Characterization, Properties and Applications of Syndiotactic Polystyrene

Yamasaki, Komei; Tomotsu, Norio; Malanga, M.

doi:10.1002/0470867213.ch18

Cited by 4 publications

(1 citation statement)

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“…This is in stark contrast to the behavior of these two materials in crystallization; s-PS crystallizes about hundred times faster than i-PS because of differences in the conformation of the C–C backbone and the work of chain folding. 56 This contrast shows that ageing and crystallization are clearly distinct phenomena.…”

Section: Discussionmentioning

confidence: 98%

Physical Ageing of Polystyrene: Does Tacticity Play a Role?

et al. 2019

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The ageing kinetics of amorphous atactic (a-PS), isotactic (i-PS), and syndiotactic (s-PS) polystyrene were studied by means of flash-differential scanning calorimetry. The specimens were aged for up to 2 h at six different ageing temperatures: the optimum ageing temperature, that is, the temperature at which the enthalpy overshoot at the glass transition is maximal for the given elapsed time, and five ageing temperatures ranging from 20 to 80 K below the optimum ageing temperature. A logarithmic increase of the enthalpy overshoot with ageing time is observed for specimens at their optimum ageing temperatures. For temperatures significantly lower than the optimum, there is a range where the enthalpy overshoot is constant, but for higher temperatures (still below the optimum), a logarithmic increase is also observed. Moreover, the ageing kinetics appear to depend on tacticity, with s-PS and i-PS exhibiting the slowest and fastest ageing kinetics, respectively, and a-PS exhibiting ageing kinetics between these two extremes.

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Section: Discussionmentioning

confidence: 98%

Physical Ageing of Polystyrene: Does Tacticity Play a Role?

et al. 2019

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Applications of Syndiotactic Polystyrene

Fiola¹,

Okada

Mihara

et al. 2009

Syndiotactic Polystyrene

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Syndiotactic polystyrene: Process and applications

Schellenberg

Leder

2006

Adv Polym Technol

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ABSTRACT:In this review, a summary is provided of the manufacturing process for syndiotactic polystyrene together with an overview of applications of syndiotactic polystyrenes, including selected examples of typical applications. The manufacturing process of syndiotactic polystyrene, consists of several basic sections: catalyst premix preparation, monomer treatment, polymerization reaction using a powder bed reactor together with an evaporative cooling system, devolatilization and extrusion, and finally finishing, including cooling and crystallization of the strands. This process is suitable for providing a wide range of syndiotactic polystyrenes comprising homopolymers, with a broad range of melt flow rates as well as copolymers of various comonomer contents, leading to products with various melting temperatures. Essential relationships and correlations of the separate process stages are demonstrated, in addition to useful analytical methods to control the process. These polymers' unique combination of heat resistance, chemical resistance, and electrical properties has led to their successful application in automotive, electrical and electronics, consumer and industrial uses.

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Characterization, Properties and Applications of Syndiotactic Polystyrene

Cited by 4 publications

References 0 publications

Physical Ageing of Polystyrene: Does Tacticity Play a Role?

Physical Ageing of Polystyrene: Does Tacticity Play a Role?

Applications of Syndiotactic Polystyrene

Syndiotactic polystyrene: Process and applications

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