Toughening mechanism in impact polypropylene copolymer containing a β-nucleating agent

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23117-23125 ◽  
Author(s):  
Biwei Qiu ◽  
Feng Chen ◽  
Yonggang Shangguan ◽  
Yu Lin ◽  
Qiang Zheng ◽  
...  
Keyword(s):  
Nucleating Agent ◽  
Toughening Mechanism ◽  
Shear Yielding ◽  
Impact Polypropylene Copolymer ◽  
Stress Whitening

The voids in β-nucleated IPC could help to ease craze formation and multiply shear yielding while extensive stress whitening phenomenon appears in neat IPC.

Effect of Arenga Pinnata “Ijuk” Fiber as Nucleating Agent on Crystallization Kinetics of Impact Polypropylene Copolymer

2018 ◽  
Vol 923 ◽  
pp. 56-60 ◽  
Author(s):  
Mochamad Chalid ◽  
Evana Yuanita ◽  
Ghiska Ramahdita ◽  
Jaka Fajar Fatriansyah
Keyword(s):  
Crystal Growth ◽  
Crystallization Kinetics ◽  
Nucleating Agent ◽  
Avrami Equation ◽  
Nucleating Agents ◽  
Impact Polypropylene Copolymer ◽  
Kinetics Of

Impact Polypropylene Copolymer (IPC) is one of the PP type which is widely used. IPC was made with addition of ethylene in PP which decreases PP crystallinity. Many efforts have been made to improve the properties of PP crystallinity by addition of nucleating agents. In this study, we use Arenga Pinnata “Ijuk” fiber as PP nucleating agent. In order to determine the effect of “Ijuk” fiber as nucleating agents in kinetics aspect, we used DSC measurement based on Avrami equation. The results showed that the addition of ijuk decreases crystallizationhalf timeand dimension of crystal growth which indicate the effects of “Ijuk” fiber as a nucleating agent.

Combined effect of β-nucleating agent and processing melt temperature on the toughness of impact polypropylene copolymer

2012 ◽  
Vol 62 (2) ◽  
pp. 172-178 ◽  
Author(s):  
Feng Luo ◽  
Chenlong Xu ◽  
Nanying Ning ◽  
Ke Wang ◽  
Hua Deng ◽  
...  
Keyword(s):  
Nucleating Agent ◽  
Combined Effect ◽  
Melt Temperature ◽  
Impact Polypropylene Copolymer

Increased nucleation efficiency of an in situ–formed β-nucleating agent for impact polypropylene copolymer

2019 ◽  
Vol 26 (10) ◽  
Author(s):  
Lan Chen ◽  
Yaoding Yang ◽  
Zhong Xin ◽  
Wei Qin ◽  
Shuai Zhou ◽  
...  
Keyword(s):  
Nucleating Agent ◽  
Impact Polypropylene Copolymer

Ternary Polypropylene/Polyolefin Elastomer/Attapulgite Composites

2006 ◽  
Vol 11-12 ◽  
pp. 477-480 ◽  
Author(s):  
Meng Xiang Zhang ◽  
Li Xin Mao
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Nucleating Agent ◽  
Toughening Mechanism ◽  
Polyolefin Elastomer ◽  
The Matrix

Modification of polypropylene (PP) by the addition of polyolefin elastomer (POE) and attapulgite (AT) has been investigated. The result have shown that the addition of POE and AT gave PP excellent mechanical properties of improved impact strength and comparable stiffness. The bonding between AT and the matrix was enhanced with the addition of dispersant EBS. AT was an effective nucleating agent for PP crystallization, and finer and more homogeneous spherulites of PP was obtained. In this study, the toughening mechanism of the composites was also discussed.

scholarly journals Crystallization Kinetics Study of Impact Polypropylene Copolymer with Kenaf as Nucleating Agent and Reinforcement

2019 ◽  
Vol 10 (5) ◽  
pp. 999 ◽  
Author(s):  
Jaka Fajar Fatriansyah ◽  
Muhammad Joshua Yuriansyah Barmaki ◽  
Rahma Lailani ◽  
Mochamad Chalid
Keyword(s):  
Crystallization Kinetics ◽  
Nucleating Agent ◽  
Kinetics Study ◽  
Impact Polypropylene Copolymer

Toughness Reinforcement in Carbon Nanotube-Filled High Impact Polypropylene Copolymer with β-Nucleating Agent

2016 ◽  
Vol 55 (32) ◽  
pp. 8733-8742 ◽  
Author(s):  
Yanhui Chen ◽  
Song Yang ◽  
Haoqing Yang ◽  
Min Zhang ◽  
Qiuyu Zhang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Nucleating Agent ◽  
High Impact ◽  
Impact Polypropylene Copolymer

Toughening effects of nucleating agent on impact polypropylene copolymer

2014 ◽  
Vol 131 (17) ◽  
pp. n/a-n/a ◽  
Author(s):  
Miaomiao Sun ◽  
Dali Gao ◽  
Hongbo Zhang ◽  
Hao Zou ◽  
Meng Xu ◽  
...  
Keyword(s):  
Nucleating Agent ◽  
Impact Polypropylene Copolymer

Phase separation in sol gel-derived ceramic films of silica-zirconia, alumina-zirconia, and titania-zirconia system

1994 ◽  
Vol 52 ◽  
pp. 646-647
Author(s):  
J. Tong ◽  
L. Eyring
Keyword(s):  
Fracture Toughness ◽  
Phase Separation ◽  
Sol Gel ◽  
Great Influence ◽  
High Strength ◽  
Chemical Durability ◽  
Separation Method ◽  
Toughening Mechanism ◽  
Ceramic Films ◽  
Zirconia Toughened Alumina

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

Stress Whitening in Polypropylene. I. Light Scattering Theory and Model Experiments

1995 ◽  
Vol 60 (11) ◽  
pp. 1875-1887 ◽  
Author(s):  
Jaroslav Holoubek ◽  
Miroslav Raab
Keyword(s):  
Refractive Index ◽  
Light Scattering ◽  
Incident Light ◽  
Polymeric Materials ◽  
Wavelength Dependence ◽  
Theoretical Background ◽  
Surrounding Matrix ◽  
Embedded Particles ◽  
The One ◽  
Stress Whitening

Theoretical background for an optical method is presented which makes it possible to distinguish unambiguously between voids and particles as light scattering sites in polymeric materials. Typical dependences of turbidity as a function of diameter of scattering elements, their volume fractions and also turbidity curves as a function of the wavelength of the incident light were calculated, based both on the Lorenz-Mie theory and the fluctuation theory. Such dependences calculated for polypropylene-containing voids on the one hand and particles, differing only slightly from the surrounding matrix in their refractive index, on the other hand, are markedly different. The most significant results are: (i) Turbidity is at least by two orders of magnitude larger for voids in comparison to embedded particles of ethylene-propylene (EPDM) rubber of the same size, concentration and at the same wavelength. (ii) The wavelength dependence of turbidity for EPDM particles and the inherent refractive index fluctuations in the polypropylene matrix is much steeper as compared to voids for all considered diameters (0.1-10 μm). Thus, the nature of stress whitening in complex polymeric materials can be determined from turbidity measurements.

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