The effect of the degree of branching(DB) on glass transition temperature(T g) for a hyperbranced poly[3-ethyl-3-(hydroxymethyl)oxetane](PEHO) was measured by DSC. The results show that the T g of PEHO decreases with ...The effect of the degree of branching(DB) on glass transition temperature(T g) for a hyperbranced poly[3-ethyl-3-(hydroxymethyl)oxetane](PEHO) was measured by DSC. The results show that the T g of PEHO decreases with the increasing DB. It is presumed that the smaller the DB of the PEHO sample, the smaller the free volume of the material, and the stronger the intermolecular interaction, which means more energy is needed to make the PEHO chains move, finally it leads to the increase of T g.展开更多
文摘The effect of the degree of branching(DB) on glass transition temperature(T g) for a hyperbranced poly[3-ethyl-3-(hydroxymethyl)oxetane](PEHO) was measured by DSC. The results show that the T g of PEHO decreases with the increasing DB. It is presumed that the smaller the DB of the PEHO sample, the smaller the free volume of the material, and the stronger the intermolecular interaction, which means more energy is needed to make the PEHO chains move, finally it leads to the increase of T g.
