Hi. I'm making some phenolic resol resin but the problem is, it generates a lot of voids. The water has been eliminated under reduced pressure but still when I cure it using oven, I got highly porous materials. Is there anyone can share tips, cure cycle or processing conditions that I can try on? I even tried the slow cure which took 4 days in the oven but failed! The samples came out very fragile and cracked! I did in autoclave too at 7 bar pressure but still got bubbles in it. Please anyone can help me, I'm dying to get good samples. Thank you.
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