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OSCILLATING DIFFERENTIAL SCANNING CALORIMETRY

W.J. Sichina, N. Nakamura, Oscillating Differential Scanning Calorimetry Software. Seiko Instr. Product Detail 5. [Pg.186]

The preparation of ZnO/ PS nanocomposites preceded as follows [112] First, 110 mg bare ZnO or 110 mg PMMA-grafted ZnO were added into a three-necked bottle. Then, 10 mL styrene was added into the reactor. The mixture was stirred with the aid of ultrasonic oscillation until a uniform dispersion of the ZnO particles in styrene was attained. Afterwards, 36 mg azobisisobutyronitrile (AIBN) was added into the reactor as initiator. The subsequent polymerization was conducted at 85°C for 2.5 h. Then, the obtained composites were dried under vacuum for 24 h. The differential scanning calorimetry (DSC) heating curves of neat PS, PS/ZnO (bare), and PS/ZnO (PMMA grafted) are shown in Fig. 10. DSC traces in Fig. 10a show that neat PS has a lower glass transition temperature (Tg = 87.7°C) than PS/ZnO (bare, 7 g = 97.9°C) and PS/ZnO (PMMA grafted, Tg = 95.3°C). This behavior can be explained by the restricting effect of the nanoparticles in polymer. ZnO... [Pg.24]

The course of conversion has already been photometrically, polarographically and barometrically recorded. The polarographic measurement, almost free of inertia, has revealed a sawtooth-shaped oscillation. Calorimetric investigation has been carried out until now only in micro calorimeters by differential thermal analysis DTA (non-isothermal) and by differential-scanning-calorimetry DSC (quasi-isothermal). The calorimetric inertia of the control systems is too large to enable the system to record correctly sawtooth-shaped oscillations, i.e. relatively abmpt changes in reaction power. The characteristic course can only be distortedly recorded. [Pg.192]


See other pages where OSCILLATING DIFFERENTIAL SCANNING CALORIMETRY is mentioned: [Pg.601]    [Pg.601]    [Pg.601]    [Pg.601]    [Pg.174]    [Pg.88]    [Pg.799]    [Pg.229]    [Pg.213]    [Pg.744]    [Pg.168]    [Pg.442]    [Pg.259]    [Pg.24]    [Pg.260]    [Pg.139]    [Pg.117]    [Pg.255]    [Pg.328]   
See also in sourсe #XX -- [ Pg.7 ]




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OSCILLATING DIFFERENTIAL

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