부산대학교 도서관

In this study, the effect of one polymer as a component of blends and the role of polymeric additive in polyphenylene ether (PPE)/crystalline polymer blends was studied. The role of processing aids for improving processability using each different viscoelasticity was identified and the compatibility of blends was established via reactive compatibilizer, and new compatibilizer was prepared to improve the compatibility in the PPE/Nylon66 blends. In addition, the impact property of blends was improved by impact modifier significantly. Eco-friendly flame retardancy of V0 grade via polymeric flame retardant effect including incorporation of the halogen-free flame retardant was established. Furthermore, eco-friendly flame retardancy blends were established using polymeric flame retardant without halogen-free flame retardant.In the study of Nylon66/PPE/HIPS (high impact polystyrene) blends, PPE and HIIPS were used as polymer additives to improve processability. Styrene-maleic anhydride (SMA) and styrene-ethylene-butylene-styrene block copolymer grafted with maleic anhydride (SEBS-MAH) were selected as the most effective compatibilizer providing the blends with relatively high impact strength at the least sacrifice of tensile strength. Halogen free flame retardant, there existed a critical concentration (15 phr) of phosphinate where the flame retardancy of the blends are little affected by further addition. Next, PPE/Nylon66 blends were investigated with new compatibilizer. PPE grafted with fumaric acid (PPE-g-FA) was employed as a new compatibilizer and Nylon66 was used as a processability modifier. In addition, styrene-ethylene-butylene-styrene block copolymer (SEBS) was used as an impact modifier to improve the impact property. Following the previous research, the composition of the blends was fixed at weight ratio of 60/40 via increasing PPE contents. V0 grade and high mechanical toughness were achieved at the contents of 5 phr phosphinate. Finally, the study of PPE/PPS (polyphenylene sulfide) blends were conducted. PPS was used as a polymeric additive to improve the processability. We determined that the SEBS-g-MAH not only acted as a compatibilizer but also effected as an impact modifier. As SEBS-g-MAH was added up to 20 phr, the flame retardancy was predicted to be deteriorated but V0 grade was obtained with no flame retardant. In addition, PPE/PPS blends showed the good processability and mechanical properties by using PPS and SEBS-g-MAH.