PLA info
PLA4043D datasheet
http://ultimachine.com/sites/default/files/4043D_GP-Films.pdf
For more details, visit the RepRap.org PLA page here.
Our old blog post with information about PLA here.
I have a friend that I think can access this from the IEEE archive;
Electrical properties of biodegradable polylactic acid film
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?reload=true&arnumber=1315793
Don't know what that will contribute...