Compatibilization of Polyester/Polyamide Blends with a Phosphonated Poly(ethylene terephthalate) Ionomer: Comparison of Monovalent and Divalent Pendant Ions
Compatibilization of Polyester/Polyamide Blends with a Phosphonated Poly(ethylene terephthalate) Ionomer: Comparison of Monovalent and Divalent Pendant Ions
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聚酯/聚酰胺共混物与膦酸化聚对苯二甲酸乙二醇酯离聚物的相容性：一价和二价悬垂离子的比较
DOI：
10.1021/acsapm.9b00097
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发表时间：
2019
影响因子：
5
通讯作者：
Moore, Robert B.
中科院分区：
文献类型：
--
作者：
Ju, Lin;Dennis, Joseph M.;Heifferon, Katherine V.;Long, Timothy E.;Moore, Robert B.
以Na+形式的聚对苯二甲酸乙二醇酯离聚体(Na+-PPET)为次要相容剂，成功地实现了不相容无定形聚酯(PETG)与半结晶聚酰胺(MXD6)共混物的增容。采用溶液混合法制备了Na+-PPET/PETG/MXD6共混物，实现了薄膜的表征。用相差光学显微镜(PC-OM)和小角激光光散射(SALS)研究了不同浓度的磷酸化单体的相形态。相分离和相间间距随着磷化单体摩尔分数的增加而减小，这归因于聚酯离聚体上的离子膦酸基与聚酰胺的酰胺键之间的特殊相互作用。还比较了二价膦酸根离子对PETG/MXD6共混物的增容能力，并与传统的磺化聚酯(SPET)相容剂进行了比较。结果表明，与含Na+-μ的共混物相比，Na+-聚对苯二甲酸乙三酯/MXD6共混物需要减少6倍的离子单体才能达到微区尺寸lt；1 MXDm。此外，根据侧链离子的摩尔百分比，PPET中的二价膦酸侧离子对PETG/MXD6共混物的增容效果是SPET中单价磺酸盐侧离子的3倍。
The successful compatibilization of immiscible amorphous polyester (PETG) and semicrystalline polyamide (poly(m-xylylene adipamide) (MXD6)) blends using a phosphonated poly(ethylene terephthalate) ionomer in the Na+form (Na+-PPET) as a minor-component compatibilizer was demonstrated. The Na+-PPET/PETG/MXD6 blends were prepared using a solution mixing method to enable thin film characterization. The phase morphology with respect to various phosphonated monomer concentrations was studied using phase contrast optical microscopy (PC-OM) and small-angle laser light scattering (SALLS). The phase-separated, interdomain spacing decreased with increasing mol % phosphonated monomers and was attributed to the specific interactions between the ionic phosphonate groups on the polyester ionomer and the amide linkages of polyamide. The ability of the divalent phosphonate pendant ions to compatibilize PETG/MXD6 blends was also compared to a conventional sulfonated PET (SPET) compatibilizer. This comparison showed that the Na+-PPET/PETG/MXD6 blends required 6 times fewer ionic monomers to achieve domain dimension <1 μm as compared to Na+-SPET-containing PETG/MXD6 blends. Moreover, on a mole percent of pendant ions basis, the divalent phosphonate pendant ions in PPET were found to be 3 times more effective at compatibilizing PETG/MXD6 blends compared to the monovalent sulfonate pendant ions in SPET.
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