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Polyester (PET) is an organic material, a polymer plastic that is commonly used as a fiber for cloth production, or a matrix for glass fibers in Fiberglass

In situ Production

Polyesters are polymers (chains) that contain ester groups in their repeating structure. The most common form is polyethylene terephthalate (PET).

  • Polyethylene terephthalate is produced from ethylene glycol and dimethyl terephthalate (DMT) (C6H4(CO2CH3)2) or terephthalic acid.
  • Ethylene glycol is a primary chemical feedstock and is very likely to be produced on Mars fairly soon.


  • Embodied energy: about 125 MJ/kg.
  • Density: 1370 kg/m3
  • Melting point: 115–135 °C
  • Strength: 2,5 MPa (360 psi)
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