Biodegradable nanocomposites based on poly(butylene succinate)/organoclay

Abstract

In this work, we try to incorporate the inorganic system into the biodegradable polymers to compose an organic/inorganic polymer hybrid. Various nanocomposites of poly(butylene succinates) (PBS) with different ratios of organically modified layered silicates (OMLS) prepared by solution blending were investigated. The OMLS used for the preparation of nanocomposites were functionalized ammonium salts modified montmorillonite. The effects of OMLS on the nanocomposites were investigated by XRD, TEM, DMA and TGA in the aspect of the d-spacing of clay, mechanical and thermal properties. Interestingly, all these nanocomposites exhibited improved properties when compared with the pristine PBS sample. XRD indicates that the layers of clay were intercalated by the modifiers, and the interlayer distance of organoclay in the nanocomposites could be extended to about 29.4 angstrom. Moreover, the thermal stability of the nanocomposites was enhanced by the addition of organoclay via TGA study, closely related to the organoclay content in the PBS matrix. DMA data shows that the storage and loss moduli were concurrently enhanced by the addition of organoclay as compared to the pristine PBS sample. Moreover, the glass transition temperatures also increased about 5 to 20 degrees C (from DMA, peak of tan delta) for the various organoclay-containing samples. The enhanced mechanical and thermal properties can be achieved from these organoclay modified-nanocomposites

Structure and properties of poly(butylene succinate) filled with lignin: A case of lignosulfonate

“…With the purpose of improving the performance and reducing the cost of PBS-based materials, cellulose acetate, 11 soy protein, 12 corn starch, 13,14 chitosan, 15 layered silicate, 3,16 organoclay, 17 attapulgite, 18 carbon nanotubes, 19 poly(lactic acid), 20 and poly (ethylene oxide) 21 have been introduced to modify the PBS plastics.…”

Effect of organo-modified montmorillonite on poly(butylene succinate)/poly(butylene adipate-co-terephthalate) nanocomposites

“…It can be processed in the field of textiles into melt-blown, multifilament, monofilament, flat and split yarn [1]. However, other properties such as gas barrier properties, melt viscosity for further processing and so on, are frequently insufficient for various end-use applica-tions [2]. Poly(butylene adipate-co-terephthalate) PBAT, trade name ECOFLEX ® is an aliphatic/aromatic copolyester based on the monomers 1,4-butanediol, adipic acid and terephthalic acid.…”

Biodegradable Polymer/Clay Nanocomposites

“…The formation of microcomposites has been reported by Someya et al (2004) when processing PBS and MMT-Na+ by melt intercalation. On the other hand, many researchers have reported obtaining well-intercalated structures when processing PBS with organo-modified clays such as C10A, C30B, MMT-LEA by either solvent casting, melt intercalation, or in situ polymerization Someya et al 2004;Shih et al 2007Shih et al , 2008Hwang et al 2009). Some authors have also reported the preparation of completely exfoliated PBS/clay nanocomposites by solvent casting (Shih et al 2007(Shih et al , 2008, melt intercalation , and in situ polymerization (Rong et al 2002) as well.…”