Influence of a nucleating agent on the crystallization behaviour of isotactic polypropylene and elastomer blends

Synergistic toughening effects of nucleating agent and ethylene–octene copolymer on polypropylene

“…33 The crystallization of PP in PP/POE blends maybe take place in the presence of the octene microdomain structure. 37 On the other hand, the good compatibility between PP and POE maybe decrease the nucleation activity energy of PP, which results more PP nuclei formation during the crystallization process. Further work should be done to understand the nucleation effect of POE on PP.…”

Morphology, structure and mechanical properties of polypropylene modified with organophilic montmorillonite

“…Besides the modification on mechanical properties due to the reinforcement by the clay nanolayers, there is an important aspect to be studied: the influence of the nanolayers on the crystallinity of the PP that can, by itself play a role on the final properties of the nanocomposite. In semicrystalline polymers, the nucleation stage is a critical step on crystallization process and parameters like crystallization rate, degree of crystallinity, morphology and spherulites size directly affect the final physical properties [13][14][15] . The crystallization of iPP (isotactic polypropylene) is controlled by the nucleation stage, and the addition of nucleating agents to shorten the induction time of crystallization and accelerate the formation of crystalline nuclei is a technique commonly used in the polymer industry to decrease injection-molding cycle times [13] .…”

“…In semicrystalline polymers, the nucleation stage is a critical step on crystallization process and parameters like crystallization rate, degree of crystallinity, morphology and spherulites size directly affect the final physical properties [13][14][15] . The crystallization of iPP (isotactic polypropylene) is controlled by the nucleation stage, and the addition of nucleating agents to shorten the induction time of crystallization and accelerate the formation of crystalline nuclei is a technique commonly used in the polymer industry to decrease injection-molding cycle times [13] . Furthermore, the agents also generate smaller spherulites and increase crystallinity, thus improving the optical and mechanical properties [13,15] .…”

“…The crystallization of iPP (isotactic polypropylene) is controlled by the nucleation stage, and the addition of nucleating agents to shorten the induction time of crystallization and accelerate the formation of crystalline nuclei is a technique commonly used in the polymer industry to decrease injection-molding cycle times [13] . Furthermore, the agents also generate smaller spherulites and increase crystallinity, thus improving the optical and mechanical properties [13,15] . Lv et al [16] prepared polypropylene composites with organically modified zeolite.…”

“…The nonisothermal crystallization behavior of nylon6(PA6)/attapulgite (AT) composites was studied by Shi et al [17] using differential scanning calorimetry, which indicated that AT nano-particles acted as nucleating agents during the crystallization of PA6/AT blends. Several authors present results based on PP crystallization process [13,[18][19][20][21][22] . The nucleating effect of nanoparticules of montmorilonite on crystallization process of systems based on PP + PP-g-MA (maleic anhydride grafted polypropylene) has been studied by Maiti et al [23] , and they related the decrease of spherulite size with increasing clay content which indicates that clay particles act as nucleating agents.…”