BR
@Brunomaes
10 points

Bruno Maes

Last activity a year ago

Signed up a year ago

What is the melting point of plastic?

EL Elsahagandonkoh asked on 19 January 2020, 19:26
BR

Bad question.

there is no one substance labeled ‘plastic’ but more then a dozen, of only the thermoplastics, and they of course have different melting points; in fact they may have not a real melting point like water or metals but a softening & melting range.

And then you have plastics that don’t have a melting point or range at all, the thermo-hardening plastics. ( Bakelite etc ).

Temp use range :

Softening & melting points :

BR

3th question in a row here that can best be answered by :

Ask Google:

water jar cap making machine

And you get dozens of answers.

20 Liter Water Bottle Cap Manufacturing Machine, 20 Liter Water Bottle Cap Manufacturing Machine Suppliers and Manufacturers at Alibaba.com

BR

Turn ’m upside down and check the relief label / sign.

Probably ABS but there are PP made models too.

BR

If you were asking for household ovens like normally found in kitchens i’m afraid to disappoint you, they normally do not get to over 660°C.

But little and less little hobby ovens for e.g. ceramics can easely reach that temp & higher.

Even a metal can holding alu scrap & heated with a propane torch can do it;

or more elaborate but cheap build it yourself metal foundry.

Of course its better to do it always outside.

… As you can see in many Utube vids.:

BR

There are many off-line ( apps) and online calculators for this in at least 17 different tastes :

A few examples.:

Brick, mortar calculator

Brick and Block Calculator

Number of bricks in a wall

BR

Very incomplete question.

Can not be answered if all the details are retained.

There is more then 1 standard size for this blocks & size is not specified.

Size of the lot says noting about the size of the house.

It is not specified if there is also a cellar, an attic/sloped roof.

And if it is a bungalow or 2 or 3 floors building.

What is comparable to chloroform?

VA Vamshiachanta asked on 26 May 2020, 20:33
BR

Depends on your use.

Is it for degreasing machine parts

or for an extraction ( before) analysis

or as a reagent ?

In the last example you may not find a good alternative,

but for extracting a grease or an oil or a resin from a substrate you sometimes may use Tri ( -chloroethylene )

Trichloroethylene - Wikipedia

an example where it worked perfectly : Alternative solvents to chloroform for gutta-percha removal.

Case Studies on Safer Alternatives for Solvent Degreasing Applications | US EPA

i use Tri on a daily basis.

Is water polluted?

SR Srinivasaraoguduru asked on 23 June 2020, 05:30
BR

What a weird and useless question.

Of course,

yes,

no,

some,

a bit.

Pick your choice.