Data for: Increasing the incorporation of recycled PET on polymeric blends through the reinforcement with commercial nanoclays

The effect of increasing post-consumer bottle recycled poly (ethylene terephthalate) (RPET) on optical, thermal (DSC and TGA) and mechanical properties of films prepared by extrusion blending of RPET and virgin PET (vPET) was investigated. Furthermore, morphology (XRD and TEM) and physical properties of vPET/RPET nanocomposites prepared with commercial organoclays were studied. Calorimetric and mechanical parameters of the vPET/RPET films without clay were mostly changed at concentrations greater than 80% of RPET. On the other hand, nanocomposites showed a combined intercalated/tactoid morphology. Higher percentages of short RPET chains favored polymer intercalation, increased elastic modulus, and produced a smaller impact on opacity in nanocomposites. Tensile strength was decreased by the formation of tactoid agglomerates. Ductility was increased by the occurrence of the stress oscillation phenomenon (SO) during the tensile test. SO was promoted with the increase of RPET concentration while the presence of clays inhibited it.

本研究考察了提升消费后瓶级回收聚对苯二甲酸乙二醇酯（RPET）的添加比例，对通过RPET与原生PET（vPET）挤出共混制备的薄膜的光学、热学（差示扫描量热法DSC、热重分析法TGA）及力学性能的影响。此外，还探究了采用商用有机粘土制备的vPET/RPET纳米复合材料的形貌（经X射线衍射XRD、透射电子显微镜TEM表征）与物理性能。未添加粘土的vPET/RPET薄膜的量热与力学参数，在RPET浓度高于80%时发生显著变化。该纳米复合材料整体呈现插层/tactoid复合形貌。更高占比的短RPET链可促进聚合物插层过程，提升材料弹性模量，并使纳米复合材料的不透明度受影响更小。tactoid团聚体的形成则会降低材料的拉伸强度。拉伸测试中出现的应力振荡现象（SO）可提升材料的延展性：RPET浓度升高会促进该现象的发生，而粘土的存在则会抑制这一现象。