Two-step route polycondensation for polynaphthalimides synthesis through high molar mass soluble precursors: A kinetic study

Autor(es)

Passos, Heloisa Moretti ^[1] ; Felisberti, Maria Isabel ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, UNICAMP, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 137, n. 41 MAR 2020.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 15/25406-5 - Organizando a matéria: colóides formados por associação de surfactantes, polímeros e nanopartículas
• Beneficiário: Watson Loh
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/22724-9 - Síntese e caracterização de copolímeros de polinaftalimidas e seus compósitos com óxido de grafeno reduzido
• Beneficiário: Heloisa Moretti Passos
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto