Thanks so much for your ideas.
We've tried several things. Doesn't seem to matter whether the reactor is cold or warm. We have run the 1st and 2nd batch on the same day and on a Friday/Monday. The last thing we tried was to powerwash the reactor both before and after the 1st batch thinking...
Thank you patprimmer. Based on comparison of graphs of heating rate, reaction time, pressure, agitation rate etc. we can see no obvious difference between the first and second batch. This is why we are puzzled.
We manufacture several types of acrylic polymers using suspension polymerization. We have only one reactor so typically we will make 4-10 batches of one type then switch to the next type. With one type only we are experiencing a significant difference in particle size between the first batch in...
