YANG Rong-jie, LI Xuan, YE Mei-ling, SHI Liang-he. DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT[J]. Acta Polymerica Sinica, 1991,(5):572-576.
YANG Rong-jie, LI Xuan, YE Mei-ling, SHI Liang-he. DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT[J]. Acta Polymerica Sinica, 1991,(5):572-576.DOI:
SBS molecules can micellize in methylethyl ketone (MEK) under certain conditions. But the behavior of micellization was found to be instable. In this paper
GPC
IR
ultracentrifuga-tion and viscometry were used to study the instability. It was pointed out that SBS molecules were degradated in MEK solvent when solution was stored in air for a long time. The reason is that ketone is easy to yield free radicals by ultra-violet ray and the free radicals accelerate oxidation and degradation of double bond C=C of PB block in the SBS molecules.