Thermo‐optical and differential scanning calorimetric observations of mobility transitions in polystyrene‐poly(2,6‐dimethyl‐1,4‐phenylene oxide) blends
Thermo‐optical and differential scanning calorimetric observations of mobility transitions in polystyrene‐poly(2,6‐dimethyl‐1,4‐phenylene oxide) blends
复制标题
聚苯乙烯-聚(2,6-二甲基-1,4-苯醚)共混物中迁移率转变的热光和差示扫描量热观察
DOI：
10.1002/app.1972.070160216
复制
发表时间：
1972
期刊：
影响因子：
--
通讯作者：
B. Gendron
中科院分区：
文献类型：
--
作者：
A. R. Shultz;B. Gendron
用热光分析法（TOA）和差示扫描量热法（DSC）测定了聚苯乙烯（PS）、聚（2，6-二甲基-1，4-苯醚）（PPO树脂）和这些聚合物的9种均匀共混物的薄膜的转变温度。TOA程序包括在交叉（90°）平面偏振器之间的显微镜热台中以恒定速率加热期间自动监测通过膜中双折射划痕的光透射。TTOA转变温度（定义为划痕中双折射消失的温度）在10°/min的加热速率下从纯PS的113°C单调增加到纯PPO树脂的222°C。在20°/min加热速率下，Tg（DSC）类似地在99°C至212°C的范围内。所描述的TOA技术应该是一个有用的除了透明聚合物和聚合物共混物的热机械研究。
Transition temperatures by thermo-optical analysis (TOA) and by DSC were measured on films of polystyrene (PS), poly(2,6-dimethyl-1,4-phenylene oxide) (PPO resin) and nine homogeneous blends of these polymers. The TOA procedure consists of automatically monitoring light transmission through birefringent scratches in a film during heating at constant rate in a microscope hot stage between crossed (90°) plane polarizers. The TTOA transition temperature, defined as the temperature of birefringence disappearance in the scratches, increased monotonically from 113°C for pure PS to 222°C for pure PPO resin at a 10°/min heating rate. The Tg (DSC) similarly ranged from 99°C to 212°C at a 20°/min heating rate. The TOA technique as described should be a useful addition to thermomechanical studies of transparent polymers and polymer blends.