×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Phenolic curing

Phenolic curing

Phenolic curing

(OP)
How do you know when a phenolic is cured?  Part under pressure for 10 min at 385F, cooled to 260F then ejected.  When put in oven at 175F overnight, got a potato chip...  Why wasn't this cured???

RE: Phenolic curing

noni,

I know only a little about thermosets.  I do know one company that adds a colorant into their material so when it is molded it comes our green or some other color.  When it is fully cured, it turns black.  I do not know the chemistry behind it but perhaps you can look into it with your material supplier.

Good luck.

Dave

RE: Phenolic curing

About 30 yrs ago I used phenolic resin ( "Bakelit A")
with hexamethylenetetramine ( and no dye ). It changed the color from light brown to yellow, when done.

<nbucska@pcperipherals.com>

RE: Phenolic curing

Phenolics are notoriously brittle when used without wood flour, cotton linters or other reinforcement. Maybe that is your problem?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources