scholarly journals Evolution of cellular morphologies and crystalline structures in high-expansion isotactic polypropylene/cellulose nanofiber nanocomposite foams

RSC Advances ◽  
2018 ◽  
Vol 8 (28) ◽  
pp. 15405-15416 ◽  
Author(s):  
Long Wang ◽  
Yuta Hikima ◽  
Masahiro Ohshima ◽  
Takafumi Sekiguchi ◽  
Hiroyuki Yano
Keyword(s):  
Isotactic Polypropylene ◽  
Cell Morphology ◽  
Cellulose Nanofiber ◽  
Crystalline Structures ◽  
Nanocomposite Foams ◽  
Injection Molded ◽  
Crystalline Microstructure

The development of cell morphology and crystalline microstructure of high expansion injection-molded isotactic polypropylene/cellulose nanofiber (PP/CNF) nanocomposite foams was understood.

Highly compressible, heat-insulating and self-extinguishing cellulose nanofiber/aramid nanofiber nanocomposite foams

2021 ◽  
Vol 261 ◽  
pp. 117837
Author(s):  
Jiaoyang Li ◽  
Zhaoqing Lu ◽  
Fan Xie ◽  
Jizhen Huang ◽  
Doudou Ning ◽  
...  
Keyword(s):  
Cellulose Nanofiber ◽  
Nanocomposite Foams

Effect of cellulose nanofiber content on flexural properties of a model, thermoplastic, injection-molded, polymethyl methacrylate denture base material

2020 ◽  
Vol 102 ◽  
pp. 103513 ◽  
Author(s):  
Tomohiro Kawaguchi ◽  
Lippo V.J. Lassila ◽  
Hirono Baba ◽  
Shu Tashiro ◽  
Ippei Hamanaka ◽  
...  
Keyword(s):  
Polymethyl Methacrylate ◽  
Base Material ◽  
Cellulose Nanofiber ◽  
Flexural Properties ◽  
Denture Base ◽  
Injection Molded

scholarly journals Effect of Cellulose Nanofiber (CNF) Surface Treatment on Cellular Structures and Mechanical Properties of Polypropylene/CNF Nanocomposite Foams via Core-Back Foam Injection Molding

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 249 ◽  
Author(s):  
Long Wang ◽  
Kiyomi Okada ◽  
Yuta Hikima ◽  
Masahiro Ohshima ◽  
Takafumi Sekiguchi ◽  
...  
Keyword(s):  
Injection Molding ◽  
Mechanical Performance ◽  
Tensile Modulus ◽  
Cellulose Nanofiber ◽  
Cellular Structures ◽  
Test Results ◽  
Nanocomposite Foams ◽  
Composite Foams ◽  
Reinforcing Agent ◽  
Foam Injection Molding

Herein, lightweight nanocomposite foams with expansion ratios ranging from 2–10-fold were fabricated using an isotactic polypropylene (iPP) matrix and cellulose nanofiber (CNF) as the reinforcing agent via core-back foam injection molding (FIM). Both the native and modified CNFs, including the different degrees of substitution (DS) of 0.2 and 0.4, were melt-prepared and used for producing the polypropylene (PP)/CNF composites. Foaming results revealed that the addition of CNF greatly improved the foamability of PP, reaching 2–3 orders of magnitude increases in cell density, in comparison to those of the neat iPP foams. Moreover, tensile test results showed that the incorporation of CNF increased the tensile modulus and yield stress of both solid and 2-fold foamed PP, and a greater reinforcing effect was achieved in composites containing modified CNF. In the compression test, PP/CNF composite foams prepared with a DS of 0.4 exhibited dramatic improvements in mechanical performance for 10-fold foams, in comparison to iPP, with increases in the elastic modulus and collapse stress of PP foams of 486% and 468%, respectively. These results demonstrate that CNF is extraordinarily helpful in enhancing the foamability of PP and reinforcing PP foams, which has importance for the development of lightweight polymer composite foams containing a natural nanofiber.

Shear-induced fibrillation and resultant mechanical properties of injection-molded polyamide 1010/isotactic polypropylene blends

2011 ◽  
Vol 60 (11) ◽  
pp. 1655-1662 ◽  
Author(s):  
Run Su ◽  
Kun Jiang ◽  
Yao Ge ◽  
Shanwei Hu ◽  
Zhen Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Injection Molded ◽  
Polypropylene Blends ◽  
Polyamide 1010

Shear-induced epitaxial crystallization in injection-molded bars of high-density polyethylene/isotactic polypropylene blends

Polymer ◽  
2007 ◽  
Vol 48 (15) ◽  
pp. 4529-4536 ◽  
Author(s):  
Run Su ◽  
Ke Wang ◽  
Ping Zhao ◽  
Qin Zhang ◽  
Rongni Du ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
High Density Polyethylene ◽  
High Density ◽  
Epitaxial Crystallization ◽  
Injection Molded ◽  
Polypropylene Blends

Unusual hierarchical distribution of β-crystals and improved mechanical properties of injection-molded bars of isotactic polypropylene

RSC Advances ◽  
2014 ◽  
Vol 4 (48) ◽  
pp. 25135-25147 ◽  
Author(s):  
Long Wang ◽  
Ming-Bo Yang
Keyword(s):  
Mechanical Properties ◽  
Isotactic Polypropylene ◽  
Injection Molded

Shish-kebab and β-cylindrite morphology were observed simultaneously in the GAIM iPP part, which showed greatly improved mechanical properties.

scholarly journals Effect of Quinacridone Pigments on Properties and Morphology of Injection Molded Isotactic Polypropylene

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Mateusz Barczewski ◽  
Danuta Matykiewicz ◽  
Bartłomiej Hoffmann
Keyword(s):  
Isotactic Polypropylene ◽  
Morphological Changes ◽  
Hexagonal Phase ◽  
Impact Resistance ◽  
Polymeric Materials ◽  
Hardness Test ◽  
Thermomechanical Properties ◽  
Scanning Calorimetry ◽  
Nucleation Behavior ◽  
Injection Molded

Two quinacridone pigments were added (0.01; 0.05; 0.1; 0.5; 1; 2 wt%) to isotactic polypropylene (iPP), and their influence on mechanical and thermomechanical properties were investigated. Complex mechanical and thermomechanical iPP properties analyses, including static tensile test, Dynstat impact resistance measurement, and hardness test, as well as dynamic mechanic thermal analysis (DMTA), were realized in reference to morphological changes of polymeric materials. In order to understand the differences in modification efficiency and changes in polymorphism of polypropylene matrix caused by incorporation of pigments, differential scanning calorimetry (DSC) and wide-angle X-ray scattering (WAXS) experiments were done. Both pigments acted as highly effective nucleating agents that influence morphology and mechanical properties of isotactic polypropylene injection molded samples. Differences between polypropylene samples nucleated by two pigments may be attributed to different heterogeneous nucleation behavior dependent on pigment type. As it was proved by WAXS investigations, the addition of γ-quinacridone (E5B) led to crystallization of polypropylene in hexagonal phase (β-iPP), while for β-quinacridone (ER 02) modified polypropylene no evidence of iPP β-phase was observed.

Cell morphology and mechanical properties of microcellular mucell®injection molded polyetherimide and polyetherimide/fillers composite foams

2013 ◽  
Vol 130 (6) ◽  
pp. 4171-4181 ◽  
Author(s):  
Jingli Li ◽  
Zhenglun Chen ◽  
Xianzhong Wang ◽  
Tao Liu ◽  
Yufeng Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cell Morphology ◽  
Composite Foams ◽  
Injection Molded ◽  
Morphology And Mechanical Properties
Sign in / Sign up

Export Citation Format

Share Document