SHEAR-THICKENING FEATURE OF CONCENTRATED AQUEOUS SOLUTIONS OF WATER-SOLUBLE POLYESTERS

YING Zongrong; LI Ruixia; WU Dacheng

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SHEAR-THICKENING FEATURE OF CONCENTRATED AQUEOUS SOLUTIONS OF WATER-SOLUBLE POLYESTERS

Research Article | 更新时间：2021-03-19

- SHEAR-THICKENING FEATURE OF CONCENTRATED AQUEOUS SOLUTIONS OF WATER-SOLUBLE POLYESTERS
- Acta Polymerica Sinica Issue 4, Pages: 448-451(2000)
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- Published：20 August 2000，
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YING Zongrong, LI Ruixia, WU Dacheng. SHEAR-THICKENING FEATURE OF CONCENTRATED AQUEOUS SOLUTIONS OF WATER-SOLUBLE POLYESTERS. [J]. Acta Polymerica Sinica (4):448-451(2000)
DOI：

YING Zongrong, LI Ruixia, WU Dacheng. SHEAR-THICKENING FEATURE OF CONCENTRATED AQUEOUS SOLUTIONS OF WATER-SOLUBLE POLYESTERS. [J]. Acta Polymerica Sinica (4):448-451(2000) DOI：

摘要

研究了由对苯二甲酸二甲酯、间苯二甲酸、间苯二甲酸二甲酯 5-磺酸钠与乙二醇等共缩聚合成的PET型水溶性聚酯浓水溶液 (质量浓度3.0%)的流变特性 .研究表明

溶液的表观粘度随切变速率的变化规律呈现一定的切力增稠特征

流动指数范围为1.04～1.20之间 ;其lgηa-τ曲线呈线性

零切粘度值为 15.8～3.5 2cP

随分子量、分子结构和温度而异

其中分子链中间苯二甲酸乙二醇酯 5-磺酸钠链节含量对溶液粘度影响较大 ;粘流活化能因分子结构和切变速率而变

其值范围为12.0～23.9kJ/mol.

Abstract

The rheological properties of concentrated aqueous solutions of water-soluble polyesters prepared by copolycondesation of dimethyl terephthalate

iso-phthalic acid

dimethyl 5-sodiosulfoisophthalate with ethylene glycol

have been investigated.The concentrated aqueous solutions (30%) of water-soluble polyesters show a weak shear-thickening feature with flow index from 1.04 to 1.20.Their lgηa-τcurves show a linear feature

and the zero shear viscosity varies with molecular structure

molecular weight and temperature.Specially

the content of bis(2-hydroxyethyl)5-sodiosulfoisophthalate in molecular chains has a large effect on the viscosity of solutions.Ther viscosity-flow activation energy varies with molecular structure of the polymer and the shear rate in a range of 12.0-23.9kJ/mol.

关键词

水溶性聚酯浓溶液切力增稠零切粘度粘流活化能

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