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Transcrystallization of Isotactic Polypropylene/Bacterial Cellulose Hamburger Composite
Bo Wang1,2, Fu-Hua Lin3, Xiang-Yang Li4
1School of Chemistry and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China. 13546474299@163.com.
Polymers
|April 10, 2019
Summary
Bacterial cellulose (BC) enhances isotactic polypropylene (iPP) composites, improving mechanical properties and thermal performance through induced transcrystallization. Maleic anhydride grafted polypropylene (MAPP) further boosts interface compatibility for stronger materials.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Isotactic polypropylene (iPP) exhibits brittleness, limiting its low-temperature applications.
- Fiber reinforcement and transcrystallization are key strategies to enhance iPP strength.
- Bacterial cellulose (BC) offers high crystallinity and mechanical potential as a reinforcing filler.
Purpose of the Study:
- To investigate the reinforcing effects of bacterial cellulose (BC) on isotactic polypropylene (iPP) composites.
- To evaluate the role of maleic anhydride grafted polypropylene (MAPP) in improving iPP/BC interface compatibility.
- To explore the induction of transcrystallization in iPP by BC.
Main Methods:
- Preparation of iPP/BC composites using hot pressing.
- Modification of iPP/BC interface using MAPP.
- Characterization via polarizing optical microscopy (POM), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FT-FTIR).
Main Results:
- BC successfully induced transcrystallization in iPP, as confirmed by POM.
- Addition of BC improved thermal properties and crystallization rate, notably in iPP/MAPP/BC composites (DSC).
- SEM revealed a smoother interface in iPP/MAPP/BC compared to iPP/BC, and FT-IR indicated successful modification of BC.
Conclusions:
- BC fibers effectively induce iPP transcrystallization, leading to enhanced mechanical properties.
- MAPP significantly improves the interfacial compatibility between iPP and BC.
- The developed iPP/BC composites show great potential for applications requiring improved strength and thermal stability.
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