Experiment § Use a molecular sieve to reduce the moisture content
The customer needed a transparent, heat-curing, one-component epoxy resin. From these conditions, only cationic polymerization systems are suitable. During testing, the customer found that the moisture of the resin affected the product and requested that the content be reduced from 2,000 ppm to less than 500 ppm. We used the 701 KF Titrino for moisture content analysis (Figure 1). The silane hydrolysis reaction is first used to heat the water removal at 165°C (Figure 2). After two days, the water content dropped to 400 ppm, but the resin appearance turned yellow. The walls of the experimental aluminum cup were agglomerated, so we wanted to find another alternative method (Figure 3, 4). Therefore, we used 10~40% wt zeolite to absorb the moisture in the resin and put it on a ball mill for experimentation (Figure 5). After continuous rotation, the resin is better able to remove moisture than when it is stationary. With this method of removing water, it is difficult to avoid the powder of the molecular sieve falling into the resin and affecting the penetration rate of the cured product. If the resin after water removal is filtered, the molecular sieve powder that was originally dispersed in it can be filtered, showing a transparent appearance. The water content of JE284-3 is reduced by 300~400ppm, and the cured product has good resistance to gaseous and liquid moisture. Interested parties are welcome to contact us.
─Author: Ms. Hui-Li, Zhang
Activity § Knowledge collaborative management
Since its establishment in 1999, the company has accumulated many paper materials. These data are quite scattered and complex. If it is not a frequently accessible document, it is difficult to find it, and it is necessary to find the document from a specific colleague. The import of a knowledge management system is to sort out the old documents individually, and you can quickly find the data through keyword search. More importantly, newcomers can be familiar with the unit's data after the system is established and read the textbooks. Case studies and the inheritance of knowledge will not be missed (Figure 1~4).
Knowledge § What is the general thermal conductivity? (2)
Thermally conductive materials are usually made by mixing organic resins with inorganic powders. In order to insulate, inorganic powders cannot be selected with conductive metal powders, so non-conductor powders must be used, with alumina (30-40 W/mK) as the largest. The resin and alumina are mixed, and the latter has a thermal conductivity of 0.8, 1.2, and 3.4, with a weight ratio of 70%, 80%, and 90%, respectively. The thermal conductivity of 93% and 94% by weight is 4.4 and 5.9, respectively. Thermally conductive powders must be added in very high amounts to increase the thermal conductivity significantly.
Living § Published 400 issues of the biweekly newspaper!
This is the 400th issue of the biweekly report. A publication that lasted for 16 years was a long journey. Many friends are curious: "Where did the biweekly report's content come from?" "What will be left behind for Everwide?" For a long-running publication, this is the heart of the matter. Our readers are most interested in the "experimental report," based on the monthly "R&D meeting": colleagues come to the stage to report their research, write biweekly reports, and finally become development examples. The "knowledge" section comes from work problems, which gradually accumulates into a question bank for internal training and is reference data for a research institute's course. Compared with technical experiments, "Activity" is based on company activities, and "Living" is about the personal life of colleagues, which is also an alternative experimental report. The content of the latter two columns, we expanded it into another biweekly newspaper of the factory, "UPGRADING!" has been issued for 70 issues. You are welcome to click on the link to watch issues 1 and 70 online! We used to say that publishing 100 issues is "creativity," 200 issues is "experience," and 300 issues is "persistence." What can 400 tell us? I want to talk about synergy. If a thing is promoted for a long time, it will naturally develop a 1+1>2 effect. What we find difficult, we don't find difficult for a long time. With less effort, we can do more. Finally, I would like to thank you here for walking with us for so long and doing so many experiments with us. An experiment for life.
— Author: Dr. Ming-Xu, Li
