Data/hora: 20/06/2024 07:59:44

Biblioteca(s): | Embrapa Agroenergia.
Data corrente: | 18/02/2021
Data da última atualização: | 20/04/2021
Autoria: | JENSEN, A. T.; GAMBETTA, R.; MACHADO, F.
Afiliação: | Alan Thyago Jensen, Universidade de Brasília; ROSSANO GAMBETTA, CNPAE; Fabricio Machado, Universidade de Brasília.
Título: | A versatile route to the synthesis of pressure-sensitive adhesives and polyHIPE-like microparticles: an experimental study on glycerol valorization.
Ano de publicação: | 2020
Fonte/Imprenta: | Materials Today Communications, v. 25, 101407, Dec. 2020.
DOI: | https://doi.org/10.1016/j.mtcomm.2020.101407
Idioma: | Inglês
Conteúdo: | This present work focuses on the synthesis of styrene / n-acylglycerol (n-ACG) (a macromonomer formed by glycerol esterification with acrylic acid catalyzed by methane sulfonic acid) copolymers through suspension polymerization process. The final properties of poly(styrene-co-n-acylglycerol) was strongly dependent on the n-ACG fraction into the polymer chains. The effect of n-ACG on the copolymer properties was evaluated and a huge reduction in both the thermal stability and the Tg values (from 93&#8201;°C for polystyrene homopolymer to &#8722;22&#8201;°C for styrene / n-ACG copolymers synthesized with 20&#8201;wt% of n-ACG) was observed when the n-ACG fraction was increased. The variations in the thermal properties were accompanied by drastic morphological changes of the materials, depending essentially on the n-ACG composition as for instance: i) porous spherical particles with polyHIPE-like structures (copolymers containing from 5 to 15&#8201;wt% of n-ACG), which indicates that these porous microparticles may be used as support/carries in heterogeneous catalysis, ion exchange resins, and controlled drug delivery, among others; ii) adhesive films containing n-ACG fractions higher than 15&#8201;wt%, conferring "tack" features similar to the one observed in for pressure-sensitive adhesives (PSA) evaluated by using a rolling ball test. Mechanical tests also showed that the polymer adhesives have an enormous potential to be used as PSA materials in the adhesive industry.
Palavras-Chave: | Glycerol valorization; PolyHIPE microparticles; Pressure sensitive adhesives (PSA); Suspension polymerization.
Thesagro: | Adesivo; Glicerina; Polimerização.
Thesaurus Nal: | Adhesives; Glycerol; Polymerization.
Categoria do assunto: | --
Registro original: | Embrapa Agroenergia (CNPAE)
Exemplares: | CNPAE - (3839-1) - UPC - AP - DD -  -  -  - DIS