Renewable elastomers based on blends of maleated polypropylene and plasticized starch

Candice DeLeo, James Goetz, Brian Young, Sachin S. Velankar

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Most recent developments in polymers from renewable resources have focused on thermoplastics, whereas there has been no comparable development of plastics with elastomeric properties. Here we evaluate the possibility of developing renewable elastomers based on starch. Potato starch plasticized with glycerol (called plas-ticized starch, or PLS) was melt-blended with small quantities (5 wt % or 15 wt%) of maleated polypropylene (MAPP). The maleic anhydride groups of the polypropylene are expected to react with the hydroxy groups of starch under melt blending conditions. The resulting blends of MAPP and PLS were characterized by mechanical testing, SEM, DMA, and DSC. SEM, solubility and adhesion tests indicate that the blends are two-phase materials, in which the continuous phase PLS is physically crosslinked by polypropylene domains. The materials showed rubbery properties as judged by a low glass transition temperature (∼-50°C independent of polypropylene content), and a wide rubbery plateau in DMA experiments that extended from room temperature to as high as 170°C. The tensile properties are also characteristic of elastomers. However, slow aging due to starch crystallization, and extraction of glycerol upon water exposure remain two challenges that must be overcome before the materials can be used as practical elastomers.

Original languageEnglish (US)
Pages (from-to)1775-1781
Number of pages7
JournalJournal of Applied Polymer Science
Volume116
Issue number3
DOIs
StatePublished - May 5 2010

Fingerprint

Elastomers
Polypropylenes
Starch
Dynamic mechanical analysis
Glycerol
Maleic Anhydrides
Scanning electron microscopy
Mechanical testing
Maleic anhydride
Crystallization
Tensile properties
Thermoplastics
Polymers
Adhesion
Solubility
Aging of materials
Plastics
Water
Experiments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

DeLeo, Candice ; Goetz, James ; Young, Brian ; Velankar, Sachin S. / Renewable elastomers based on blends of maleated polypropylene and plasticized starch. In: Journal of Applied Polymer Science. 2010 ; Vol. 116, No. 3. pp. 1775-1781.
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Renewable elastomers based on blends of maleated polypropylene and plasticized starch. / DeLeo, Candice; Goetz, James; Young, Brian; Velankar, Sachin S.

In: Journal of Applied Polymer Science, Vol. 116, No. 3, 05.05.2010, p. 1775-1781.

Research output: Contribution to journalArticle

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