A sdudy on the curing processes of the mixture of ureaformaldehyde resin and polydiphenylmethane diisocyanate by DSC

Hao Bingje Liu Zhengtian

doi:10.19455/j.mcgy.1993.02.001

Views : 0 下载量: 227 CSCD: 25

PDF
Export
Share
Collection
Album

A sdudy on the curing processes of the mixture of ureaformaldehyde resin and polydiphenylmethane diisocyanate by DSC
1. The Research Inst. of Wood Industry
2. 北京林业大学,北京,100091
3. ,北京,100083
Issue 2, Pages: 2-6(1993)
DOI： 10.19455/j.mcgy.1993.02.001

扫描看全文

[1]郝丙业,刘正添.应用DSC研究脲醛树脂胶和异氰酸酯胶混合液的固化过程[J].木材工业,1993(02):2-6.

Hao Bingje Liu Zhengtian. A sdudy on the curing processes of the mixture of ureaformaldehyde resin and polydiphenylmethane diisocyanate by DSC. [J]. China Wood Industry (2):2-6(1993)
[1]郝丙业,刘正添.应用DSC研究脲醛树脂胶和异氰酸酯胶混合液的固化过程[J].木材工业,1993(02):2-6. DOI： 10.19455/j.mcgy.1993.02.001.

Hao Bingje Liu Zhengtian. A sdudy on the curing processes of the mixture of ureaformaldehyde resin and polydiphenylmethane diisocyanate by DSC. [J]. China Wood Industry (2):2-6(1993) DOI： 10.19455/j.mcgy.1993.02.001.

摘要

本文以差热扫描量热法（DSC）分别研究了脲醛（UF）胶、聚异氰酸酯（PMDI）胶以及它们的混合液的加热固化过程。结果表明,PMDI和UF在105～110℃发生放热固化反应。此外,PMDI与水在120～125℃发生剧烈的放热反应。PMDI的反应活性受介质酸度影响较大,介质pH值越低,PMDI的反应性越小,或几乎被抑制。

Abstract

The curing processes of urea-formaldehyde(UF) resin, polydiphenylmethane diisocyanate (PMDI) and their mixtures were examined respectively by differential scanning calorimetry (DSC). Results showed that the reactions between the UF resin and PMDI occur at the temperature of 105～110℃. PMDI intensely reacts on water when the temperature reaches 120～125℃. However, the reaction activeties of PMDI is effected by the acidities of the medium. The lower the pH value of medium, the worse the reactiveness of PMDI.

关键词

差热分析脲醛树脂聚异氰酸酯

Keywords

Differential scanning calorimetry (DSC)Urea—formaldehyde resinPolydiphenylmethane diisocyanate (PMDI)

references

Alert me when the article has been cited

提交

暂无数据