研究目的
Investigating the effect of the presence of graphene nanoplatelets on the photo-oxidation behaviour of polypropylene.
研究成果
The presence of graphene nanoplatelets improves the photo-oxidation resistance of polypropylene, with the effect increasing with GnP content. This improvement is attributed to the UV absorption ability and radical scavenging action of GnP, correlated with the exposed surface area of the nanoplatelets rather than their size.
研究不足
The study is limited to the effects of graphene nanoplatelets on the photo-oxidation behavior of polypropylene within the concentration range of 0.5 to 2 wt/wt%. The findings may not be directly applicable to other polymer matrices or higher concentrations of GnP.
1：Experimental Design and Method Selection:
The study involved the preparation of polypropylene/graphene nanoplatelets (PP/GnP) nanocomposites with varying GnP concentrations (
2：5, 1, and 2 wt/wt%) using a co-rotating twin-screw extruder. The samples were then exposed to accelerated weathering in a Q-UV chamber to study their photo-oxidation behavior. Sample Selection and Data Sources:
The materials used included a commercial polypropylene sample and graphene nanoplatelets (GnP) supplied by XG Sciences Inc.
3：List of Experimental Equipment and Materials:
A co-rotating twin-screw extruder, Q-UV chamber for accelerated weathering, transmission electron microscopy (TEM), scanning electron microscopy (SEM), rotational rheometer, FT-IR ATR spectrometer, Universal Testing Machine, and differential scanning calorimeter (DSC) were used.
4：Experimental Procedures and Operational Workflow:
The nanocomposites were prepared, characterized for morphology, rheological properties, mechanical properties, and thermal properties before and after exposure to UV-B light.
5：Data Analysis Methods:
The data were analyzed to understand the effect of GnP on the photo-oxidation behavior of PP, including changes in viscosity, molecular weight, mechanical properties, and crystallinity.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
transmission electron microscopy
JEOL JEM-2100
JEOL
Used for evaluating the morphology of the nanocomposites.
-
scanning electron microscopy
Quanta 200 ESEM
FEI
Used for evaluating the morphology of the nanocomposites.
-
FT-IR ATR spectrometer
Spectrum One
Perkin-Elmer
Used for obtaining FT-IR ATR spectra of the samples.
-
differential scanning calorimeter
DSC 7
Perkin Elmer
Used for studying the thermal properties of the materials.
-
Capilene E50E
Carmel Olefins
Polypropylene sample used as the matrix in the nanocomposites.
-
xGnP
Grade C
XG Sciences Inc
Graphene nanoplatelets used as the filler in the nanocomposites.
-
co-rotating twin-screw extruder
EBV 19/35 D
OMC
Used for the preparation of the nanocomposite samples.
-
Q-UV chamber
Q-Labs Corp.
Used for accelerated weathering of the samples.
-
rotational rheometer
ARES-G2
TA Instruments
Used for rheological characterization of the samples.
-
Universal Testing Machine
Instron model 3365
Instron
Used for mechanical testing of the samples.
-
登录查看剩余8件设备及参数对照表
查看全部
