Heterogeneity analysis of polymeric carboxylic acid functionality by selective derivatization followed by size exclusion chromatography

被引：9
作者：
Brooijmans, T. [1 ]
Okhuijsen, R. A. [1 ]
Oerlemans, G. M. M. [1 ]
Pirok, B. W. J. [2 ]
Schoenmakers, P. J. [2 ]
Peters, R. A. H. [1 ,2 ]
机构：
[1] Analyt Technol Ctr, DSM Coating Resins, Waalwijk, Netherlands
[2] Univ Amsterdam, Vant Hoff Inst Mol Sci HIMS, Amsterdam, Netherlands
来源：
ANALYTICA CHIMICA ACTA | 2019年 / 1072卷
关键词：
Derivatization; Size-exclusion chromatography; Waterborne polymers; Heterogeneity analysis; WATERBORNE POLYURETHANE; ELUTION CHROMATOGRAPHY; ALTERNATIVE APPROACH; GRADIENT; COPOLYMERS; SEPARATION; OIL;
D O I：
10.1016/j.aca.2019.04.051
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Waterborne polymers are increasingly applied in our society, replacing traditional solvent-borne coatings and thus reducing environmental impact of coatings. The majority of waterborne dispersions are stabilized by the incorporation of neutralizable carboxylic acid functionality. The characterization of synthetic waterborne polymer systems can be performed by a wide variety of chromatographic and spectroscopic techniques. However, none of these approaches is able to determine the acid functionality distribution over the molecular-weight distribution directly. In this research, an innovative approach is developed which enables this analysis. The approach is based on the specific and complete derivatization of carboxylic acid functionality with phenacylbromide. Size exclusion chromatography (SEC) analysis of the derivatized polymers is performed followed by ultraviolet-(UV) and refractive index (RI) detection, enabling the quantitative determination of the acid content per molecular weight fraction. The applicability of the developed protocol is shown for various polymer systems. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：87 / 94
页数：8
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