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利用蒽为基础原料,自制了蒽系列的3种聚丙烯成核剂:9,10-二氢蒽-9,10-桥-α,β-马来酸酐(AMH)、9,10-二氢蒽-9,10-桥-α,β-马来酰肼(AMHD)、9,10-二氢蒽-9,10-桥-α,β-N-甘氨酸基马来酰胺(AGMA)。利用热重分析(TGA)分别考察了三者的热稳定性,采用X射线衍射分析(XRD)和偏光显微镜(PLM)对其所改性等规聚丙烯(iPP)的结晶形态进行了表征,用差示扫描量热法(DSC)研究了其结晶行为,并测试了其力学性能。结果表明,AMHD和AGMA均可增强聚丙烯α晶型成核,而AMH则可诱导β-iPP的生成;3种成核剂都有效提高了聚丙烯的结晶温度(Tc)和结晶度,其中,iPP/AMHD的结晶度(Xc)提高了3.75%;同时改善了iPP的力学性能,与纯iPP试样相比,iPP/AMH抗冲击强度提高了5.60 kJ/m2,iPP/AMHD拉伸强度提高了18.02%,iPP/AGMA的弯曲强度达到53.22 MPa。
Anthracene-based raw materials using anthracene series of three kinds of polypropylene nucleating agent: 9,10-dihydro-anthracene-9,10-bridge-α, β-maleic anhydride (AMH) Anthracene-9,10-bridge-α, β-maleic hydrazide (AMHD), 9,10-dihydroanthracene-9,10-bridge-α, β-N- glycine-based maleimide (AGMA). Thermogravimetric analysis (TGA) was used to investigate the thermal stability of the three samples respectively. The crystalline morphology of the modified iPP was characterized by X-ray diffraction (XRD) and polarized light microscopy (PLM) The crystallization behavior was studied by differential scanning calorimetry (DSC) and its mechanical properties were tested. The results showed that both AMHD and AGMA can enhance the nucleation of α crystal, while AMH can induce the formation of β-iPP. All three nucleating agents effectively increase the crystallization temperature (Tc) and crystallinity of polypropylene , the crystallinity (Xc) of iPP / AMHD increased by 3.75%, while the mechanical properties of iPP were improved. The iPP / AMH impact strength increased by 5.60 kJ / m2 and the tensile strength of iPP / AMHD Increased by 18.02% and the flexural strength of iPP / AGMA reached 53.22 MPa.