de Giraldi A L F M, Bizarria M T M, Silva A A, Mariano C, Velasco J I, d'Avila M A, Mei L H I
Departamento de Tecnologia de Polímeros da Faculdade de Engenharia Química da Unicamp.
J Nanosci Nanotechnol. 2009 Jun;9(6):3883-90. doi: 10.1166/jnn.2009.ns84.
Nanocomposites of recycled poly(ethylene terephthalate) (rPET) containing 2.5 wt% and 5.0 wt% of montmorillonite modified with organophilic quaternary ammonium salt (DELLITE 67G) were prepared by melt compounding using a co-rotating twin-screw type extruder with two organoclay contents were used: 2.5 wt% and 5.0 wt% and were prepared using two different rotation speeds: 150 and 250 rpm. Thermal characterization (analysis) of the nanocomposites was performed using differential scanning calorimetry (DSC) analysis. The results from DSC measurements showed that the addition of organoclay affects recycled PET's crystallization for two screw rotation speeds studies. The nucleating effect of organoclay was investigated. Morphological analysis using Transmission Electron Microscopy (TEM) revealed the presence of fully exfoliated clay platelets in samples prepared at 150 rpm.
通过使用同向旋转双螺杆挤出机进行熔融共混，制备了含有2.5重量%和5.0重量%经亲有机季铵盐（DELLITE 67G）改性的蒙脱石的回收聚对苯二甲酸乙二酯（rPET）纳米复合材料，使用了两种有机粘土含量：2.5重量%和5.0重量%，并以150和250转/分钟两种不同转速进行制备。使用差示扫描量热法（DSC）分析对纳米复合材料进行热表征（分析）。DSC测量结果表明，对于所研究的两种螺杆转速，有机粘土的添加会影响回收PET的结晶。研究了有机粘土的成核作用。使用透射电子显微镜（TEM）进行的形态分析表明，在150转/分钟制备的样品中存在完全剥离的粘土片层。
