当前位置: X-MOL 学术ACS Sustain. Chem. Eng. › 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.)
Metal-Free Approach for a One-Pot Construction of Biodegradable Block Copolymers from Epoxides, Phthalic Anhydride, and CO2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-20 , DOI: 10.1021/acssuschemeng.0c07283
Shuxian Ye 1 , Wenjing Wang 1 , Jiaxin Liang 1 , Shuanjin Wang 1 , Min Xiao 1 , Yuezhong Meng 1
Affiliation  

Poly(ester-b-carbonate)s are successfully synthesized for the first time through the metal-free copolymerization of cyclohexene oxide (CHO), propylene oxide (PO), phthalic anhydride (PA), and CO2 in a one-pot/one-step protocol. Catalyzed by triethyl borane (TEB) and bis(triphenylphosphine)iminium chloride (PPNCl) Lewis pair, the diblock and triblock copolymers with little tapering are synthesized from the initiation of PPNCl and phthalic acid, respectively. Copolymers with a high molecular weight of up to 50 kDa can be readily obtained under mild conditions. By changing the content of chain components in quadripolymers, glass transition temperature (Tg) values are adjusted between 86 and 115 °C. Moreover, the products appear extremely transparent with transparency of above 85% in the range of 600–1000 nm. This work first focuses on the synthesis of quadripolymers with high Tgs (>90 °C) and tensile strength (up to 54.8 MPa), which have similar thermal, mechanical properties, and transparency as those of commercial polystyrene and thus may be candidate green materials to replace the nondegradable polystyrene in extensive application areas.

中文翻译:

从环氧,邻苯二甲酸酐和CO 2一锅构建可生物降解的嵌段共聚物的无金属方法

聚(酯b-碳酸酯)是通过单罐/环氧化环氧己烯(CHO),环氧丙烷(PO),邻苯二甲酸酐(PA)和CO 2的无金属共聚首次成功合成的。一站式协议。在三乙基硼烷(TEB)和双(三苯基膦)氯化亚胺(PPNCl)路易斯对的催化下,由PPNCl和邻苯二甲酸的引发分别合成了逐渐变细的二嵌段和三嵌段共聚物。在温和条件下可以轻松获得分子量高达50 kDa的共聚物。通过改变四元共聚物中链组分的含量,玻璃化转变温度(T g)值在86至115°C之间调整。此外,产品看起来非常透明,在600–1000 nm范围内的透明度超过85%。这项工作首先着重于合成具有高T g s(> 90°C)和拉伸强度(高达54.8 MPa)的四元共聚物,这些四元共聚物的热,机械性能和透明度与市售聚苯乙烯相似,因此可能是候选材料。在广泛的应用领域中用绿色材料代替不可降解的聚苯乙烯。
更新日期:2020-12-07
down
wechat
bug