本研究首先探討聚丙烯型改質聚醯胺(MPAy)/奈米尼龍黏土(NYC)共混物(MPAyNYC)系列吹膜樣品阻隔氧氣性能，進而以最適化聚醯胺/奈米尼龍黏土共混物(MPAy12NYC1)摻混不同比例乙烯乙烯醇共聚物(EVOH)，製備與探討MPAyNYC / EVOH共混物(MPAy12NYC1)xEVOHy系列吹膜樣品之最適化阻隔配方與機理。 相對於PE薄膜樣品，在25 ℃ / 65 %相對溼度下，MPAy及NYC薄膜樣品的氧氣滲透速率明顯慢了許多，其阻隔氧氣滲透速率已較PE薄膜改善約31.4及34.9倍；而EVOH薄膜樣品之阻隔氧氣滲透性質在所有基材塑膠中為最佳，其阻隔氧氣滲透性質已較PE薄膜改善 16133.3倍。而令人驚訝的是，在25 ℃ / 各相對溼度下，MPAyNYC系列薄膜樣品之氧氣滲透速率竟然均低於原先MPAy及NYC薄膜樣品之數值； 而且隨 MPAyNYC系列薄膜樣品內之MPAy與NYC達12:1之最適化比例時其氧氣滲透速率將至最低。另一方面， 添加過EVOH的(MPAy12NYC1)xEVOHy系列薄膜樣品在各相對濕度下的氧氣滲透速率基本上均小於原先對應於MPAy12NYC1薄膜樣品的氧氣滲透速率。 而且當其內MPAy12NYC1與EVOH的重量比達4:1時，其氧氣滲透速率達到最低。 比如，在65%相對濕度下，(MPAy12NYC1)4EVOH1薄膜樣品的氧氣滲透速率僅及7.7 (25μm • cm3 / m2 • day • atm)而已；相較於PE薄膜樣品其氧氣阻隔改善倍率已達約628倍。而相較於EVOH薄膜樣品，MPAyNYC 及(MPAy12NYC1)xEVOHy系列薄膜樣品之氧氣滲透速率雖隨其相對濕度增加而持續增加；但其增加之幅度明顯小於EVOH薄膜樣品。 為瞭解這些有趣之氧氣滲透阻隔性質，上述吹膜樣品之斷面型態、FT-IR、流變、廣角X光繞射、熱學性質、自由體積特性均在本文中被探討。

An investigation of the oxygen barrier properties of the modified polyamide and nylon clay (MPAyNYC) compound and blow the films is reported first, and blends with different percentage of EVOH in optimization conditions MPA12NYC1 to produce MPAyNYCEVOH barrier resins and blow the films, preparation and discussed the optimization of composition and mechanism of the (MPAy12NYC1)x EVOHy series films. Relative to PE membrane sample, at 25℃ / 65% relative humidity, the oxygen permeation rate was slowly obvious, and that is improved 31.4 and 34.9 times than PE specimen. EVOH specimen is the best result of whole matrix plastic of oxygen barrier properties, the oxygen barrier properties is improved 16133.3 times than PE specimen. An astonishing phenomenon, at 25℃ / every relative humidity, the oxygen permeation rate of MPAyNYC series films is lower than those MPAy and NYC membrane. Moreover, this improvement in oxygen permeation rate reach the best as the MPA contents present in MPAyNYC approach the 12:1 optimum weight ratio of MPA to NYC. On the other hand, the oxygen permeation rate of (MPAy12NYC1)xEVOHy specimen slower than those MPAy12NYC1 specimen, at every relative humidity. The oxygen permeation rate reach lowest as the weight ratio of MPAy12NYC1 to EVOH reached about 4:1. For instance, at 65% relative humidity, the oxygen permeation rate of (MPAy12NYC1)4EVOH1 is about 7.7 (25μm • cm3 / m2 • day • atm), which yield about 628 times oxygen barrier improvements better than that of the PE specimen. Relatively to EVOH specimen, although the oxygen permeation rate increase gradually as relative humidity increase that of the MPAyNYC and (MPAy12NYC1)x EVOHy series specimen, but the range of increased is to be smaller than EVOH specimen. To realize these interesting oxygen permeation barrier mechanisms, the morphology, FT-IR, rheological behavior, wide-angle X-ray diffraction patterns, thermal properties and characteristic of free volume have been every discussed in this paper.

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