Preparation and Properties of Biodegradable Foams

Jacqueline Stagner, Ramani Narayan

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

Foam extrusion of biodegradable polyester [poly(butylene adipate-co-terephthalate) (PBAT)] and its blends with maleated thermoplastic starch (MTPS) using a chemical blowing agent was performed. The effect of MTPS and percentage of chemical blowing agent on various foam properties is discussed. In general, an increased amount of PBAT in the foams improves the properties of the foams. The foam samples were characterized by measurements of density, expansion ratio, specific length, compressive strength, resiliency, moisture sorption, and imaging using digital light microscopy. Density, expansion ratio, and specific length measurements show that the best characteristics of lowest density, highest expansion ratio, and highest specific length are exhibited by the PBAT samples. The compressive strength and foam density exhibit a power-law relationship. Greater amounts of PBAT in the samples increase the resiliency and decrease the steady state weight gain during moisture sorption. All samples show regions of unfoamed material when only 3% chemical blowing agent is used, but when 5 and 7% chemical blowing agent is used, the samples exhibit cells throughout the matrix.

LanguageEnglish (US)
Pages598-606
Number of pages9
JournalJournal of Polymers and the Environment
Volume19
Issue number3
DOIs
StatePublished - Sep 2011

Profile

Foams
Blowing agents
Starch
Thermoplastics
Compressive strength
Sorption
Moisture
Polyesters
Optical microscopy
Extrusion
Imaging techniques
butylene glycol adipic acid polyester
terephthalic acid

Keywords

  • Biodegradable
  • Foam
  • PBAT
  • Thermoplastic starch

ASJC Scopus subject areas

  • Environmental Engineering
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Preparation and Properties of Biodegradable Foams. / Stagner, Jacqueline; Narayan, Ramani.

In: Journal of Polymers and the Environment, Vol. 19, No. 3, 09.2011, p. 598-606.

Research output: Contribution to journalArticle

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abstract = "Foam extrusion of biodegradable polyester [poly(butylene adipate-co-terephthalate) (PBAT)] and its blends with maleated thermoplastic starch (MTPS) using a chemical blowing agent was performed. The effect of MTPS and percentage of chemical blowing agent on various foam properties is discussed. In general, an increased amount of PBAT in the foams improves the properties of the foams. The foam samples were characterized by measurements of density, expansion ratio, specific length, compressive strength, resiliency, moisture sorption, and imaging using digital light microscopy. Density, expansion ratio, and specific length measurements show that the best characteristics of lowest density, highest expansion ratio, and highest specific length are exhibited by the PBAT samples. The compressive strength and foam density exhibit a power-law relationship. Greater amounts of PBAT in the samples increase the resiliency and decrease the steady state weight gain during moisture sorption. All samples show regions of unfoamed material when only 3{\%} chemical blowing agent is used, but when 5 and 7{\%} chemical blowing agent is used, the samples exhibit cells throughout the matrix.",
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