I was wondering whether there is somewhere a dataset collecting the mechanical properties of different filaments.
Some filament vendors provide some mechanical properties data about their filament, others don’t. On the few comparison I was able to make, I noticed big differences among the same filament type, such as PLA+.
For example, regarding the Flexural Modulus, one brand of PLA+ could report 4175Mpa, while another one reports 1973Mpa. Clearly, the second offers a much higher Elongation at Break. This means that depending on the application, it could make sense to select one brand of filament with respect to another (of the same type).
I would expect this type of mechanical properties to be easy to fetch, but a lot of vendors provide only how accurate the diameter of their filaments is.
(edit: typo)
A word to the wise, different brands of “PLA+” are not the same filament. There is no standard or even consensus on what qualifies a particular polymer alloy as “PLA+” and thus every manufacturer does their own thing and just calls it whatever they feel like. The same is true for “PLA Pro” and “PLA Extreme” or “PLA Tough” or whatever other monikers you can find.
I would not be at all surprised to find some unscrupulous vendor selling just ordinary PLA and calling it “PLA+” just for marketing purposes (a.k.a. lying about it).