🚀 go-pugleaf

polymer cures always with a volume change.  rate depends on temperature as
much as initiator (UV).  non-uniform temperature causes un uniform cure
rate.
this not based on experience with the adhesive in question as it was not
specified.

Yachin Yarchi wrote in message <36989446.BB35FBA1@newmail.net>...
>I'm trying to join together two parts which make an optical device.
>the part is a 1 mm dia. glass tube 16 mm long which seat in a holder 8
>mm long with a 2 mm dia. hole made of alodined aluminum.
>I adjust the tube in the correct position with true position accuracy of
>
>1 micrometer (after applying UV adhesive to it).
>when I expose the part to UV concentrated light source for few seconds,
>I find that the tube tip had moved about 40 microns around the prior
>positions.
>I thought that it might be that the  C=C double linkage which opens to
>-C- linkage not uniformly, cause change in molecular volume and push the
>
>tube during curing.
>If anyone is familiar with problems like that and can help me or refer
>me to someone which may help me ,please do so.
>
>Thanks
>
>Yachin Yarchi
>
>
>