polymer structures

Dear CCL'ers
 Could anyone of you send me pointers on calculated structures of EVA
 copolymers, polyalkyl acrylates/methacrylates,  Ethylyne, vinyl acetate,
 isobutylene terpolymers.  Do they exist at all in litera ture?  I did find
 some studies on poly alkyl acrylates but that is all.  What is the best way
 (level of theory, etc) to calculate the structure of a "unit cell" of
 Polyoctadecyl acrylate?
 Thanks in anticipation
 Goutam Das
 Staff Scientist
 BetzDearborn Division of Hercules
 The Woodlands, TX 77380
 281.367.6201 ext 425