Cross-link in norbornadiene-based polymers from ring-opening metathesis polymerization with pyrrolidine-based Ru complex
| Autor: | Larissa R. Fonseca, José L. Silva Sá, Benedito S. Lima-Neto, Valdemiro P. Carvalho |
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| Přispěvatelé: | Universidade de São Paulo (USP), Universidade Estadual do Piauí, Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2017 |
| Předmět: |
Polymers and Plastics
Norbornadiene 02 engineering and technology CATÁLISE 010402 general chemistry Metathesis 01 natural sciences Ruthenium Pyrrolidine ROMP chemistry.chemical_compound Polymer chemistry Materials Chemistry Ring-opening metathesis polymerisation Ancillary ligand Norbornene Non-carbene complexes General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Polymerization 0210 nano-technology Acyclic diene metathesis |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1436-2449 0170-0839 |
| Popis: | Made available in DSpace on 2018-12-11T16:50:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-08-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Ring-opening metathesis polymerization (ROMP) of norbornadiene (NBD) with [RuCl2(PPh3)2(pyrrolidine)] as the starting complex was evaluated as a function of reaction time, solvent volume, and atmosphere type at 25 °C. Quantitative yields of polyNBD were obtained either under inert argon atmosphere or in air, with 2 mL of CHCl3, for 30 min. Copolymerization of NBD with norbornene (NBE) resulted in 100–70% yield under argon, depending on the NBE/NBD molar ratio, and in 70% yield in air, with 2 mL, for 120 min. TGA, DSC, and DMA measurements and swelling tests supported the occurrence of cross-linking in homopolyNBD and in the copolymers isolated from polymers. SEM micrographs showed porous polymeric NBD materials with pores that decreased in size when increasing the amount of NBD in the starting reaction composition. Results from amine parent complexes when the amine was piperidine or perhydroazepine are also discussed, with high cross-linking degree from reaction with the pyrrolidine complex. Instituto de Química de São Carlos Universidade de São Paulo, CP 780 Centro de Ciências da Natureza Universidade Estadual do Piauí Faculdade de Ciências e Tecnologia UNESP Univ Estadual Paulista Faculdade de Ciências e Tecnologia UNESP Univ Estadual Paulista FAPESP: 2011/12571-7 FAPESP: 2012/23948-7 |
| Databáze: | OpenAIRE |
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