Hot melt glue experiment

[nospam]

I'm quite keen on using hot melt glue for sticking and encapsulating
electronic things and thought I would do an experiment.

I took a 10M metal film resistor, cut the leads short and soldered a bit of
ordinary PVC hook up wire to each.

I then coated the resistor, joints, and a bit of the wire with hot melt
glue. Just generic semi-transparent hot melt stick.

I took a jam jar and poked two holes in the lid, threaded the wires through
and sealed each side of the lid with more hot melt glue.

I half filled the jam jar with a saturated solution of table salt and stuck
the lid on with the resistor submerged. The resistor measured 10.123M at
the time.

The jam jar has been sat on a window ledge getting daylight and a little
direct sun light for the last 23 months. I gave it an occasional shake.

It hasn't leaked, the lid seal is intact. The hot melt glue seemed to
decompose a little. It seems thin layers from the surface detached and are
floating in the solution. The lid has gone rusty so the solution is brown
with a bit of brown scummy decomposed or detached hot melt floating it.

The resistor measures 10.087M today (and probably a bit more if it were
warmer here). .

I an pretty impressed. The glue has kept the solution off the resistor and
the seal between glue and hook up wire has held up as has the seal in the
lid.

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[prymtyme]

This is almost worth something. You have no idea what your results
mean since you did not include a bare resistor next to the
encapsulated one. Therefore you have no idea whether the hot melt
actually did anything.
Sorry to be a spoil sport but basic scientific procdure should ALWAYS
be followed for this type of test.....especially if you're going to
spend 2 years doing it.
good luck on your next one.

 

[nospam]

This is almost worth something. You have no idea what your results
mean since you did not include a bare resistor next to the
encapsulated one. Therefore you have no idea whether the hot melt
actually did anything.

I don't need to stick a bare 10M resistor in saturated salt solution to
know it will measure significantly less than 1M. You top posting moron.

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