Journal ArticleDOI
Effects of an organic phosphorus nucleating agent on crystallization behaviors and mechanical properties of poly(propylene)
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The effects of an organic phosphorus nucleating agent on the crystallization behavior and mechanical properties of poly(propylene) were investigated in this article, where linear equations between the mechanical properties and the logarithmic nucleation density were revealed.Abstract:
The effects of an organic phosphorus nucleating agent on the crystallization behavior and mechanical properties of poly(propylene) were investigated. As the concentration of nucleating agent increased from 0 to 0.8%, the tensile and flexural strengths of the nucleated poly(propylene) resin increased by 15%, the flexural modulus increased by 35%, the crystallization peak temperature increased by 10°C, and the nucleation density (calculated with the nonlinear Voltrra integral equation) increased by 106 times. Mechanical properties increased with nucleation density. Linear equations between the mechanical properties and the logarithmic nucleation density were revealed. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 297–301, 2003read more
Citations
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Effect of in situ prepared silica nano-particles on non-isothermal crystallization of polypropylene
TL;DR: In this paper, the authors studied the non-isothermal crystallization kinetics of PP/silica nanocomposites using a combined Avrami-Ozawa approach and showed a two-stage crystallization process.
Journal ArticleDOI
Effects of organic nucleating agents and zinc oxide nanoparticles on isotactic polypropylene crystallization
TL;DR: In this article, it was shown that the nonisothermal crystallization temperature of isotactic polypropylene increases by an additional 7 °C when an aliphatic triamine is distributed efficiently within the polymeric matrix by coating this nucleating agent onto zinc oxide nanoparticles.
Journal ArticleDOI
The influence of nucleus density on optical properties in nucleated isotactic polypropylene
Alfréd Menyhárd,Alfréd Menyhárd,Markus Gahleitner,József Varga,József Varga,Klaus Bernreitner,Pirjo Jääskeläinen,Harry Oysaed,Béla Pukánszky,Béla Pukánszky +9 more
TL;DR: The effect and efficiency of three nucleating agents, a sorbitol based clarifier, a traditional heterogeneous nucleating agent and poly(vinylcyclohexane) (PVCH) was studied in polypropylene (iPP) homopolymer as mentioned in this paper.
Journal ArticleDOI
Influence of inorganic fullerene‐like WS2 nanoparticles on the thermal behavior of isotactic polypropylene
TL;DR: In this paper, a new family of thermoplastic nanocomposites based on isotactic polypropylene (iPP) and inorganic fullerene-like tungsten disulfide (IF-WS2) has been successfully prepared.
References
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Journal ArticleDOI
The theory of phase transition kinetics with growth site impingement. II. Heterogeneous nucleation
TL;DR: In this article, the authors treated the kinetics of phase transformation for heterogeneous nucleation, where all nuclei are simultaneously initiated, and where initiation follows first-order kinetcs.
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Structures and properties of injection moldings of crystallization nucleator‐added polypropylenes. I. Structure–property relationships
TL;DR: In this paper, the degree of crystalline orientation was measured and structure properties such as flexural modulus, flexural strength, heat distortion temperature, hardness, and mold shrinkage were studied.
Journal ArticleDOI
The Mechanism of Action of Sugar Acetals as Nucleating Agents for Polypropylene
Tammy L. Smith,Divakaran Masilamani,Long Kim Bui,Yash P. Khanna,Robert G. Bray,Willis B. Hammond,Sean Curran,John J. Belles,Shari Binder-Castelli +8 more
TL;DR: In this paper, the authors studied the nucleation of polypropylene via experimental measurements and molecular modeling, and proposed that sugar acetal nucleators stabilize the helical form of polyethylene at the molecular level.