To produce a light weight material that is light as plastic but as strong as metal? On the cellar level or molecular or futher to atoms them selves?
Plastic molecules are usually long chain polymers, eg. one unit of say (-CH3=CHO-) repeated constantly. Whereas metals usually dont come as moleculed but as pure elements, sometimes a mix of different metals that are alloys rather than compounds as they dont properly bond. To answer your question you could technically i suppose alloy plastic and metal to form a new substance but as most metal needs to go to over 1000 degrees Celsius to melt and plastic would burn up and turn into gaseous compounds at this temp it would be highly complicated and seriously impractical. Also you never know what properties the final mixture would have.
