Bsc in Polymer sci is good choice in DU? and what are scopes in Present time
Masters can also be done , in India you can do MTech in IIT Kharagpur in Rubber technology or Material Science , in IIT Madras , you can try for material science or even in IIT Mumbai or Roorkee or Polymer science in Delhi. After Masters, Raw material manufacturing companies like SABIC can be approached ,such companies offer higher pay . Or you can continue research in IITs .
You efforts and patience in this field shall be required on larger aspect.
Hope this helps.