Data for: Enhanced elastomer toughness and fracture properties imparted by chemically reactive flat nanoparticles

The files named "Fsweep_NAME", where "NAME" refers to NC45, NG45, CB45, CF45-PARL, CF45-PERP, and BASE, contain frequency-sweep dynamic mechanical analysis (DMA) data acquired at 30 °C for the respective elastomers. Measurements were made in the dual-cantilever mode using a strain amplitude of 0.1%.

The files named "Tsweep_NAME" contain temperature-sweep DMA data acquired at a constant heating rate of 3 °C/min, a strain amplitude of 0.1 %, and a strain frequency of 1 Hz.

The files named "TENSILE_NAME" contain stress vs. strain data acquired on dumbbell specimens with a gauge length of 20 mm, a width of 2 mm, and a thickness of 2 mm, at a constant extension rate of 500 mm/min. The files named "CYCLIC_TENSILE_NAME" contain stress vs. strain data for these specimens using a triangular strain waveform, consisting of loading and unloading of the dumbbell specimen at a constant displacement rate of 50 mm/min. All the tensile testing data were acquired at room temperature.

The files named "LOAD_DISP_NAME" contain normalized load vs. displacement data acquired on SENT specimens, as discussed in ref. 1. The load is normalized by the initial area of the uncracked ligament. The files named "R_CURVE_SENT_NAME" contain R-curve data for the SENT specimens. The normalized strain energy is obtained by dividing the strain energy, U, by the initial area of the uncracked ligament. All the fracture testing data were acquired at room temperature.

Reference:
1. M. Torabizadeh, Z.A. Putnam, M. Sankarasubramanian, J.C. Moosbrugger, S. Krishnan, The effects of initial crack length on fracture characterization of rubbers using the j-integral approach, Polymer Testing, 73 (2019) 327-337.

名为"Fsweep_NAME"的文件（其中"NAME"指代NC45、NG45、CB45、CF45-PARL、CF45-PERP及BASE），存储了对应各弹性体在30℃条件下采集的频率扫描动态力学分析（dynamic mechanical analysis, DMA）数据。测试采用双悬臂梁模式，应变幅值设置为0.1%。

名为"Tsweep_NAME"的文件，存储了以3℃/min的恒定升温速率、0.1%的应变幅值及1Hz的应变频率采集的温度扫描动态力学分析数据。

名为"TENSILE_NAME"的文件，存储了哑铃状试样的应力-应变数据。该试样标距长度为20 mm、宽度2 mm、厚度2 mm，测试时采用500 mm/min的恒定拉伸速率。名为"CYCLIC_TENSILE_NAME"的文件则存储了该类试样的循环应力-应变数据，其采用三角波应变波形，以50 mm/min的恒定位移速率完成哑铃试样的加载与卸载流程。所有拉伸测试数据均在室温下采集。

名为"LOAD_DISP_NAME"的文件，存储了单边切口拉伸（single-edge notched tension, SENT）试样的归一化载荷-位移数据，具体细节参见参考文献1。载荷以未开裂韧带的初始截面积进行归一化处理。名为"R_CURVE_SENT_NAME"的文件，存储了SENT试样的阻力曲线（R-curve）数据。归一化应变能通过将应变能U除以未开裂韧带的初始截面积计算得到。所有断裂测试数据均在室温下采集。

参考文献：
1. M. Torabizadeh, Z.A. Putnam, M. Sankarasubramanian, J.C. Moosbrugger, S. Krishnan, 《初始裂纹长度对基于J积分法（J-integral approach）的橡胶断裂表征的影响》，《聚合物测试》（Polymer Testing），73 (2019) 327-337。