含铵根离子等规聚丙烯离聚体的合成及性能研究

发布时间：2018-12-07 15:43

【摘要】：合成了一系列高分子量、窄分子量分布且高等规度,含有不同 NR_3~+X~-离子基团含量的聚丙烯离聚体(iPP-NR_3~+X~-).以PP/IUD共聚物作为反应中间体,与三乙胺或N-甲基咪唑氨化得到聚丙烯离聚体.通过离子交换反应制备不同反离子的N-甲基咪唑聚丙烯离聚体,包括双三氟甲基磺酰亚胺根离子(Tf_2N~-)、四氟硼酸根离子(BF_4~-)和六氟磷酸根离子(PF_6~-).热重分析结果发现N-甲基咪唑聚丙烯离聚体的热稳定性明显优于三乙胺聚丙烯离聚体,表明不含β-H的N-甲基咪唑聚丙烯离聚体具有较高的热稳定性.同时,聚丙烯离聚体的表面亲水性得到明显改善.并且,聚丙烯离聚体的断裂伸长率也得到显著提高,最高达到900%.比较不同反离子聚丙烯离聚体的屈服强度和断裂强度发现I~-聚丙烯离聚体具有最优的力学性能.
[Abstract]:A series of polypropylene ionomers (iPP-NR_3~ X-) with high molecular weight, narrow molecular weight distribution and high gauge, and different content of NR_3~ X- ion groups were synthesized. Polypropylene ionomer was prepared by ammoniation of PP/IUD copolymer with triethylamine or N-methyl imidazole. N-methylimidazole ionomers, including bis-trifluoromethyl sulfonimide (Tf_2N~-), were prepared by ion exchange reaction. Tetrafluoroborate ion (BF_4~-) and hexafluorophosphate ion (PF_6~-). Thermogravimetric analysis showed that the thermal stability of N-methylimidazole polypropylene ionomer was better than that of triethylamine polypropylene ionomer, which indicated that N-methylimidazole polypropylene ionomer without 尾 -H had higher thermal stability. At the same time, the surface hydrophilicity of polypropylene ionomer was improved obviously. Moreover, the elongation at break of polypropylene ionomer was also significantly increased, reaching the maximum of 900. The yield strength and fracture strength of different counter-ion polypropylene ionomers were compared. It was found that the ion-polypropylene ionomer had the best mechanical properties.
【作者单位】：天津大学材料科学与工程学院;
【基金】：国家自然科学基金(基金号21234006)资助项目
【分类号】：O632.12

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