Compatibilization of poly (ethylene terephthalate)/ polypropylene blends via nanostructured silica aerogel

This file contains data as that obtained from theoretical and experimental characterization of synthesized silica aerogel particles and PP/PET binary blends. The specific surface areas and pore structure of hydrophilic and hydrophobic silica aerogel particles were determined using the Nitrogen adsorption analysis (Micromeritics -model TriStar II Plus) and Brunaure–Emmitt–Teller (BET) and Barrett–Joyner–Halendar (BJH) methods. The WAXS patterns for samples were performed using Asenware AW-DX 300 (XRD instrument). X-ray spectrometer was used Cu K_a radiation with a wavelength of 1.54 Å that operated at voltage 40 kV and current 30 mA. The data were obtained from 10 to 90 (2θ) at scan range of 0.05°∙min^(-1). The crystallite size was calculated using Debye-Scherrer analyze based on the following equation in X'Pert High Score Plus software. Rheometric Mechanical Spectrometer (RMS) instrument with parallel plate geometry, 25 mm plate diameter, and 1 mm gap (Physica MCR 501) was used to performing the dynamic rheological experiments on binary blends samples. The oscillatory tests in the linear viscoelastic region were done at a set frequency of 1 Hz and 0.3% strain. The frequency was swept from 0.1 to 100 rad∙s-1. All the measurements were accomplished at 270℃ under the nitrogen atmosphere. The storage and loss modulus data obtained from small-angle oscillatory shear (SAOS) experiments can be expressed as a function of relaxation time spectrum H(λ). The continuous relaxation time spectrum for the PP/PET/silica aerogel samples, which are extracted by Matlab software. The solid-like rheological behavior of the PP/PET filled samples can be described by five-parameter Fractional Zener Model (FZM). By fitting the dynamic modulus equation to the experimental data using the nonlinear least-square in Matlab software, the fitting parameters were obtained.

本文件收录了合成二氧化硅气凝胶颗粒以及PP/PET二元共混物的理论表征与实验表征所得数据。针对亲水与疏水二氧化硅气凝胶颗粒，采用Micromeritics TriStar II Plus型氮气吸附分析仪，结合布鲁瑙尔-埃米特-泰勒（Brunaure–Emmitt–Teller, BET）法与巴雷特-乔伊纳-哈伦达（Barrett–Joyner–Halendar, BJH）法，对其比表面积及孔结构进行测定。样品的广角X射线散射（Wide Angle X-ray Scattering, WAXS）图谱通过Asenware AW-DX 300型X射线衍射仪采集。该X射线光谱仪采用波长为1.54 Å的Cu Kα辐射，工作电压设置为40 kV，电流为30 mA；数据扫描范围为2θ=10°~90°，扫描速率为0.05°·min⁻¹。晶粒尺寸通过X'Pert High Score Plus软件中的谢乐（Debye-Scherrer）分析法，基于下述公式计算得到。采用配备平行板构型（板直径25 mm、间隙1 mm）的Physica MCR 501型流变力学光谱仪（Rheometric Mechanical Spectrometer, RMS），对二元共混物样品开展动态流变实验。在线性粘弹性区域内的振荡测试设定频率为1 Hz、应变为0.3%，频率扫描范围为0.1~100 rad·s⁻¹。所有测试均在270℃的氮气气氛下完成。由小角度振荡剪切（Small-Angle Oscillatory Shear, SAOS）实验获取的储能模量与损耗模量数据，可表示为松弛时间谱H(λ)的函数。PP/PET/二氧化硅气凝胶样品的连续松弛时间谱通过Matlab软件提取得到。填充二氧化硅气凝胶的PP/PET样品的类固体流变行为，可通过五参数分数阶齐纳模型（Fractional Zener Model, FZM）进行描述。借助Matlab软件中的非线性最小二乘法，将动态模量方程拟合至实验数据，即可获得拟合参数。