Modification of Oligolactic Acid with Tetracarboxylic p-tert-Butylthiacalix[4] arene Derivatives: Effect of Macrocyclic Fragment Configuration on Aggregation and Thermal Properties of Copolyesters

被引：15

作者：

Gorbachuk, Vladimir V. ^{[1
]}

Mostovaya, Olga A. ^{[1
]}

Evtugyn, Vladimir G. ^{[2
]}

Osin, Yuri N. ^{[2
]}

Rizvanov, Ildar Kh. ^{[3
]}

Gerasimov, Alexander V. ^{[1
]}

Stoikov, Ivan I. ^{[1
]}

机构：

[1] Kazan Fed Univ, AM Butlerov Chem Inst, Kazan 420008, Russia

[2] Kazan Fed Univ, Interdisciplinary Ctr Analyt Microscopy, Kazan 420008, Russia

[3] RAS, AE Arbuzov Inst Organ & Phys Chem KSC, Kazan 420088, Russia

来源：

MACROHETEROCYCLES | 2017年 / 10卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

Thiacalix[4] arene; oligolactic acid; copolyesters; self-aggregation; thermostability; P-TERT-BUTYL; MOLECULAR RECOGNITION; LOWER RIM; STEREOISOMERS; COPOLYMERS; RELEASE; WEIGHT; SMART;

D O I：

10.6060/mhc170513s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel approach to modification of oligolactic acid with three stereoisomers (cone, partial cone, 1,3-alternate) of p-tert-butylthiacalix[4] arene carboxylate derivatives has been developed. Using non-covalent self-assembly in dichloromethane, submicron spherical particles with 701 (cone), 362 (partial cone), 371 nm (1,3-alternate) size were obtained. Nanoprecipitation in the acetone-water mixture allowed forming particles of lower diameter, i.e. 191 (cone), 155 (partial cone) and 98 nm (1,3-alternate). It was shown by simultaneous thermogravimetry and differential scanning calorimetry that introduction of the macrocyclic fragments into the oligolactic acid increased its thermal stability. The temperature corresponding to the start of thermal decomposition was shifted from 246 degrees C (non-modified oligolactic acid) to 263 degrees C (that modified with macrocycles in partial cone and cone conformations) and 278 degrees C (derivative of 1,3-alternate).

引用

页码：174 / 181

页数：8

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