Davletbaeva Ilsiya M, Alentiev Alexander Yu, Faizulina Zulfiya Z, Zaripov Ilnaz I, Nikiforov Roman Yu, Parfenov Victor V, Arkhipov Alexander V
Department of Technology of Synthetic Rubber, Kazan National Research Technological University, 68 Karl Marx str, 420015 Kazan, Russia.
A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, 29 Leninsky Prospect, 119991 Moscow, Russia.
Polymers (Basel). 2021 Oct 17;13(20):3579. doi: 10.3390/polym13203579.
Organosubstituted silica derivatives were synthesized and investigated as modifiers of block copolymers based on macroinitiator and 2,4-toluene diisocyanate. A peculiarity of the modified block copolymers is the existence in their structure of coplanar rigid polyisocyanate blocks of acetal nature (O-polyisocyanates). Organosubstituted silica derivatives have a non-additive effect on high-temperature relaxation and α-transitions of modified polymers and exhibit the ability to influence the supramolecular structure of block copolymers. The use of the developed modifiers leads to a change in the gas transport properties of block copolymers. The increase of the permeability coefficients is due to the increase of the diffusion coefficients. At the same time, the gas solubility coefficients do not change. An increase in the ideal selectivity for a number of gas pairs is observed. An increase in the selectivity for the CO/N gas pair (from 25 to 39) by 1.5 times demonstrates the promising use of this material for flue gases separation.
合成了有机取代的二氧化硅衍生物，并将其作为基于大分子引发剂和2,4-甲苯二异氰酸酯的嵌段共聚物的改性剂进行了研究。改性嵌段共聚物的一个特点是其结构中存在具有缩醛性质的共面刚性多异氰酸酯嵌段（O-多异氰酸酯）。有机取代的二氧化硅衍生物对改性聚合物的高温松弛和α转变具有非加和效应，并表现出影响嵌段共聚物超分子结构的能力。使用所开发的改性剂会导致嵌段共聚物的气体传输性能发生变化。渗透系数的增加是由于扩散系数的增加。同时，气体溶解度系数不变。观察到一些气体对的理想选择性增加。CO/N气体对的选择性增加（从25提高到39）1.5倍，表明这种材料在烟道气分离方面具有广阔的应用前景。
