Banca de DEFESA: CECILÃNE REGINA DIOCLECIA DA SILVA RIBEIRO DE ASSIS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CECILÃNE REGINA DIOCLECIA DA SILVA RIBEIRO DE ASSIS
DATE: 29/07/2024
TIME: 09:00
LOCAL: Sala 64 do INTM
TITLE:

SYNTHESIS AND CHARACTERIZATION OF POLY(N-VINILCAPROLACTAM) COPOLYMERIZED WITH POLY(BUTYLENE SUCCINATE) BY CHEMICAL WAY

KEY WORDS:

Thermoresponsiveness; poly(N-vinylcaprolactam); copolymer; poly(butylene succinate).

PAGES: 69
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Smart polymers, which respond to external stimuli, offer adaptable physicochemical properties, or which make them versatile in different areas of application, being widely trained in the food, pharmaceutical and biomedical industries. A notable class of these polymers are thermoresponsive ones, such as poly(N-vinylcaprolactam) (PNVCL). PNVCL presents a phase transition close to body temperature, presenting an amphiphilic character with temperature variation, in addition to being biocompatible and having low toxicity. Its properties and processability can be changed through combination with other polymers, as in the case of copolymerization. The present work aimed to study and develop the copolymer between poly(N-vinylcaprolactam) and poly (butylene succinate), PNVCL-co-PBS, through organic synthesis. Poly (butylene succinate) (PBS) was chosen because it is a biocompatible, biodegradable and easily processable polymer in the molten state, with applicability in several sectors, although its application in the biomedical area is still little explored. The copolymer precursors were synthesized in the laboratory and, after characterization, were used in the synthesis of the PNVCL-co-PBS copolymer. The physical and chemical characteristics of the developed materials were evaluated using techniques such as attenuated total reflection Fourier transform infrared spectroscopy (FTIR-ATR), gel permeation chromatography (GPC), thermogravimetry (TGA) and differential calorimetry. exploratory (DSC). Furthermore, the thermoresponsiveness of the materials was proven through cloud point tests and contact angle measurement. The results indicated the delivery of the PNVCL-co-PBS copolymer, but a more specific analysis, such as Nuclear Magnetic Resonance (NMR), will be necessary to irrefutably confirm the nature of the material.

COMMITTEE MEMBERS:
Externa ao Programa - 3218488 - DAYANNE DINIZ DE SOUZA - nullInterna - 2572606 - GLORIA MARIA VINHAS
Presidente - 1283002 - YEDA MEDEIROS BASTOS DE ALMEIDA