So you have done or were interested in my first instructable on potato plastic
and now your looking for something that will yield better results and a little more danger, well here it is. First and foremost I strongly recommend that you approach this project only if you are willing to accept some safety rules, and I will go over those in another step. The basic premise behind making a starch based plastic is to get a starch crammed full of polymers and nothing else, as impurities would detract from the strength properties we want. To do this we are going to have to enter into the realm of modified food starches. For this instructable we will be using a starch that has been modified to have an amylose content of 70% as opposed to the normal 20% found in most starches. The product is called Hylon VII from National Starch Food Innovation. The reason we want a high amylose content is because amylose is "is a planar polymer of glucose linked mainly by hydrogen bonds. It can be made of several thousand glucose units. It is one of the two components of starch, the other being amylopectin". So basically it makes really long polymer chains (good), and if you don't fully understand this go check out my first instructable on Potato Plastic. There is a catch 22 however that puts us in quite a pickle metaphorically speaking, go to step 1 to discover this conundrum.
Heres a video of me doing some strength tests of thick and film-like pieces of my awesome plastic