Konubinix' opinionated web of thoughts

PLA

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Polylactic acid (PLA) is a bio-degradable polymer that can be produced from lactic acid, which can be fermented from crops such as maize.

— https://reprap.org/wiki/PLA

PLA is harder than ABS, melts at a lower temperature (around 180°C to 220°C), and has a glass transition temperature between 60-65 °C, so is potentially a very useful materia

— https://reprap.org/wiki/PLA

PLA, is a thermoplastic monomer derived from renewable, organic sources such as corn starch or sugar cane.

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

Using biomass resources makes PLA production different from most plastics, which are produced using fossil fuels through the distillation and polymerization of petroleum

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

PLA can be produced using the same equipment as petrochemical plastics, making PLA manufacturing processes relatively cost efficient

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

PLA is a type of polyester made from fermented plant starch from corn, cassava, maize, sugarcane or sugar beet pulp. The sugar in these renewable materials are fermented and turned into lactic acid, when is then made into polylactic acid, or PLA.

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

PLA production uses 65% less energy than producing conventional plastics and generates 68% fewer greenhouse gases and contains no toxins. It can be also remain environmentally friendly should the correct end-of-life scenario be followed

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

no degradation seen in over a year of the material being submerged in seawater at 25°C.

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

see recycling pla

PLA can be degraded by hydrolysis, thermal degradation or photodegradation:

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

four common end-of-life scenarios for PLA:

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

Recycling

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

Composting Industrial composting conditions allow for chemical hydrolysis followed by microbial digestion to degrade the PLA.

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

Incineration End-of-life PLA can be incinerated, creating 19.5 MJ/kg (8,368 btu/lb) of energy and leaving no residue.

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

Landfill While PLA can go to landfill, this is the least environmentally friendly option, due to the slow degradation rates of the material in ambient temperatures.

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

acetone softens the surface of the material, making it sticky without dissolving it so it can be welded to another PLA surface

— https://www.twi-global.com/technical-knowledge/faqs/what-is-pla

Notes pointant ici