A new type of magnetoplastic effects in polymers is revealed. This effect c
annot be explained by the reorientation of macromolecular units that posses
s a magnetic susceptibility anisotropy. It is shown that the joint action o
f magnetic and electric fields and the rotational mobility of side groups i
n macromolecules are factors of crucial importance in changing the plastici
ty of polymers in pulsed magnetic fields. (C) 2001 MAIK "Nauka/Interperiodi
ca".