Influence of crystallization on microcellular foaming behavior of polyamide 6 in a supercritical CO 2 ‐assisted route

2020 ◽  
Vol 137 (39) ◽  
pp. 49183
Author(s):  
Shuo Han ◽  
Can Jiang ◽  
Kesong Yu ◽  
Jianguo Mi ◽  
Shihong Chen ◽  
...  
Keyword(s):  
Polyamide 6 ◽  
Microcellular Foaming ◽  
Foaming Behavior ◽  
Influence Of Crystallization

Effect of acrylonitrile–butadiene–styrene terpolymer on the foaming behavior of polypropylene

2019 ◽  
Vol 38 (3-4) ◽  
pp. 47-67 ◽  
Author(s):  
Xiao-Tian Tan ◽  
Ying-Guo Zhou ◽  
Jing-Jing Zhou ◽  
Bin-Bin Dong ◽  
Chun-Tai Liu ◽  
...  
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Suitable Candidate ◽  
Torque Rheometry ◽  
Cell Nucleation ◽  
Foaming Behavior ◽  
Thermal Features ◽  
Influence Of Crystallization ◽  
Butadiene Styrene

To improve the cellular foam structure of common polypropylene (PP), acrylonitrile–butadiene–styrene terpolymer (ABS) and compatibilizer were used to blend with PP, and the foaming behavior of PP/ABS blends was investigated. The solid and foamed samples of the PP/ABS blend with different component were first fabricated by melt extrusion followed by conventional injection molding with or without a blowing agent. The mechanical properties, thermal features, and rheological characterizations of these samples were studied using the tensile test, dynamic mechanical analyzer, differential scanning calorimetry, scanning electron microscopy, X-ray diffraction, and torque rheometry. The results suggest that ABS is a suitable candidate to improve the foamability of PP. The effect of ABS and compatibilizer on the foamability of PP can be attributed to three possible mechanisms, that is, the weak interaction between phases that facilitates cell nucleation, the improved gas-melt viscosity that prevents the escape of gas, and the influence of crystallization behavior that helps to form a fine foaming structure.

scholarly journals Vibration and Sound Response of Glass-Fiber-Reinforced Polyamide 6 Using Microcellular-Foaming-Process-Applied Injection Molding Process

Polymers ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 173
Author(s):  
Hyun Keun Kim ◽  
Jaehoo Kim ◽  
Donghwi Kim ◽  
Youngjae Ryu ◽  
Sung Woon Cha
Keyword(s):  
Injection Molding ◽  
Glass Fiber ◽  
Natural Frequency ◽  
Damping Ratio ◽  
Polyamide 6 ◽  
Injection Molding Process ◽  
Molding Process ◽  
Response Characteristics ◽  
Foaming Process ◽  
Microcellular Foaming

In this study, the vibration and sound response characteristics of composites produced via injection molding applied with a microcellular foaming process (MCPs) were improved. The study was conducted using PA6 and glass fiber composites, which are representative thermoplastic engineering plastics. Two types of specimens were used: a plate specimen to confirm the basic sound and vibration characteristics, and a large roof-rack specimen from an actual vehicle with a complex shape. The frequency response function curve was calculated by conducting an impact test, and natural frequency and damping ratio were measured based on the curve. The results confirmed that, in the case of a specimen manufactured through the injection molding process to which MCPs were applied, the natural frequency was lowered, and the damping ratio decreased. The degree of change in the natural frequency and damping ratio was confirmed. To determine the cause of the change in the natural frequency and damping ratio, the mode shape at the natural frequency of each specimen was measured and the relationship was confirmed by measuring the density and the elastic modulus of the composite. In addition, the usability of the specimens to which MCPs were applied was verified by conducting impact strength and tensile strength tests.

Effect of soft segment molecular weight on the microcellular foaming behavior of TPU using supercritical CO2

2020 ◽  
Vol 160 ◽  
pp. 104816 ◽  
Author(s):  
Mohammadreza Nofar ◽  
Bige Batı ◽  
Emine Büşra Küçük ◽  
Amirjalal Jalali
Keyword(s):  
Molecular Weight ◽  
Supercritical Co2 ◽  
Soft Segment ◽  
Microcellular Foaming ◽  
Foaming Behavior

Modification of iPP microcellular foaming behavior by thermal history control and nucleating agent at compressed CO2

2018 ◽  
Vol 133 ◽  
pp. 383-392 ◽  
Author(s):  
Xiaoli Zhang ◽  
Benwei Li ◽  
Xihuan Wang ◽  
Kun Li ◽  
Gang Wang ◽  
...  
Keyword(s):  
Thermal History ◽  
Nucleating Agent ◽  
Microcellular Foaming ◽  
Foaming Behavior

Effects of Nanoclay and CO2 Content on Foaming Behaviors of PP/PS Alloys

2014 ◽  
Vol 898 ◽  
pp. 107-110
Author(s):  
Ming Yi Wang ◽  
Ru Min Zhu ◽  
Nan Qiao Zhou ◽  
Chul B. Park
Keyword(s):  
Population Density ◽  
Cell Size ◽  
Cell Population ◽  
Foaming Agent ◽  
Foaming Process ◽  
Microcellular Foaming ◽  
Foaming Behavior ◽  
Extrusion Foaming

Microcellular foaming behavior of polypropylene/polystyrene (PP/PS) composites with or without the addition of nanoclay was compared in an extrusion foaming process by using supercritical CO2 as the foaming agent. The influence of CO2 content on foaming of the composites was investigated in the study. Our experiment results demonstrated that the introduction of nanoclay dramatically improved the foaming of the PP/PS blends with increased cell-population density and decreased cell size. With the increase of CO2 injected in the foaming process, cell-population density of the foam samples further increased.

scholarly journals Water-assisted compounding of cellulose nanocrystals into polyamide 6 for use as a nucleating agent for microcellular foaming

Polymer ◽  
2016 ◽  
Vol 84 ◽  
pp. 158-166 ◽  
Author(s):  
Jun Peng ◽  
Philip J. Walsh ◽  
Ronald C. Sabo ◽  
Lih-Sheng Turng ◽  
Craig M. Clemons
Keyword(s):  
Cellulose Nanocrystals ◽  
Nucleating Agent ◽  
Polyamide 6 ◽  
Microcellular Foaming
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