Publication: Effect of nano-scaled styrene butadiene rubber based nucleating agent on the thermal, crystallization and physical properties of isotactic polypropylene
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Issued Date
2014
Resource Type
File Type
application/pdf
ISSN
9258388
Other identifier(s)
2-s2.0-84883201460
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Alloys and Compounds. Vol 582, (2014), p.190-195
Suggested Citation
Petchwattana N., Covavisaruch S., Sripanya P. Effect of nano-scaled styrene butadiene rubber based nucleating agent on the thermal, crystallization and physical properties of isotactic polypropylene. Journal of Alloys and Compounds. Vol 582, (2014), p.190-195. doi:10.1016/j.jallcom.2013.08.019 Retrieved from: https://hdl.handle.net/20.500.14740/6279
Author(s)
Abstract
The influence of a specific nano-scaled styrene butadiene rubber based β-nucleating agent (β-NA) on the properties of isotactic polypropylene (iPP) was investigated in the current research. β-NA was applied at the concentration ranged from 0.05 to 0.50 wt%. Microscopic observation revealed that the neat iPP crystals grew very slowly; they ranged in size from 100 to 200 lm. The addition of β-NA led to higher population of nuclei and smaller spherulites than those found in neat iPP. The addition of only 0.05 wt% β-NA significantly decreased the sizes of the spherulites down to 5 lm; the crystal grew very rapidly, leading to extremely fine morphology. Analysis by X-ray diffraction (XRD) confirmed that iPP/β-NA constituted mainly of β-crystal structure. The transformation of β to α phase was observed upon re-extrusion, it was verified by the lowered fraction of the b-crystalline phase (Kβ) although the total degree of crystallinity remained unchanged. A significant improvement in the impact strength of the iPP/β-NA was observed when the β-NA was employed from 0.10 to 0.20 wt%, leading to the formation of tough β-crystals in the β-NA nucleated iPP. The color measurement implied that the iPP nucleated with b-NA was superior in terms of whiteness but it was less transparent, as was evident by the increased haze. © 2013 Elsevier B.V. All rights reserved.
Subject(s)
Butadiene
Crystal growth
Crystal structure
Elastomers
Impact strength
Mechanical properties
Rubber
Styrene
X ray diffraction
Color measurements
Crystalline phase
Degree of crystallinity
Isotactic poly(propylene) (iPP)
Isotactic polypropylene
Microscopic observations
Nucleating agents
Styrene butadiene rubber
Polypropylenes
Crystal growth
Crystal structure
Elastomers
Impact strength
Mechanical properties
Rubber
Styrene
X ray diffraction
Color measurements
Crystalline phase
Degree of crystallinity
Isotactic poly(propylene) (iPP)
Isotactic polypropylene
Microscopic observations
Nucleating agents
Styrene butadiene rubber
Polypropylenes