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Modificações quÃmicas de compósitos de polipropileno/quitosano
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ISBN10: 6208859611
ISBN13: 9786208859619
Publisher: Edicoes Nosso Conhecimento
Published: Jul 1 2025
Pages: 180
Weight: 0.55
Height: 0.41 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208859619
Publisher: Edicoes Nosso Conhecimento
Published: Jul 1 2025
Pages: 180
Weight: 0.55
Height: 0.41 Width: 6.00 Depth: 9.00
Language: Portuguese
A produção de materiais amigos do ambiente é principalmente desencadeada pela questão ambiental dos compósitos à base de petróleo e também pela necessidade de obter materiais com as propriedades desejadas. Uma das estratégias mais eficazes para melhorar as propriedades e a biodegradabilidade dos materiais compósitos é a substituição de cargas sintéticas por fibras naturais. A quitosana é uma fibra natural que possui excelentes propriedades mecânicas e térmicas. Tem sido utilizada como reforço em compósitos plásticos, embora não esteja tão difundida como as fibras sintéticas. Geralmente, a incompatibilidade entre a matriz polimérica e a fibra é um grande inconveniente no fabrico de compósitos poliméricos devido à diferença de polaridade entre as fibras naturais e as matrizes poliméricas. Para atenuar o problema da adesão, é possÃvel melhorar a adesão da interface matriz-fibra através da modificação quÃmica, por meio de um tratamento da superfÃcie da carga ou de um agente de acoplamento.
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