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Abstract
The mobility of spin probes having an amide group in dried nylon films was investigated by means of an electron spin resonance (e.s.r.) technique. The results for 4-acetylamino-2,2,6,6-tetramethyl-1-piperidinyloxy (SPVII) and 4-benzoylamino-2,2,6,6-tetramethyl-1-piperidinyloxy (SPVIII) were compared with that for 4-(( p-phenylazobenzoyl)amino)-2,2,6,6-tetramethyl-1-piperidinyloxy (SPI) examined previously. The mobility of all the spin probes increased with increasing methylene chain length of the nylon, and a small effect of drawing was observed. The mobility of SPVII was a little lower than that of SPI, whereas SPVIII gave the same mobility as SPI. From this, it was concluded that the mobility of spin probes having an amide group was affected by interactions between the amide group of the probe molecules and the nylons rather than by the molecular volumes of the spin probes.
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