Research brings me the measureless joy and pride.- This sounds too emotional to me, I'd say something like 'I derive great satisfaction and pride from research'
continue my research in a higher level- at a higher level
aspiring to become somebody- too colloquial- to become involved...
leave a treasure behind for my country- too strong- build a heritage for my country
I have a couple of reasons- number of reasons
has a long history for more than 100 years- has a history stretching back over a hundred years
magnificent polymer world to which I am aspired- cutting-edge work in the filed of polymers
most attractive researches- research
prick me on exploring- urge me on to explore
I have suggested some alternatives. I would say that this text sounds over the top and too colloquial so I have suggested more formal possibilities.