Properties of polyethylene terephthalate (PET) and polypropylene (PP) can be enhanced by blending both in a specific proportion to get combined superior properties. To make a homogeneous blend, maleic anhydride functionalized PP (PP-g-MAH) was used as a compatibilizer in 60% PET blends. In all blends, PET’s percentage crystallinity was reduced as compared to pure PET because there were hindrances in chains packing because of the presence of PP chains. The addition of compatibilizer in PET and PP blend enhanced interactions resulted in a homogeneous blend with fewer voids. 2.5% of PP-g-MAH was observed to be the optimum value of compatibilizer in the blend of PET and PP. The decrease in free space inside the blend hindered water molecules' passage through the sheets. Owing to this, water vapor permeability of the blend was less compared to pure PET. The addition of the nonpolar PP also influenced the water transmittance rate of blended sheets.

聚对苯二甲酸乙二醇酯（PET）和聚丙烯（PP）的性能可以通过以特定比例混合以得到综合的优异性能来增强。为了制备均匀的共混物，将马来酸酐官能化的PP（PP-g-MAH）用作60％PET共混物中的增容剂。在所有混合物中，与纯PET相比，PET的结晶度百分比降低了，因为存在PP链，从而阻碍了链的堆积。在PET和PP共混物中添加增容剂可增强相互作用，从而形成具有较少空隙的均质共混物。在PET和PP的混合物中，发现2.5％的PP-g-MAH是增容剂的最佳值。混合物内部自由空间的减少阻碍了水分子通过薄层。由于这个，与纯PET相比，共混物的水蒸气渗透性较小。非极性PP的添加也影响了共混片材的透水率。