Issue 5, 2011
From the journal:

Polymer Chemistry

Poly(urethane/malonamide) dendritic structures featuring blocked/deblocked isocyanate units

Yung-Chung Chen,a   Wen-Yi Wu,a   Tzong-Yuan Juang,*b   Shenghong A. Dai,a   Wen-Chiung Su,c   Ying-Ling Liu,d   Rong-Ho Leea  and  Ru-Jong Jeng*a  

* Corresponding authors

a Department of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
E-mail: rjjeng@nchu.edu.tw
Fax: +886-4-22854734
Tel: +886-4-22852581

b Department of Applied Chemistry, National Chiayi University, Chiayi, Taiwan
E-mail: tyjuang@mail.ncyu.edu.tw
Fax: +886-5-2717901
Tel: +886-5-2717899

c Chung-Shan Institute of Science and Technology, Lungtan, Taiwan

d Department of Chemical Engineering, Chung Yuan Christian University, Chung Li, Taiwan

Abstract

We have used 4-isocyanato-4′-(3,3-dimethyl-2,4-dioxoazetidino)diphenylmethane and diethylenetriamine as building blocks to synthesize novel poly(urethane/malonamide) dendrons possessing terminal methyl ethyl ketoxime (MEKO) units (blocked isocyanategroups). Heating the MEKO-containing dendrons regenerated the terminal isocyanategroups. Subsequently, the regenerated isocyanategroups would react with any compound with active hydrogens. In one example, the dendrons with the deblocked isocyanates further reacted with stearyl alcohol (C18-OH) to form the corresponding dendrons presenting C18 moieties. This deblocking strategy allows replacement of reactive exterior groups with desired functionality for the construction of dendritic macromolecules.

Graphical abstract: Poly(urethane/malonamide) dendritic structures featuring blocked/deblocked isocyanate units

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Article information

DOI
https://doi.org/10.1039/C0PY00358A
Article type
Paper
Submitted
01 Nov 2010
Accepted
22 Jan 2011
First published
03 Feb 2011

Polym. Chem., 2011,2, 1139-1145

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Poly(urethane/malonamide) dendritic structures featuring blocked/deblocked isocyanate units

Y. Chen, W. Wu, T. Juang, S. A. Dai, W. Su, Y. Liu, R. Lee and R. Jeng, Polym. Chem., 2011, 2, 1139 DOI: 10.1039/C0PY00358A

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