Effect of Curing Poly(p-Phenylene Sulfide) on Thermal Properties and Crystalline Morphologies
- Effect of Curing Poly(p-Phenylene Sulfide) on Thermal Properties and Crystalline Morphologies
- 이성호; 김도환; 박재하; 박민; 조한익; 구본철
- Poly(p-Phenylene Sulfide); Thermal Curing; Non-Isothermal Crystallization; Cross-Linking; Crystalline Morphologies
- Issue Date
- Advances in Chemical Engineering and Science
- VOL 3, NO 2, 145-149
- Commercial poly(p-phenylene sulfide) (PPS) was thermally cured, which resulted in an increase of molecular weight due to cross-linking. Non-isothermal crystallization studies of samples cured for up to 7 days at 250°C showed a mo- notonous increase of crystallization temperature compared to pure PPS. However, a further increase of curing time de- creased the crystallization temperature. The change in the half-crystallization time (t1/2) was similar to the crystallization temperature. Thus, the cross-linking of PPS affected crystallization behaviors significantly. To a certain extent, cross- links acted as nucleation agents, but excessive cross-linking hindered the crystallization. Morphologies observed by polarized optical microscopy suggested that thermal curing for as little as 1 day contributed to the spherulitic structure having a smaller size, that was not observed with pure PPS.
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