Could anyone suggest a source of water soluble oligomers of polylactide?

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Vivek Patil

Typically, oligomers are hard to find as 'off-the-shelf' products. However, if you perform mild depolymerization of PLA using any method (e.g. pyrolysis, hydrothermal/solvent liquefaction, solvolysis), you will end up with some fraction of PLA getting converted to oligomers. This is because depolymerization rarely leads to 100% of monomeric products. The unreacted PLA will go to the solid char fraction. You can perform solvent-extraction of monomers and then filter them out, and use the remaining liquid fraction (which is nothing but oligomers) for your research.

Micro-scale pyrolysis: https://www.sciencedirect.com/science/article/abs/pii/S0960852418312872

Lab-scale pyrolysis: https://www.sciencedirect.com/science/article/abs/pii/S0360544221004801

Solvent liquefaction: https://www.sciencedirect.com/science/article/abs/pii/S136403212030647X

Lëonid Volkov

HI Vivek,

thank you so much for such a detailed response.

I will read all the documents you have suggested.

Thank you very much.

Marius Murariu

Dear Lëonid,

By considering your objectives, maybe this information could help! Condensia (Spain) is an industrial supplier for LACTIC ACID OLIGOMERS (https://www.condensia.com/en/products/additives-for-bioplastics/lactic-acid-oligomers).

I believe that they can help you, don’t hesitate to contact Condensia with your specific questions/requests.

Good luck in your R&D work and best regards,

Marius

Hi Marius,

Thank you very much for your answer.

Condensia was my first option. Unfortunately, I could not get small amounts of free samples of Condensia, as I only need a few tens of mg for proof of concept and I am not willing to buy per kilograms at the moment.

By the way, I saw that you are an engineer in biopolymer (nano)composites. Do you have any experience in producing nanoparticles by spray drying or a similar technique? We are investigating the usefulness of this technology for our needs.

Thank you.

Chen Jingwen

Hi Lëonid,

You may make an inquiry at Alfa Chemistry, they offer kinds of good-quality materials.

https://www.alfa-chemistry.com/inquiry