当前位置: X-MOL 学术Chemistryopen › 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.)
Chemical Recycling of End‐of‐Life Poly(lactide) via Zinc‐Catalyzed Depolymerization and Polymerization
ChemistryOpen ( IF 2.3 ) Pub Date : 2020-11-02 , DOI: 10.1002/open.202000243
Even Cheung 1 , Christoph Alberti 1 , Stephan Enthaler 1
Affiliation  

The chemical recycling of poly(lactide) was investigated based on depolymerization and polymerization processes. Using methanol as depolymerization reagent and zinc salts as catalyst, poly(lactide) was depolymerized to methyl lactate applying microwave heating. An excellent performance was observed for zinc(II) acetate with turnover frequencies of up to 45000 h−1. In a second step the monomer methyl lactate was converted to (pre)poly(lactide) in the presence of catalytic amounts of zinc salts. Here zinc(II) triflate revealed excellent performance for the polymerization process (yield: 91 %, Mn ∼8970 g/mol). Moreover, the (pre)poly(lactide) was depolymerized to lactide, the industrial relevant molecule for accessing high molecular weight poly(lactide), using zinc(II) acetate as catalyst.

中文翻译:

锌催化解聚和聚合反应对报废聚丙交酯进行化学回收

基于解聚和聚合过程,研究了聚丙交酯的化学回收利用。使用甲醇作为解聚试剂,并使用锌盐作为催化剂,通过微波加热将聚丙交酯解聚为乳酸甲酯。对于乙酸锌(II),观察到优异的性能,其周转频率高达45000h -1。在第二步骤中,在催化量的锌盐的存在下,将单体乳酸甲酯转化为(预)聚(丙交酯)。这里锌(II),三氟甲磺酸揭示了在聚合过程优异的性能(收率:91%,M Ñ约8970克/摩尔)。此外,使用乙酸锌(II)将(预)聚(丙交酯)解聚为丙交酯,丙交酯是用于获得高分子量聚(丙交酯)的工业相关分子。
更新日期:2020-12-01
down
wechat
bug