当前位置：
X-MOL 学术
›
Macromolecules
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Unprecedented Double Insertion of Cyclohexene Oxide in Ring-Opening Copolymerization with Cyclic Anhydrides Catalyzed by a Tin(II) Alkoxide Complex
Macromolecules ( IF 5.1 ) Pub Date : 2020-10-14 , DOI: 10.1021/acs.macromol.0c01738 Thasanaporn Ungpittagul 1 , Tiphanan Jaenjai 1 , Thantip Roongcharoen 2 , Supawadee Namuangruk 2 , Khamphee Phomphrai 1
Macromolecules ( IF 5.1 ) Pub Date : 2020-10-14 , DOI: 10.1021/acs.macromol.0c01738 Thasanaporn Ungpittagul 1 , Tiphanan Jaenjai 1 , Thantip Roongcharoen 2 , Supawadee Namuangruk 2 , Khamphee Phomphrai 1
Affiliation
|
Typical ring-opening copolymerization (ROCOP) of cyclic anhydrides (A) and epoxides (B) catalyzed by most metal complexes underwent strict alternating monomer insertions giving (AB)n polyesters. In this contribution, a novel polyester containing (ABB)n polymer sequences was prepared via the ROCOP of cyclic anhydrides and cyclohexene oxide (CHO) using a tin(II) alkoxide complex. Quantum calculations revealed that the preference for the (ABB)n sequence was enhanced by the energetic preference of the second CHO insertion. The copolymer with (ABB)n content as high as 70% was obtained from the ROCOP of succinic anhydride and CHO with an enhanced Tg of 65 °C (>20 °C higher than the (AB)n analogue). The ROCOP of maleic anhydride and CHO also gave a copolymer with high (ABB)n content at 48% and improved Tg of 89 °C (38 °C higher). The improved thermal properties were a result of the more rigid (ABB)n polymer backbone compared with conventional alternating (AB)n copolymer analogues. In addition, terpolymerization with ε-caprolactone (ε-CL) was achieved by sequential addition of ε-CL affording the block copolymer with the (ABB)n backbone.
中文翻译：
锡（II）醇配合物催化的环己烯与环酐的开环共聚中前所未有的环己烯氧化物的两次插入
大多数金属络合物催化的典型的环酐（A）和环氧化物（B）的典型开环共聚（ROCOP）经历严格的交替单体插入，得到（AB）n聚酯。在这一贡献中，使用锡（II）醇盐配合物通过环酸酐和环己烯氧化物（CHO）的ROCOP制备了一种含（ABB）n聚合物序列的新型聚酯。量子计算表明，第二次CHO插入的能量偏好增强了（ABB）n序列的偏好。由琥珀酸酐和CHO的ROCOP得到的（ABB）n含量高达70％的共聚物具有增强的T g65°C（比（AB）n类似物高20°C ）。马来酸酐和CHO的ROCOP还得到了一种共聚物（ABB），n含量为48％，T g改进为89°C（高38°C）。与常规交替（AB）n共聚物类似物相比，刚性更高（ABB）n聚合物主链的结果是改善的热性能。另外，通过顺序添加ε-CL获得了具有（ABB）n主链的嵌段共聚物，从而与ε-己内酯（ε-CL）进行三元聚合。
更新日期：2020-11-25
中文翻译：
锡（II）醇配合物催化的环己烯与环酐的开环共聚中前所未有的环己烯氧化物的两次插入
大多数金属络合物催化的典型的环酐（A）和环氧化物（B）的典型开环共聚（ROCOP）经历严格的交替单体插入，得到（AB）n聚酯。在这一贡献中，使用锡（II）醇盐配合物通过环酸酐和环己烯氧化物（CHO）的ROCOP制备了一种含（ABB）n聚合物序列的新型聚酯。量子计算表明，第二次CHO插入的能量偏好增强了（ABB）n序列的偏好。由琥珀酸酐和CHO的ROCOP得到的（ABB）n含量高达70％的共聚物具有增强的T g65°C（比（AB）n类似物高20°C ）。马来酸酐和CHO的ROCOP还得到了一种共聚物（ABB），n含量为48％，T g改进为89°C（高38°C）。与常规交替（AB）n共聚物类似物相比，刚性更高（ABB）n聚合物主链的结果是改善的热性能。另外，通过顺序添加ε-CL获得了具有（ABB）n主链的嵌段共聚物，从而与ε-己内酯（ε-CL）进行三元聚合。
京公网安备 11010802027423号