Science of boosting, what causes some rubbers to curl and others not?

[TensorBackhand]

I just boosted 2 rubbers, the Rxton 5 and the Rxton 1.

I see that the Rxton 5 curled heavily after 1 thin layer of booster, but the Rxton 1 didn't curl much after a thick layer of booster.

Why do some rubbers curl more and some curl less?

 

[Tyce]

Some factors that will cause a rubber to curl:

A topsheet that doesn't stretch easily. Booster expands the sponge, putting strain on the sponge-topsheet interface. If the topsheet is resistant to the amount of stretching force, you get a curl.

A sponge that absorbs booster will need to have the right molecular structure for the booster to interact. I'm not an advanced chemist here, but you want the mix of booster and sponge molecules to make something bigger, not have the molecular structure curl into itself. So having a favourable chemical structure of the sponge is certainly something.

The physical structure of the sponge can be helpful, too. Think Hurricane 3 blue sponge, highly porous. Not just giving fast absorption, but with a structure that makes rapid sponge expansion easier.

If a rubber curls less, that doesn't mean it's not expanding. It just means the rate of expansion is slow enough for the topsheet to keep up. (of course, zero expansion is pretty easy to keep up with). You would be able to measure the expansion, though.

Last, why do some rubbers barely change after boosting?
One, the sponge might be a bad chemical match for the booster. Think of the molecular chains curling up rather than forming a larger structure.
Two, pre tuned rubbers or sandwich combination that's already high tension. The added booster might work but have minimal extra effect, or the rubber is already saturated so the booster doesn't have anything to bond with (essentially the same effect as a bad chemical match).

 

[igorponger]

So far, there is no fundamental theory of swelling rubber materials in presence of oil compounds. The so called boosting rubbers with oil applications is a mere self-entertainment by players (kinda a manual friggination), without good academic base.

https://vk.com/doc199930161_6881828...VXUyBTuRytZDdvZMS0JkelDeVg&api=1&no_preview=1

https://psv4.userapi.com/s/v1/d2/n1-st012H7HdoeK4cS6_Xm-aGkJW_dt72yWrOOMnwJT1P-btIuHnRnd1OfCNiG1zwSiwdZ1-hHRImxwVEbYWjSDMihVEnjfFjfS2-uibIs0qW9amwtWEEqFLm1TfxKnVuJJ9YqI/swelling-of-synthetic-rubbers-in-mineral-oils-anilin-point-1940.pdf

The very best experimental study on the rubber physical mutation in presence of oil compounds dated back to 1940

NO good evidence of sponge getting more lively (springy) upon treatments with oils as yet. It is a common misbeliev (chimera) with casual folks, too far from virtual truth.

 

[Jslick89]

So far, there is no fundamental theory of swelling rubber materials in presence of oil compounds. The so called boosting rubbers with oil applications is a mere self-entertainment by players (kinda a manual friggination), without good academic base.

https://vk.com/doc199930161_6881828...VXUyBTuRytZDdvZMS0JkelDeVg&api=1&no_preview=1

https://psv4.userapi.com/s/v1/d2/n1-st012H7HdoeK4cS6_Xm-aGkJW_dt72yWrOOMnwJT1P-btIuHnRnd1OfCNiG1zwSiwdZ1-hHRImxwVEbYWjSDMihVEnjfFjfS2-uibIs0qW9amwtWEEqFLm1TfxKnVuJJ9YqI/swelling-of-synthetic-rubbers-in-mineral-oils-anilin-point-1940.pdf

The very best experimental study on the rubber physical mutation in presence of oil compounds dated back to 1940

NO good evidence of sponge getting more lively (springy) upon treatments with oils as yet. It is a common misbeliev (chimera) with casual folks, too far from virtual truth.

You literally have no idea what you're talking about.