Chemical modification of poly(epichlorohydrin) with phenolate. Studies of the side reactions

Pérez, Mónica; Reina, José Antonio; Serra, À.; Ronda, Juan C.

doi:10.1002/(sici)1521-4044(199806)49:6<312::aid-apol312>3.0.co;2-l

Cited by 21 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The M̄ w values obtained indicate that the polymeric main chain degraded quite considerably during the reaction. Several papers ,− have reported that this process is an important side reaction when PECH is chemically modified through nucleophilic substitution reactions. On the other hand, although at first sight it may seem meaningless to compare viscosity values because the hydrodynamic volumes of the polymers should be considerably different, the viscosity values of all the modified polymers were much lower than virgin PECH, which suggests that the cleavage side reaction takes place.…”

Section: Resultsmentioning

confidence: 99%

Vinyl-Terminated Side-Chain Liquid-Crystalline Poly(epichlorohydrin) Derivatives Containing Biphenyl and Naphthalene Mesogenic Moieties

Callau¹,

Reina²,

Mantecón³

et al. 1999

Macromolecules

View full text Add to dashboard Cite

Poly(epichlorohydrin) (PECH) was modified to a considerable extent with mesogenic acids, namely 4′-(ω-alkenoxy)-4-biphenylcarboxylic acids and 6-(ω-alkenoxy)-2-naphthalenecarboxylic acids, which leads to side chain liquid crystalline polymers which can be cross-linked through their terminal double bonds in a further step. Cleavage and cross-linking side reactions, which have been reported elsewhere, were observed. The polymers were characterized by NMR, IR, SEC-MALLS, viscosimetry, elemental analysis, DSC, and TGA. The thermal stability of the modified polymers was higher than that of the starting PECH. The mesophases were identified by DSC, light-polarized optical microscopy, and X-ray diffraction. The biphenyl derivatives show smectic A mesophases consisting of a bilayer or partial bilayer structure, which is modulated for the 4′-(5-hexenoxy)-4-biphenylcarboxylic acid derivatives (S A ˜). The 6-(5-hexenoxy)-2-naphthalenecarboxylic acid and the 6-(10-undecenoxy)-2-naphthalenecarboxylic acid derivatives show nematic and smectic C mesophases, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

Vinyl-Terminated Side-Chain Liquid-Crystalline Poly(epichlorohydrin) Derivatives Containing Biphenyl and Naphthalene Mesogenic Moieties

Callau¹,

Reina²,

Mantecón³

et al. 1999

Macromolecules

View full text Add to dashboard Cite

show abstract

“…This could be explained by the activation of the aryl alcohol by CsF. 16 Initially, this increases the proton-accepting capabilities of the base as well as providing a counter ion to the resulting aryloxide, facilitating the desired reaction. This activation cannot be as easily achieved in the case of 13, due to the increased distance between the carbonyl oxygen, and the acidic proton to be abstracted in anthrone.…”

Section: Synthesismentioning

confidence: 99%

New propranolol analogues: binding and chiral discrimination by cellobiohydrolase Cel7A

Fagerström

Nilsson²,

Berg

et al. 2006

Org. Biomol. Chem.

View full text Add to dashboard Cite

Novel propranolol analogues have been designed and synthesised and their enantioselective binding to the cellulose degrading enzyme, Cel7A, has been evaluated. Affinity and enantioselectivity have been determined by capillary electrophoresis experiments. Ligands with significantly improved affinity and selectivity have been obtained and an analysis of the results has led to insights concerning the relation between the changes in ligand structure and selectivity as well as affinity to the protein.

show abstract

“…64 As ligações C-Cl são susceptíveis a ataque nucleofílico como carboxilatos, fenolatos e azidas, o que possibilita a modificação química e a reticulação da PEPi e copolímeros. 64,65 Figura 6: Reação de enxertia entre PA6 e PEPi através: da aminólise do elastômero por um grupo terminal amina da PA6 (a) e alquilação do elastômero (b). Adaptado de (62).…”

Section: -Compósitos De Pa6 E a Grafiteunclassified

Compósitos de PA6/grafite expandida tenacificados com o elastômero poli(epicloridrina)

Sanches Bevilacqua

View full text Add to dashboard Cite

A Ata da defesa assinada pelos membros da Comissão Examinadora, consta no SIGA/Sistema de Fluxo de Dissertação/Tese e na Secretaria do Programa da Unidade. Este exemplar corresponde à redação final da Dissertação de Mestrado defendida pelo aluno ANDRÉ SANCHES BEVILACQUA , aprovada pela Comissão Julgadora em 16 de março de 2021. DEDICATÓRIA Aos meus pais Argemiro e Ana Maria A minha irmã Lívia A minha avó Vitalina AGRADECIMENTOS  A minha orientadora, professora Maria Isabel Felisberti, conhecida como "Bel Felisberti", pela oportunidade de desde a minha iniciação científica em trabalhar no grupo e por todo o aprendizado. Agradeço por seu papel de professora, pelas oportunidades de aprender coisas além do meu projeto, por se preocupar com a minha formação e pelas conversas e reflexões.  Aos meus pais, Argemiro e Ana, por sempre me apoiarem, me dar a oportunidade de ter uma boa formação e me incentivar nos estudos. A Lívia, além de irmã por ser minha melhor amiga e por poder sempre contar com você.  Aos técnicos, Walkyria, Moisés, Fabi, Deborah por possibilitarem a caracterização de boa parte dos resultados desse projeto.  Aos meus colegas Lucas Fonseca, Daniela, Rafael Natal, Giovanni e Heloísa por revisarem meus textos. Ao Rafael Natal e Heloísa por me darem suporte nesse tempo de pandemia.  Aos meus amigos Lucas Fonseca, Daniela, Victor Ferrão e Rafael Natal pelas risadas e bons momentos durante o meu tempo no grupo.  Aos meus amigos Felipe Donadon, Rafael Gasparini e Lucas Costa pelas conversas e por poder compartilhar sobre o meu trabalho.  A Fabiana Straccialano, minha companhada, por sempre me apoiar, dar sugestões, se interessar pelo meu trabalho, compreensão e pelo companheirismo. A Solvay pela doação da PA6 utilizada neste trabalho. Ao Instituto de Química pela infraestrutura fornecida e por assim poder tornar este trabalho concreto. Este trabalho foi realizado com o apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Processo 001.

show abstract

Chemical modification of poly(epichlorohydrin) with phenolate. Studies of the side reactions

Cited by 21 publications

References 12 publications

Vinyl-Terminated Side-Chain Liquid-Crystalline Poly(epichlorohydrin) Derivatives Containing Biphenyl and Naphthalene Mesogenic Moieties

Vinyl-Terminated Side-Chain Liquid-Crystalline Poly(epichlorohydrin) Derivatives Containing Biphenyl and Naphthalene Mesogenic Moieties

New propranolol analogues: binding and chiral discrimination by cellobiohydrolase Cel7A

Compósitos de PA6/grafite expandida tenacificados com o elastômero poli(epicloridrina)

Contact Info

Product

Resources

About