Influences of Hyperbranched Polyester Modification on the Crystallization Kinetics of Isotactic Polypropylene/Graphene Oxide Composites

In this study, the hyperbranched polyester grafted graphene oxide (GO-H202) was synthesized, and the isotactic polypropylene/graphene oxide (iPP/GO) composites were prepared. Results of X-ray photoelectron spectra (XPS), Fourier transform infrared (FT-IR), and transmission electron microscopy (TEM)...

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Published inPolymers Vol. 11; no. 3; p. 433
Main Authors Hao, Zengheng, Li, Lu, Yang, Bo, Sheng, Xingyue, Liao, Xia, He, Leilei, Liu, Pan
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 06.03.2019
MDPI
Subjects
Crystal growth
Crystallization
crystallization kinetics
Fourier transforms
Graphene
graphene oxide
hyperbranched polyester
Infrared spectra
isotactic polypropylene
Isotacticity
Kinetics
Mechanical properties
Nucleation
nucleation and crystal growth
Optical microscopy
Photoelectrons
Polyesters
Polymer matrix composites
Polymers
Polypropylene
Thermogravimetric analysis
Transmission electron microscopy
X ray photoelectron spectroscopy
Beijing China
United States > US
China
graphene oxide
hyperbranched polyester
isotactic polypropylene
crystallization kinetics
nucleation and crystal growth
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Abstract In this study, the hyperbranched polyester grafted graphene oxide (GO-H202) was synthesized, and the isotactic polypropylene/graphene oxide (iPP/GO) composites were prepared. Results of X-ray photoelectron spectra (XPS), Fourier transform infrared (FT-IR), and transmission electron microscopy (TEM) revealed the successful synthesis of GO-H202, while thermogravimetric analysis (TGA) indicated that the weight ratio of grafting was about 35 wt %. Differential scanning calorimetry (DSC) and polarized optical microscopy (POM) were carried out to investigate the role of GO and GO-H202 on the crystallization kinetics of the composites. Results suggested that the addition of GO enhanced the nucleation rate and crystallizability of the composites, while GO-H202 exhibited a higher crystallization acceleration effect compared to neat GO; results of isothermal crystallization kinetics and self-nucleation isothermal crystallization kinetics showed that both the overall crystallization rate and crystal growth rate increase after the addition of GO and GO-H202, and the crystallization acceleration of GO-H202 became evidently stronger compared to GO. Moreover, the variation trends of Avrami exponent with the isothermal crystallization temperature changed significantly after the addition of GO or GO-H202, which might imply that the addition of GO and GO-H202 lead to different crystallization dimensionalities during the isothermal crystallization of the composites. The related mechanism was also discussed.
AbstractList In this study, the hyperbranched polyester grafted graphene oxide (GO-H202) was synthesized, and the isotactic polypropylene/graphene oxide (iPP/GO) composites were prepared. Results of X-ray photoelectron spectra (XPS), Fourier transform infrared (FT-IR), and transmission electron microscopy (TEM) revealed the successful synthesis of GO-H202, while thermogravimetric analysis (TGA) indicated that the weight ratio of grafting was about 35 wt %. Differential scanning calorimetry (DSC) and polarized optical microscopy (POM) were carried out to investigate the role of GO and GO-H202 on the crystallization kinetics of the composites. Results suggested that the addition of GO enhanced the nucleation rate and crystallizability of the composites, while GO-H202 exhibited a higher crystallization acceleration effect compared to neat GO; results of isothermal crystallization kinetics and self-nucleation isothermal crystallization kinetics showed that both the overall crystallization rate and crystal growth rate increase after the addition of GO and GO-H202, and the crystallization acceleration of GO-H202 became evidently stronger compared to GO. Moreover, the variation trends of Avrami exponent with the isothermal crystallization temperature changed significantly after the addition of GO or GO-H202, which might imply that the addition of GO and GO-H202 lead to different crystallization dimensionalities during the isothermal crystallization of the composites. The related mechanism was also discussed.
In this study, the hyperbranched polyester grafted graphene oxide (GO-H202) was synthesized, and the isotactic polypropylene/graphene oxide (iPP/GO) composites were prepared. Results of X-ray photoelectron spectra (XPS), Fourier transform infrared (FT-IR), and transmission electron microscopy (TEM) revealed the successful synthesis of GO-H202, while thermogravimetric analysis (TGA) indicated that the weight ratio of grafting was about 35 wt %. Differential scanning calorimetry (DSC) and polarized optical microscopy (POM) were carried out to investigate the role of GO and GO-H202 on the crystallization kinetics of the composites. Results suggested that the addition of GO enhanced the nucleation rate and crystallizability of the composites, while GO-H202 exhibited a higher crystallization acceleration effect compared to neat GO; results of isothermal crystallization kinetics and self-nucleation isothermal crystallization kinetics showed that both the overall crystallization rate and crystal growth rate increase after the addition of GO and GO-H202, and the crystallization acceleration of GO-H202 became evidently stronger compared to GO. Moreover, the variation trends of Avrami exponent n with the isothermal crystallization temperature TcISO changed significantly after the addition of GO or GO-H202, which might imply that the addition of GO and GO-H202 lead to different crystallization dimensionalities during the isothermal crystallization of the composites. The related mechanism was also discussed.
In this study, the hyperbranched polyester grafted graphene oxide (GO-H202) was synthesized, and the isotactic polypropylene/graphene oxide (iPP/GO) composites were prepared. Results of X-ray photoelectron spectra (XPS), Fourier transform infrared (FT-IR), and transmission electron microscopy (TEM) revealed the successful synthesis of GO-H202, while thermogravimetric analysis (TGA) indicated that the weight ratio of grafting was about 35 wt %. Differential scanning calorimetry (DSC) and polarized optical microscopy (POM) were carried out to investigate the role of GO and GO-H202 on the crystallization kinetics of the composites. Results suggested that the addition of GO enhanced the nucleation rate and crystallizability of the composites, while GO-H202 exhibited a higher crystallization acceleration effect compared to neat GO; results of isothermal crystallization kinetics and self-nucleation isothermal crystallization kinetics showed that both the overall crystallization rate and crystal growth rate increase after the addition of GO and GO-H202, and the crystallization acceleration of GO-H202 became evidently stronger compared to GO. Moreover, the variation trends of Avrami exponent n with the isothermal crystallization temperature T cISO changed significantly after the addition of GO or GO-H202, which might imply that the addition of GO and GO-H202 lead to different crystallization dimensionalities during the isothermal crystallization of the composites. The related mechanism was also discussed.
Author Sheng, Xingyue
He, Leilei
Hao, Zengheng
Li, Lu
Yang, Bo
Liu, Pan
Liao, Xia
AuthorAffiliation 3 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2 College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; liaoxia@scu.edu.cn
1 Chongqing Zhixiang Paving Technology Engineering Co., Ltd., Chongqing 401336, China; haozengheng@cmhk.com (Z.H.); shengxingyue@cmhk.com (X.S.); heleilei@cmhk.com (L.H.); liupan@cmhk.com (P.L.)
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/30960419$$D View this record in MEDLINE/PubMed
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Issue 3
Keywords graphene oxide
hyperbranched polyester
isotactic polypropylene
crystallization kinetics
nucleation and crystal growth
Language English
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– ident: ref1
  doi: 10.1007/BF02731859
SSID ssj0000456617
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Snippet In this study, the hyperbranched polyester grafted graphene oxide (GO-H202) was synthesized, and the isotactic polypropylene/graphene oxide (iPP/GO) composites...
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SubjectTerms Crystal growth
Crystallization
crystallization kinetics
Fourier transforms
Graphene
graphene oxide
hyperbranched polyester
Infrared spectra
isotactic polypropylene
Isotacticity
Kinetics
Mechanical properties
Nucleation
nucleation and crystal growth
Optical microscopy
Photoelectrons
Polyesters
Polymer matrix composites
Polymers
Polypropylene
Thermogravimetric analysis
Transmission electron microscopy
X ray photoelectron spectroscopy
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Title Influences of Hyperbranched Polyester Modification on the Crystallization Kinetics of Isotactic Polypropylene/Graphene Oxide Composites
URI https://www.ncbi.nlm.nih.gov/pubmed/30960419
https://www.proquest.com/docview/2557228269
https://search.proquest.com/docview/2206225875
https://pubmed.ncbi.nlm.nih.gov/PMC6473585
https://doaj.org/article/3cb014a94fc6403f8fa33403e5b8e381
Volume 11
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