If you want your boss to see you as a hard-working and serious about your job, then you need to dress professionally. If you come into work wearing a clown costume, your coworkers will likely laugh at you and not take you seriously. However, your colleagues will respect and listen to you while you are wearing professional attire. You will also want others to know you are serious about your job, especially when you meet important people. All workers should be required to dress appropriately for their job.
On the other hand, some people believe a dress code is not necessary for chemical engineering. You could argue that it will help with creativity and work performance. You could also have your own style if there was no dress code. One of the biggest arguments against dress codes is that chemical engineers sit for extended periods of time, they need to wear whatever makes them comfortable. Is it worth risking your health just to be comfortable and express your