Effect of TMB-5 on dispersion of MWCNTs in iPP and crystallization of β-nucleated iPP/MWCNTs composites

Structure evolution upon heating and cooling and its effects on nucleation performance: A review on aromatic amide β‐nucleating agents for isotactic polypropylene

“…The former is a product of New Japan Chemical Company and its chemical composition is DCNDCA, and the latter is produced by Shanxi Provincial Institute of Chemical Industry (China). It should be noted that for the product of TMB‐5, in some literature its chemical composition is reported as DCNDCA but in some others reported as DCHT . According to our investigation, the main component of TMB‐5 is DCHT.…”

“…Currently, most studies about the effect of NA concentrations or processing temperature on the structure evolution of NAs were carried out in a simple iPP/NA binary system and under the quiescent conditions. However, in practical processing, some other factors also have influences on the aggregation behaviors of NAs, to name a few, changes in processing conditions, or the addition of substances that interacted with NAs . Nie et al reported that compared to the normal processing conditions, the self‐assembly of TMB‐5 could occur at a lower temperature by injecting supercritical carbon dioxide (scCO 2 ) into iPP/TMB‐5 samples.…”

“…Therefore, each NA granules could maintain its original position as well as shape, and interconnected to form a dendritic structure during the cooling process. Zou et al introduced multiwall‐carbon‐nanotubes (MWCNTs) into the iPP/TMB‐5 samples, and found MWCNTs have an influence on the self‐assembly morphology of TMB‐5 in iPP melt. When the TMB‐5 entirely dissolved into the matrix at a high temperature, the slim dendritic structure could be found upon cooling for the sample of iPP containing TMB‐5 without MWCNTs, whereas the self‐assembly morphology of TMB‐5 would become needle‐like in the ternary system of iPP/TMB‐5/MWCNTS.…”

In situ synthesis of calcium pimelate as a highly dispersed β‐nucleating agent for improving the crystallization behavior and mechanical properties of isotactic polypropylene

“…At present, there are numerous ways for obtaining β ‐iPP available, including temperature gradient crystallization, isothermal crystallization, shear‐induced crystallization, as well as the addition of β ‐NAs 14–17 . Adding β ‐NAs is the most feasible and convenient method to create high concentration of β ‐iPP by far, resulting in enhanced toughness of iPP 18,19 . There are many multiple types of β ‐NAs have been developed on the market, including organic, inorganic, polymer, and metal salts of tricarboxylic acids, 20–22 and so on.…”

“…[14][15][16][17] Adding β-NAs is the most feasible and convenient method to create high concentration of β-iPP by far, resulting in enhanced toughness of iPP. 18,19 There are many multiple types of β-NAs have been developed on the market, including organic, inorganic, polymer, and metal salts of tricarboxylic acids, [20][21][22] and so on. One of them, CaPi, is an typical representative and is quite effective in creating high amounts of β-NAs, which can considerably increase the toughness of iPP.…”