Related Experiment Video
Updated: Sep 24, 2025

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process
Published on: June 30, 2023
Ordered structure effects on β-nucleated isotactic polypropylene/graphene oxide composites with different thermal
Yansong Yu1, Ruizhang Xu1, Jinyao Chen1
1State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University Chengdu 610065 China jiankang@scu.edu.cn.
Ordered structure effects (OSE) influence β-nucleated isotactic polypropylene/graphene oxide (β-iPP/GO) composites. Thermal history significantly impacts OSE efficiency, which can be optimized by controlling melting time and fusion temperature for improved material properties.
Area of Science:
- Materials Science
- Polymer Science
- Nanocomposites
Background:
- Ordered structure effects (OSE) are crucial for understanding polymer crystallization.
- Isotactic polypropylene (iPP) and graphene oxide (GO) composites exhibit complex crystallization behaviors.
- Thermal history significantly influences the structural evolution of polymer composites.
Purpose of the Study:
- To investigate the influence of OSE on the crystallization behavior of β-nucleated iPP/GO composites.
- To elucidate the role of thermal history (cooling rate, fusion temperature, melting time) on OSE.
- To understand the mechanisms governing OSE in iPP/GO composites.
Main Methods:
- Differential scanning calorimetry (DSC) for thermal analysis.
- Wide-angle X-ray diffraction (WAXD) for structural analysis.
- Controlled thermal treatments (varying fusion temperature and melting time) to induce OSE.
Main Results:
- OSE occurs within a specific fusion temperature range (Region II) for all thermal histories.
- Medium cooling rate (MED) samples exhibited the highest OSE efficiency.
- Slow cooling rate (SLOW) samples showed the highest crystallinity and crystalline perfection, while fast cooling rate (FAST) samples showed the lowest.
- OSE efficiency is dependent on melting time, with optimal times varying for FAST and SLOW samples.
Conclusions:
- Thermal history is a critical factor affecting OSE in β-iPP/GO composites.
- OSE efficiency can be enhanced by optimizing fusion temperature and melting time.
- The findings provide insights into controlling the crystallization of iPP/GO nanocomposites for tailored properties.
More Related Videos
07:15A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
Published on: December 11, 2014
07:53Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
Published on: April 27, 2019
Related Concept Videos
Polymer Classification: Stereospecificity
Polymer Classification: Architecture
Molecular Weight of Step-Growth Polymers
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
Polymer Classification: Crystallinity
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Bending of Members Made of Several Materials
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...