High‐quality modification of general polypropylene by the synergistic effect of zinc adipate, hydrotalcite, and polypropylene (SP179)

Abstract

Owing to its excellent mechanical properties and good fluidity, polypropylene (PP) exhibits widespread applications; however, its unsatisfactory impact resistance hinders its further application. In this study, as a β-nucleating agent, zinc adipate (ZnAA) was produced by the solution method. Next, the notch impact strength, melting index, and tensile strength of isotactic polypropylene (iPP) were adopted as indices, and ZnAA, hydrotalcite (HT), and PP (SP179) were added into iPP to modify it and render high performance. Furthermore, the structure and properties of modified PP were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and differential scanning calorimetry, as well as on an electronic universal material testing machine and a simple-beam impact testing machine. Finally, the nonisothermal crystallization kinetics of modified iPP was investigated by the Caze method. Results revealed that with the increase in the SP179 content to 50%, the maximum values of the notch impact strength and melting index of iPP of 26.01 KJ m À2 and 9.88 g (10 min) À1 , respectively, are achieved, with a tensile strength of 28.22 MPa, and ZnAA, HT, and PP (SP179) have a synergistic effect on iPP modification. These results suggested that modified PP can be applied in more extensive fields, such as fenders, bumpers, and interior parts, with cost-effectiveness.

β-Nucleated Polypropylene: Preparation, Nucleating Efficiency, Composite, and Future Prospects

“…Synergistic materials with β-nucleating agents include MWNTs [ 151 ]; illite [ 56 ]; calcium sulfate whiskers [ 152 ]; nano-silica particles [ 153 , 154 ]; the PA66 used in sandwich-assembly interlayer PP [ 155 ]; TPE/calcium carbonate [ 156 ]; the polyhedral oligomeric silesquioxane (POSS) amide group hydrogen bond reaction [ 157 ]; hydrotalcite (HT) [ 158 ]; and even new nanomaterials such as Mxene [ 159 ]. β-nucleating agents can maintain better performances in the system via their synergistic effect with different materials.…”

Properties of Cellulose/Polypropylene Nanocomposites Modified by KH550 Silane Coupling Agent

“…However, polypropylene has some obvious defects, such as low molecular chain flexibility, low impact strength, low heat distortion temperature, poor heat and oxygen aging resistance, no polar groups on the molecular chain, and high polarity. When molecular polymers or fillers are mixed, it is easy to form an interface, resulting in poor mechanical properties [2] . Nanocellulose is widely used in medicine and cosmetics because of its environmental protection and biodegradability.…”

Effects of nucleating agent content on the microstructure and macroscopic performances of polypropylene analyzed by non‐isothermal crystallization behaviors and isothermal crystallization morphologies

“…[1][2][3][4][5] Thus, regulating the microstructure during the molding process is vital to prepare the PP products to stand out in transparency, impact toughness, rigidity and heat resistance, satisfying the requirements in the applications like domestic appliances, packaging, medical supplies, electronics and automotive industries. 3,4,[6][7][8][9][10][11][12] Besides, PP with controllable crystallization properties is newly applied to alternative materials for potential applications, like redox active sites, organic ligands and bioorganic binders, etc. [13][14][15][16][17][18][19] The crystalline microstructure formed is affected by both the external factors containing temperature and force fields, and the internal factors like molecular chain structure and molecular weight, and so forth.…”

“…1,[22][23][24] Generally, the α phase with a monoclinic structure is the most stable in thermodynamics and easiest to form in processing naturally, contributing to the higher stiffness, while the β phase with a hexagonal structure is not thermodynamically stable and obtained at certain conditions or specific nucleating agent (NA) which can improve the impact strength and heat distortion temperature. 6,22,24 Besides, the polymer crystallization process consists of the formation of primary nuclei and the growth of crystalline grains. 25 And for the homogeneous nucleation inducing crystallization at the relatively stable condition, the crystallization speed is slow corresponding to a long period, due to the long polymeric chains and hierarchical structures.…”