Effect of PMR‐POI on the melt behavior and isothermal crystallization of poly(phenylene sulfide)

Abstract

ABSTRACT:The crystallization behavior of neat PPS and PPS in blends with PMR-POI prepared by melt mixing were investigated by differential scanning calorimetry (DSC). It was found that POI was an effective nucleation agent of the crystallization for PPS. The enthalpy of crystallization of PPS in the blends increased compared with that of neat PPS. During isothermal crystallization from melt, the dependence of relative degree of crystallinity on time was described by the Avrami equation. It has been shown that the addition of POI causes an increase in the overall crystallization rate of PPS; it also changed the mechanism of nucleation of the PHB crystals from homogeneous nucleation to heterogeneous nucleation. The equilibrium melting temperature of PPS and PPS/POI blends were determined. The analysis of kinetic data according to nucleation theories shows that the increase in crystallization rate of PPS in the composite is due to the decrease in surface energy of the extremity surface. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 436 -442, 2002

Influence of Thermal Cross‐Linking Temperature on the Crystallization Behavior of Poly(phenylene sulfide)

“…Poly(phenylene sulfide) (PPS) is one of the most important thermoplastic engineering polymers because of exhibiting excellent thermal stability, chemical resistance, and flame resistance. These literatures mainly focus on the crystallization morphology of PPS in quiescent condition [3][4][5][6][7][8][9][10][11][12] or in shear condition, [13][14][15] the PPS/other polymers or fillers composites, [16][17][18][19][20][21][22] the relation between molecular structure and crystallization behavior, 23,24 the crystallization kinetics, [25][26][27][28][29][30] and the influence of crystallinity on properties. 2 The transcendent properties of PPS greatly depend on its unique structure especially on its crystallizability.…”

“…The transcendent properties of PPS greatly depend on its unique structure especially on its crystallizability. Therefore, numerous studies have been undertaken to investigate the crystallization behavior of PPS . These literatures mainly focus on the crystallization morphology of PPS in quiescent condition or in shear condition, the PPS/other polymers or fillers composites, the relation between molecular structure and crystallization behavior, the crystallization kinetics, and the influence of crystallinity on properties …”