1
|
Li G, Fei Y, Kuang T, Liu T, Zhong M, Li Y, Jiang J, Turng LS, Chen F. The Injected Foaming Study of Polypropylene/Multiwall Carbon Nanotube Composite with In Situ Fibrillation Reinforcement. Polymers (Basel) 2022; 14:polym14245411. [PMID: 36559778 PMCID: PMC9781881 DOI: 10.3390/polym14245411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/30/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
This paper explored the injection foaming process of in situ fibrillation reinforced polypropylene composites. Using polypropylene (PP) as the continuous phase, polytetrafluoroethylene (PTFE) as the dispersed phase, multi-wall carbon nanotubes (MWCNTs) as the conductive filler, and PP grafted with maleic anhydride (PP-g-MA) as the compatibilizer, a MWCNTs/PP-g-MA masterbatch was prepared by using a solution blending method. Then, a lightweight, conductive PP/PTFE/MWCNTs composite foam was prepared by means of extruder granulation and supercritical nitrogen (ScN2) injection foaming. The composite foams were studied in terms of rheology, morphological, foaming behavior and mechanical properties. The results proved that the in situ fibrillation of PTFE can have a remarkable effect on melt strength and viscoelasticity, thus improving the foaming performance; we found that PP/3% PTFE showed excellent performance. Meanwhile, the addition of MWCNTs endows the material with conductive properties, and the conductivity reached was 2.73 × 10-5 S/m with the addition of 0.2 wt% MWCNTs. This study's findings are expected to be applied in the lightweight, antistatic and high-performance automotive industry.
Collapse
Affiliation(s)
- Gang Li
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yanpei Fei
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
- Correspondence: (Y.F.); (J.J.); (F.C.)
| | - Tairong Kuang
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Tong Liu
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Mingqiang Zhong
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yanbiao Li
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jing Jiang
- National Center for International Research of Micro-Nano Molding Technology, School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- Correspondence: (Y.F.); (J.J.); (F.C.)
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, WI 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA
| | - Feng Chen
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
- Correspondence: (Y.F.); (J.J.); (F.C.)
| |
Collapse
|
2
|
Effects of grafting and long-chain branching structures on rheological behavior, crystallization properties, foaming performance, and mechanical properties of polyamide 6. E-POLYMERS 2022. [DOI: 10.1515/epoly-2022-0030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Polyamide 6 (PA6) was modified with ethylene maleic anhydride syndiotactic copolymer resin (ZeMac), and triglycidyl isocyanurate (TGIC) as modifiers to prepare a grafting structure and a long-chain branching structure, respectively. The effects of two modifiers on the rheological behavior, crystallization properties, foaming performance, and mechanical properties of PA6 were systematically studied by rotating rheometry, differential scanning calorimetry and scanning electron microscopy. The results showed that there were differences in crystallization properties between the two modification methods, but they significantly improved the rheological, foaming performance, and mechanical properties of PA6. In particular, PA6 with long-chain branching structure through TGIC modification showed better performance in various physicochemical characterizations. The introduction of ZeMac reduced the average diameter of bubbles in pure PA6 from 146.32 to 88.12 µm, and the density of bubbles increased from 1.69 × 105 to 5.35 × 105 cells·cm−3. The introduction of TGIC reduced the average diameter of bubbles in pure PA6 from 146.32 to 64.36 µm, and the density of bubbles increased to 1.31 × 106 cells·cm−3. Moreover, the mechanical properties of both nonfoamed and foamed samples were improved after modification.
Collapse
|
3
|
Wu G, Song R, Ma Y, Xie J, Yang W, Xie P. Polypropylene‐based
in situ
fibrillation‐reinforced
ternary composite foams with improved
filler‐phase
dispersion. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25848] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Gaojian Wu
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Renda Song
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Yitao Ma
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Jinzhao Xie
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Weimin Yang
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing China
| | - Pengcheng Xie
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing China
| |
Collapse
|