UV-Curable bismaleimides part I: Synthesis and photo-cure kinetics
| Autor: | Xiaofeng Ren, Mark D. Soucek, Hamideh Shokouhi Mehr, Yuanmei Cao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Organic Chemistry Kinetics 02 engineering and technology Carbon-13 NMR 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Gel permeation chromatography chemistry.chemical_compound Photopolymer Polymerization Polymer chemistry Materials Chemistry Proton NMR UV curing Organic chemistry 0210 nano-technology Maleimide |
| Zdroj: | Progress in Organic Coatings. 100:118-128 |
| ISSN: | 0300-9440 |
| Popis: | A new series of hydroxyl-substituted bismaleimide (BMI) oligomers were successfully prepared based on 2,2′-Bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA), 2,2-Bis(amino-4-hydroxyphenyl)hexafluoropropane (BIS-AP-AF), and different diamines. To develop BMI oligomers with improved UV-curing efficiency, the methacryloyl groups were incorporated into the oligomers using. The hydroxyl-substituted BMIs as well as the methacrylated BMIs oligomers were characterized by 1 HNMR, 13 C NMR, Fourier transform infrared (FT-IR), mass spectroscopy, and gel permeation chromatography (GPC). The photo-cure kinetics of the methacrylated BMI oligomers was investigated by real-time FT-IR, photo-DSC, and photo-rheometry. Although the presence of oxygen (O 2 ) delayed the polymerization of methacryloyl moieties, it did not affect the polymerization of the maleimide groups. In general, the overall conversion of these systems was reduced in the O 2 atmosphere compared to the nitrogen (N 2 ) atmosphere. In addition, the maleimide groups exhibited higher conversions than the methacrylic groups in both O 2 and N 2 atmospheres . |
| Databáze: | OpenAIRE |
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