead;D. Newitt
通讯作者: D. Newitt
使用有机超强酸催化剂进行各种巴豆酸烷基酯的基团转移聚合
DOI: --
发表时间: 2019
期刊:
影响因子: --
作者:
Yasumasa Takenaka;Hideki Abe
通讯作者: Hideki Abe