Hong Seo-Hwa, Cho Beom-Gon
Chemical Materials R&D Department, Chassis & Materials Research Laboratory, Korea Automotive Technology Institute, 303 Pungse-ro, Pungse-myeon, Dongnam-gu, Cheonan-si 31214, Republic of Korea.
Polymers (Basel). 2023 Jul 26;15(15):3179. doi: 10.3390/polym15153179.
Poly (phenylene sulfide) (PPS) is a super engineering plastic that has not only excellent rigidity and high chemical resistance but also excellent electrical insulation properties; therefore, it can be applied as an electronic cover or an overheating prevention component. This plastic has been extensively applied in the manufacture of capacitor housing as, in addition to being a functional and lightweight material, it has a safety feature that can block the electrical connection between the electrolyte inside and outside the capacitor. Moreover, the fabrication of PPS composites with high glass fiber (GF) content facilitates the development of lightweight and excellent future materials, which widens the scope of the application of this polymer. However, the crystallinity and mechanical properties of PPS/GF composites have been found to vary depending on the cooling temperature. Although extensive studies have been conducted on the influence of cooling temperature on the crystalline behavior of PPS-based composites, there has been limited research focused particularly on PPS/GF composites for capacitor housing applications. In this study, to apply PPS/GF composites as film capacitor housings, specimens were prepared via injection molding at different cooling temperatures to investigate the composites' tensile, flexural, and impact energy absorption properties resulting in increases in mechanical properties at high cooling mold temperature. Fracture surface analysis was also performed on the fractured specimens after the impact test to confirm the orientation of the GF and the shape of the micropores. Finally, the crystallinity of the composites increased with higher cooling temperatures due to the extended crystallization time.
聚亚苯基硫醚（PPS）是一种超级工程塑料，它不仅具有出色的刚性和高耐化学性，还具有优异的电绝缘性能；因此，它可作为电子外壳或防过热部件应用。这种塑料已广泛应用于电容器外壳的制造，因为它除了是一种功能性且轻质的材料外，还具有能阻断电容器内部和外部电解质之间电连接的安全特性。此外，高玻璃纤维（GF）含量的PPS复合材料的制造有助于开发轻质且优异的未来材料，这拓宽了这种聚合物的应用范围。然而，已发现PPS/GF复合材料的结晶度和机械性能会因冷却温度而异。尽管已经对冷却温度对PPS基复合材料结晶行为的影响进行了广泛研究，但特别针对用于电容器外壳应用的PPS/GF复合材料的研究却很有限。在本研究中，为了将PPS/GF复合材料用作薄膜电容器外壳，通过在不同冷却温度下注塑制备试样，以研究复合材料的拉伸、弯曲和冲击能量吸收性能，结果表明在高冷却模具温度下机械性能有所提高。在冲击试验后还对断裂试样进行了断口表面分析，以确认GF的取向和微孔的形状。最后，由于结晶时间延长，复合材料的结晶度随冷却温度升高而增加。
