Low-temperature and purification-free stereocontrolled ring-opening polymerisation of lactide in supercritical carbon dioxide
Low-temperature and purification-free stereocontrolled ring-opening polymerisation of lactide in supercritical carbon dioxide
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超临界二氧化碳中丙交酯的低温免纯化立体控制开环聚合
DOI:
10.1039/d0gc00352b
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发表时间:
2020
期刊:
影响因子:
9.8
通讯作者:
Bassett S
中科院分区:
文献类型:
--
作者:
Bassett S
A stereoselective, solvent-free ring-opening polymerisation (ROP) of lactide (LA) in supercritical carbon dioxide (scCO2) is reported for the first time. The key aim is to exploit scCO2 to lower the temperature of traditional melt polymerisations, lowering the energy requirement and leading to cleaner polymeric materials. We have utilised a zirconium amine-trisphenolate initiator-stereoselective catalyst [(iPrO)Zr(OPh(tBu)2-CH2)3N] to yield highly heterotactic poly(lactide) (PLA) homopolymer (Pr = 0.74–0.84) from rac-LA, demonstrating control of the PLA microstructure in scCO2. In addition, high monomer conversion (86–93%) was achieved in short reaction time (1 h), affording poly(lactide) with a very low degree of transesterification and narrow molecular weight distribution. Most importantly, all the reactions were performed at only 80 °C, almost 100 °C lower than the conventional melt process (typically performed at 130–180 °C), representing a very significant potential energy saving.
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影响因子:
9.8
作者:
I. Blakey;A. Yu;S. Howdle;A. Whittaker;K. Thurecht
通讯作者:
I. Blakey;A. Yu;S. Howdle;A. Whittaker;K. Thurecht
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
B. Grignard;J. Winter;P. Gerbaux;B. Gilbert;C. Jérôme;C. Detrembleur
通讯作者:
C. Detrembleur
影响因子:
9.8
作者:
Sherry Y. Lee;P. Valtchev;F. Dehghani
通讯作者:
F. Dehghani
DOI:
10.1016/j.supflu.2017.10.014
发表时间:
2018
期刊:
The Journal of Supercritical Fluids
影响因子:
--
作者:
Pepper K
通讯作者:
Pepper K
影响因子:
15
作者:
Tong, Rong;Cheng, Jianjun
通讯作者:
Cheng, Jianjun