PDF(Pubmed)
Abstract：
We have evaluated the effectiveness of compatibilizers in blends and composites produced using a solvent manufacturing process. The compatibilizers were two different types of polyethylene (linear low-density and high-density) grafted with maleic anhydride (MAH) and a highly functionalized, epoxy-based compatibilizer with the tradename Joncryl. The selected material combinations were an ultra-high-molecular-weight polyethylene (UHMWPE) with MAH-based materials as compatibilizers and a polyphenylene sulfide plus polytetrafluoroethylene (PPS-PTFE) polymer blend with an epoxy-based compatibilizer. The findings revealed that while the compatibilizers consistently enhanced the properties, such as the impact strength and hardness of PPS-based compositions, their utility is constrained to less complex compositions, such as fibrous-reinforced PPS or PPS-PTFE polymer blends. For fibrous-reinforced PPS-PTFE composites, the improvement in performance does not justify the presence of compatibilizers. In contrast, for UHMWPE compositions, compatibilizers demonstrated negligible or even detrimental effects, particularly in reinforced UHMWPE. Overall, the epoxy-based compatibilizer Joncryl stands out as the only effective option for enhancing mechanical performance. Thermal and chemical characterization indicated that the compatibilizers function as chain extenders and enhance the fiber-matrix interface in PPS-based compositions, while they remain inactive in UHMWPE-based compositions. Ultimately, the incompatibility of the compatibilizers with certain aspects of the manufacturing method and the inconsistent integration with the polymer are the main reasons for their ineffectiveness in UHMWPE compositions.
摘要：
我们已经评估了相容剂在使用溶剂制造工艺生产的共混物和复合材料中的有效性。相容剂是用马来酸酐(MAH)接枝的两种不同类型的聚乙烯(线性低密度和高密度)和高度官能化的聚乙烯,环氧基增容剂，商品名为Joncryl。所选择的材料组合是具有MAH基材料作为增容剂的超高分子量聚乙烯(UHMWPE)和具有环氧基增容剂的聚苯硫醚加聚四氟乙烯(PPS-PTFE)聚合物共混物。研究结果表明，虽然增容剂始终如一地增强了性能，例如基于PPS的组合物的冲击强度和硬度，它们的效用受限于不太复杂的成分，如纤维增强PPS或PPS-PTFE聚合物共混物。对于纤维增强的PPS-PTFE复合材料，性能的改善并不能证明增容剂的存在是合理的。相比之下,对于UHMWPE组合物，增容剂表现出微不足道甚至有害的影响，特别是在加强UHMWPE。总的来说,环氧基增容剂Joncryl是提高机械性能的唯一有效选择。热和化学表征表明，增容剂充当扩链剂并增强基于PPS的组合物中的纤维-基质界面，而它们在基于UHMWPE的组合物中保持非活性。最终,增容剂与制造方法的某些方面的不相容性以及与聚合物的不一致的整合是它们在UHMWPE组合物中无效的主要原因。
