Hi, hope you are doing well.

In order to do M.Tech in Plastic Engineering, you must qualify in either of these courses: B.E./B.Tech./B.Sc., Engineering (4 years) in Mechanical / Chemical / Production / Polymer / Plastics Engineering / Technology (or) M.Sc. in Polymer Science / Chemistry with Polymer specialization with minimum marks of 60 per cent.

ICT ( Institute of Chemical Technology), Mumbai is a very good college for this course.

For further information on colleges, you may refer to this link:

https://engineering.careers360.com/colleges/list-of-plastic-engineering-colleges-in-mumbai

https://engineering.careers360.com/colleges/list-of-me-mtech-in-plastic-engineering-colleges-in-india

M.Tech in Plastic Engineering is a 2 years course.

Hope this helps.

Best wishes