Hello aspirant,
Glad to learn about your interest.
Bsc polymer is a very good carrier choice. As per your question i learn that you do not want to carry on with masters in the same stream. You want to go ahead with chemistry.
Chemistry has alot of scope both in public as well as in private sector.
It is a two year course.
After msc you can go for:
Teacher
Phd
Biomedical chemist
Quality controller
Chemical manufacturer
Food processing firms
Environmental law
All the best.