Abstract
The wide-line proton magnetic resonance of poly(γ-benzyl glutamate) (PBG) was studied using two deuterated samples. One was deuterated at the phenyl groups, PBG-d5, and the other, at the benzyl groups, PBG-d7. The temperature dependence of the line width and the second moment was compared with that for PBG. It was found that the use of these deuterated samples made it possible to identify the particular part of the side chain participating in the molecular motion. The results indicated that in PBG, the side chain motion is excited first at the end group and then propagates to the backbone with rise in temperature, in agreement with our previous interpretation. An attempt was made to decompose the second moment of PBG into several components.
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