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

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

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.

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

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

scholarly journals Crystallization of Random Metallocene-Catalyzed Propylene-Based Copolymers with Ethylene and 1-Hexene on Rapid Cooling

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2091
Author(s):  
Daniela Mileva ◽  
Jingbo Wang ◽  
René Androsch ◽  
Katalee Jariyavidyanont ◽  
Markus Gahleitner ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Metallocene Catalyst ◽  
Nucleating Agent ◽  
Random Copolymers ◽  
Rapid Cooling ◽  
Significant Difference ◽  
Chip Calorimetry ◽  
High Cooling Rates ◽  
Fast Scanning Chip Calorimetry

Propylene-based random copolymers with either ethylene or 1-hexene as comonomer, produced using a metallocene catalyst, were studied regarding their crystallization behaviors, with a focus on rapid cooling. To get an impression of processing effects, fast scanning chip calorimetry (FSC) was used in addition to the characterization of the mechanical performance. When comparing the comonomer type and the relation to commercial grades based on Ziegler–Natta-type catalysts, both an interaction with the catalyst-related regio-defects and a significant difference between ethylene and 1-hexene was observed. A soluble-type nucleating agent was found to modify the behavior, but to an increasingly lesser degree at high cooling rates.

scholarly journals Fabrication and characterization of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite

e-Polymers ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 038-046
Author(s):  
Xu Yan ◽  
Wanru Zhou ◽  
Xiaojun Ma ◽  
Binqing Sun
Keyword(s):  
Thermal Stability ◽  
Oxygen Permeability ◽  
Water Vapor Permeability ◽  
Barrier Properties ◽  
Nucleating Agent ◽  
Vapor Permeability ◽  
Casting Method ◽  
Increasing Trend ◽  
Solution Casting Method

Abstract In this study, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite (MMT/PHBH) was fabricated by solution-casting method. The results showed that the addition of MMT increased the crystallinity and the number of spherulites, which indicated that MMT was an effective nucleating agent for PHBH. The maximum decomposition peak of the biocomposites moved to a high temperature and residue presented an increasing trend. The biocomposites showed the best thermal stability at 1 wt% MMT. Compared with PHBH, 182.5% and 111.2% improvement in elastic modulus and tensile strength were obtained, respectively. Moreover, the oxygen permeability coefficient and the water vapor permeability of MMT/PHBH biocomposites decreased by 43.9% and 6.9%, respectively. It was also found that the simultaneous enhancements on the crystallizing, thermal stability, mechanical, and barrier properties of biocomposites were mainly caused by the formation of intercalated structure between PHBH and MMT.

scholarly journals Effect of C-S-H Nucleating Agent on Cement Hydration

2021 ◽  
Vol 11 (14) ◽  
pp. 6638
Author(s):  
Wenhao Zhao ◽  
Xuping Ji ◽  
Yaqing Jiang ◽  
Tinghong Pan
Keyword(s):  
Fractal Dimension ◽  
Cement Hydration ◽  
Nucleating Agent ◽  
Crystal Nucleation ◽  
Enhancement Effect ◽  
Hydration Products ◽  
Hydration Degree ◽  
Hydration Kinetics ◽  
Cement Mortars ◽  
Early Strength

This work aims to study the effect of a nucleating agent on cement hydration. Firstly, the C-S-H crystal nucleation early strength agent (CNA) is prepared. Then, the effects of CNA on cement hydration mechanism, early strength enhancement effect, C-S-H content, 28-days hydration degree and 28-days fractal dimension of hydration products are studied by hydration kinetics calculation, resistivity test, BET specific surface area test and quantitative analysis of backscattered electron (BSE) images, respectively. The results show that CNA significantly improves the hydration degree of cement mixture, which is better than triethanolamine (TEA). CNA shortens the beginning time of the induction period by 49.3 min and the end time of the cement hydration acceleration period by 105.1 min than the blank sample. CNA increases the fractal dimension of hydration products, while TEA decreases the fractal dimension. CNA significantly improves the early strength of cement mortars; the 1-day and 3-days strength of cement mortars with CNA are more than the 3-days and 7-days strength of the blank sample. These results will provide a reference for the practical application of the C-S-H nucleating agent.

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