COMPATIBLIZED POLYPHENYLENE SULFIDE/LIQUID CRYSTAL POLYMER ALLOY FOR ELECTRICALELECTRONIC APPLICATIONS

摘要

The combination of polyphenylene sulfide (PPS) and liquid crystal polymer (LCP) in polymer blend is a potential way of creating new polymer properties. However, the two polymers are incompatible, and typical physical blends do not realize synergistic performance. Herein we report a compatiblized PPS/LCP alloy. Morphology and thermal analysis confirm the improved compatibility of PPS and LCP. As a result, mechanical properties of the compatiblized PPS/LCP alloy are improved. In particular, the notched Izod impact improves by 45% and weld line strength improves by 37% compared to PPS/LCP physical blend. The surface quality as measured by surface gloss of the compatiblized alloy is also improved significantly. In addition, the compatiblized PPS/LCP alloy is halogen free according to IEC 61249-2-21 standard and meets V-0 flammability of the UL-94 standard. Such compatiblized PPS/LCP alloy is an ideal material for electronics applications such as connectors and printer parts.