Experiment § Hydrogenated terphenyl
Once when analyzing a product, hydrogenated terphenyl (61788-32-7) was added to both the AB doses. The structure is shown on the left: hydrogenated terphenyl is obtained by partial hydrogenation of a mixture of ortho, meta, and p-terphenyls in different proportions (saturation is 40%). Average molecular weight: 252. Appearance: Slightly yellow transparent oily liquid. It has a low freezing point of -30°C and low permeability at high temperatures. It can be operated in the liquid phase at 345°C and is currently the best quality liquid phase high-temperature heat transfer oil. Hydrogenated terphenyl can be used in the liquid phase for a long time in the temperature range (-10 ~ 350 ℃) high-temperature heat carrier, has been widely used in synthetic fiber, synthetic resin, synthetic high-temperature plastics, and other polymer industries, textile printing, and dyeing industry, oil industry, Inorganic industry, food industry, organic synthesis industry, paint industry, and coal chemical industry. Hydrogenated terphenyl is non-toxic, odorless, non-polluted, and not pollute the environment. It is a liquid-phase heat transfer oil used for heat transfer at high temperatures. It can provide years of reliable operation even at a service temperature of 345 ℃. You should know that when the heat transfer oil system fails, the production line will have to stop running, so don't randomly choose liquid phase heat transfer oil with unproven reliability. In the operating temperature of -10～350℃, hydrogenated terphenyl is your ideal choice and can ensure the operation of the heat transfer oil system is more reliable.
─Author: Dr. Ming-xu, Li, R&D Engineer, Everwide Chemical
Activity § Quality system
Everwide Chemical officially passed the ISO 9001: 2000 quality certification in 2004 and passed the ISO 9001: 2008 quality certification in 2008. "R&D and innovation" and "improving value" are Everwide Chemical's quality policies. We have a full-time management representative whose work includes: ISO document preparation and review, quality system improvement, internal audit operation, and external audit correspondence, etc. In addition, we invite 3 customers to conduct supplier audits on us every year. For Everwide, this is an opportunity to learn, allowing us to improve. In addition to full-time management representatives, we also have full-time document management representatives responsible for managing numerous documents within the company. In addition to the book management in the library, it is also responsible for publishing the Everwide Chemical Electronic Newsletter, the compilation of various technical materials and catalogs, and the unified summary of all paper documents. As for the electronic files of related documents and information. "MIS? My computer is a bit weird. Could you please come and take a look?" We have computer engineers with the best service attitude, managing the 38 computers used in word processing, instruments, printers, and the internet. In addition to the peripheral equipment, the graphs and data of the instrument are collected into a huge computer database system, which is convenient for the internal sharing of applications. In addition, our website is also constantly updated. You can browse photos, download e-news, and inquire about product information on our official website. You are welcome to go there when accessible, and you will indeed find surprises.
Knowledge § Reaction mechanism of epoxy resin and phenols
As shown in the figure above, the unshared electron pairs on the tertiary amine will first deprive the phenolic active hydrogen, causing the oxygen atom on the phenolic group to be negatively charged, and then react with the α carbon atom on the epoxy resin to cause the epoxy resin. It causes the ring-opening reaction of the epoxy resin, and a new hydroxyl group is produced simultaneously.
Living § Doctoral classification (part 2)
As far as general social perception is concerned, a doctoral degree in a profession must know a lot more than a master's degree. This view has created immense pressure on PhDs, especially PhDs who have entered the industry and lost their academic protection. For example, two 30-year-old young people may have just graduated with a doctorate and are looking for their first job; those with a master's degree may have four or five years of work experience. If these two people happen to work in the same company, a master's degree is likely better than a doctor's job. The embarrassing thing is that the "small doctor" is given a title on the first day of work at the company and may even get a high salary. If the boss finds that "a doctor is not as good as a master," then it's worth it? Active "small doctor" immediately burned the sundial, worked hard, and made a great effort to reduce this practical gap in the shortest possible time, and then gave full play to the talents that others did not have, step by step to establish a "middle doctor" demeanor. If the "small doctor" misjudged the situation and didn't hurry up and study it, it would not be long before he was listed as a "doctor who is not as good as a master's degree" by his colleagues around him. The doctor's reputation would be reimbursed from then on. In retrospect, the "doctoral classification" invented by my younger brother can also provide good points of view when used in other places, such as: "Masters who are not as good as bachelors," "Seniors who are not as good as students," and "Ministers who are not as good as section chiefs," "Official staff who are not as good as temporary employees," etc. This classification tells us the illusion of relying on the old and selling the old and the need for lifelong learning. Remarks: This article started in 2007 and stopped until it was finished today.
─Author: Dr. Ming-xu, Li, R&D Engineer, Everwide Chemical
Comments