Poly(L-lactic) (PLLA)-based blends containing poly(methyl methacrylate) (PMMA) as dispersed phase are reported in the present paper. The blends are prepared by reactive (R-type blends) as well as non reactive (NR-type blends) methodologies, according to the preparation of the blends either polymerizing the acrylic monomer in the presence of PLLA or melt mixing the two polymers (PLLA and PMMA) in bulk. Thermal as well as morphological studies performed on both R and NR blends have revealed an intimate dispersion of PLLA and PMMA. Unlikely previous studied carried out on different aliphatic polyesters but following similar chemical approach mechanical tests on the PLLA-based blends gave no satisfactory response for reactive-type blends. The results are interpreted on the basis of extensive crosslinking of the system caused by the high sensitivity of PLLA to radical attack. The copolymeric phase formed during the reactive blending is isolated and characterised by NMR technique.

Radical polimerization of methyl methacrilate in the presence of biodegradable poly(L-lactic acid). Preparation of blends, chemical-physical characterization and morphology

FALCIGNO, LUCIA;
2000

Abstract

Poly(L-lactic) (PLLA)-based blends containing poly(methyl methacrylate) (PMMA) as dispersed phase are reported in the present paper. The blends are prepared by reactive (R-type blends) as well as non reactive (NR-type blends) methodologies, according to the preparation of the blends either polymerizing the acrylic monomer in the presence of PLLA or melt mixing the two polymers (PLLA and PMMA) in bulk. Thermal as well as morphological studies performed on both R and NR blends have revealed an intimate dispersion of PLLA and PMMA. Unlikely previous studied carried out on different aliphatic polyesters but following similar chemical approach mechanical tests on the PLLA-based blends gave no satisfactory response for reactive-type blends. The results are interpreted on the basis of extensive crosslinking of the system caused by the high sensitivity of PLLA to radical attack. The copolymeric phase formed during the reactive blending is isolated and characterised by NMR technique.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/373794
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 17
  • ???jsp.display-item.citation.isi??? 17
social impact