See Master in Polymer Science comes under the genre of the Engineering Sciences. As per most of the universities, the admission to this courses are provided on the basis of the XE or Engineering Science paper of GATE.

Now if you go for the course of the MTech Chemical Engineering then also you can specialize in the following fields:

• Chemical Engineering
• Energy Engineering
• Process Control & Instrumentation
• Biotechnology
• Chemical Process Design
• Chemical Plant Design
• Industrial Pollution Control
• Industrial Biotechnology
• Computer Aided Process and Equipment Design
• Polymer

So yeah! You are also eligible for the Polymer Science through the Masters in Polymer Sciences.

To know more about the GATE CHEMICAL ENGINEERING preparation tips, visit the link below:

https://engineering.careers360.com/articles/how-prepare-for-gate-chemical-engineering

To know more about the Polymer Science visit the link below:

https://www.careers360.com/courses/polymer-science-course

I hope this answer helps. All the very best for your future endeavors!