| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Estadual Campinas, Inst Chem, UNICAMP, Campinas, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | Journal of Applied Polymer Science; v. 137, n. 41 MAR 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Research of polynaphthalimides (PNI) frequently reports difficulties over synthesis and processing due to insolubility. In this work, we present a novel comprehensive study on the effects of time, temperature and catalyst on the synthesis of soluble PNI precursors-polyamic acids (PAAs)-, as well as a novel synthetic procedure for the synthesis of PNI using mild conditions. Kinetic studies concerning the monomer conversion and the degree of premature imidization were performed through proton nuclear magnetic resonance and gel permeation chromatography for temperature ranging from 25 to 100 degrees C. High temperatures (above 60 degrees C) entail extensive premature imidization and insolubility. The use of triethylamine also catalyzes imidization. At the optimal condition, soluble PAA precursors for PNI of 72 kDa could be obtained at 40 degrees C in N-methyl-2-pyrrolidone solution (30 wt%) after 5 hr polymerization. (AU) | |
| FAPESP's process: | 15/25406-5 - Organizing matter: colloids formed by association of surfactants, polymers and nanoparticles |
| Grantee: | Watson Loh |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/22724-9 - Synthesis and characterization of polinaphthalimides copolymers and their reduced graphene oxide composites |
| Grantee: | Heloisa Moretti Passos |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |