Effect of a novel environmentally friendly additive of polyaspartic acid on the properties of urea formaldehyde resins/montmorillonite

被引：6

作者：

Zhou, Yang ^{[1
]}

Yang, Miao ^{[1
]}

Zheng, Youmiao ^{[2
]}

Tong, Dongshen ^{[1
]}

Zhou, Chunhui ^{[1
]}

Yu, Weihua ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Chem Engn, Discipline Ind Catalysis, State Key Lab Breeding Base Green Chem Synth Tech, Hangzhou 310032, Zhejiang, Peoples R China

[2] China Natl Bamboo Res Ctr, Hangzhou 310012, Zhejiang, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2019年 / 136卷 / 41期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

curing time; free formaldehyde; polyaspartic acid; urea-formaldehyde resin; viscosity; HYDROLYTIC STABILITY; THERMAL-STABILITY; GAMMA-IRRADIATION; CURING MECHANISM; RESIN ADHESIVES; MONTMORILLONITE; PERFORMANCE; MORPHOLOGY; BEHAVIOR;

D O I：

10.1002/app.48038

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polyaspartic acid (PASP) is a biodegradable green material with carboxyl groups (-COOH) and amido groups (-CO-NH-). In the article, a novel urea-formaldehyde (UF) resin modified by PASP and Ca-montmorillonite (Ca-Mt) was prepared by the alkaline-acid-alkaline method. The synthesized materials were characterized by X-ray diffraction, Fourier transform-infrared spectroscopy, thermal analysis (TG-DTG), and scanning electron microscopy. The effects of viscosity, curing time, and free formaldehyde were investigated. The results showed that the layered structure of Ca-Mt was exfoliated and dispersed in the bulk of UF. The thermal stability of the modified UF was much better than that of pure UF resin. The percentage of free formaldehyde was declined from 26 to 18%. Meanwhile, the UF composites showed the short curing time and the optimum viscosity. Finally, a synthetic process of UF modified by PASP and Ca-Mt and a possible mechanism for immobilizing the free formaldehyde were suggested. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48038.

引用

页数：7

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