Development and characterization of 1,1-bis(3-methyl-4-hydroxyphenyl) cyclohexane-based benzoxazine and cyanate ester hybrid polymer matrices: Thermal and morphological properties

1,1-Bis(3-methyl-4-hydroxyphenyl)cyclohexane-based benzoxazine monomer and 1,1-bis(3-methyl-4-cyanatophenyl)cyclohexane were blended together via in situ polymerization. The chemical blending of benzoxazines with cyanate ester was carried out thermally and the resulting product was analyzed by Fourier transform infrared spectra. The benzoxazine–cyanate ester hybrid polymer matrices were investigated for their thermal and morphological properties. The glass transition temperature, curing behavior, thermal stability, char yield, and flame resistance of the hybrid polymer matrices were studied by means of differential scanning calorimeter and thermogravimetric analysis.

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In situ polymerization of polypyrrole on cotton fabrics as flexible electrothermal materials

Journal of Engineered Fibers and Fabrics ◽

10.1177/1558925019827447 ◽

2019 ◽

Vol 14 ◽

pp. 155892501982744 ◽

Cited By ~ 6

Author(s):

Juan Xie ◽

Wei Pan ◽

Zheng Guo ◽

Shan Shan Jiao ◽

Ling Ping Yang

Keyword(s):

Thermal Stability ◽

Tensile Strength ◽

In Situ Polymerization ◽

Thermo Gravimetric Analysis ◽

Cotton Fabrics ◽

Morphological Properties ◽

Polymerization Process ◽

Maximum Temperature ◽

Gravimetric Analysis

Polypyrrole/cotton composites have substantial application potential in flexible heating devices due to their flexibility, high conductivity, and thermal stability. In this context, a series of flexible polypyrrole/cotton fabrics were intrinsically prepared using in situ polymerization process with the different Py/FeCl3 concentration ratios. To investigate their structural and morphological properties, thermal stability, tensile strength, conductivity, and heat-generating property, the composite fabrics were subjected to Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, thermo-gravimetric analysis, mechanical properties, and resistivity measurements. The results showed that polypyrrole/cotton fabrics exhibited a low resistivity of 0.37 Ω cm. Temperature–time curve showed that temperature of the polypyrrole/cotton fabrics increased very quickly from room temperature to a steady-state maximum temperature of 168.3°C within 3 min at applied voltage of 5 V. Tensile strength of polypyrrole/cotton composites reached to 58 MPa, which far surpassed raw cotton fabrics. Therefore, polypyrrole/cotton fabrics have exhibited high electrical, thermal properties, and mechanical strength, which can be utilized as an ideal flexible heating element.

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Preparation and Characterization of PET/MMT Nanocomposition Modified by MDI

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.904.7 ◽

2014 ◽

Vol 904 ◽

pp. 7-9

Author(s):

Xiao Hua Gu ◽

Xi Wei Zhang ◽

Bao Yun Xu ◽

Peng Zeng

Keyword(s):

Thermal Stability ◽

In Situ Polymerization ◽

X Ray Diffraction ◽

X Ray ◽

Thermogravimetric Analyzer ◽

Organic Montmorillonite ◽

Polymerization Method ◽

Thermal Stability Of

In this paper, the diphenyl methane diisocyanate (MDI) was used to modify montmorillonoid (MMT) and got the organic montmorillonite (OMMT), which was used with the monomers of PET by in situ polymerization method to prepare PET/MMT nanocomposition. The OMMT was analyzed by the X ray diffraction (XRD) to test the change of the spacing layer. Dispersion of MMT in the PET/MMT nanocomposites were studied with XRD and SEM and by means of thermogravimetric analyzer (TGA) on the thermal stability of PET/MMT nanocomposites. The results showed that, MDI modified MMT successfully, and the compatibility of MMT and PET was increased .

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Preparation and Characterization of Conductive Polyaniline/Cerium Dioxide Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.663-665.686 ◽

2010 ◽

Vol 663-665 ◽

pp. 686-689

Author(s):

Hui Huang ◽

Zhong Cheng Guo

Keyword(s):

Fourier Transform ◽

Cerium Dioxide ◽

In Situ Polymerization ◽

Ceo2 Nanoparticles ◽

Pure Pani ◽

X Ray Diffraction ◽

Maximum Conductivity ◽

Conductive Polyaniline

Conductive polyaniline/cerium dioxide (PANI/CeO2) composites have been synthesized by in-situ polymerization of aniline in the presence of CeO2 nanoparticles. The structure and thermal stability of obtained composites were characterized by Fourier-transform infrared spectra (FTIR), Fourier-transform Raman spectra (FT-Raman), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The results showed that PANI and CeO2 nanoparticles were not simply blended, and a strong interaction existed at the interface of CeO2 and PANI. In the PANI/CeO2 composite, the degree crystallinity of PANI increased and diffraction pattern of CeO2 was amorphous. And that the composites were more thermally stable than that of the pure PANI. Electrical conductivity measurements indicated that the conductivity of PANI/CeO2 composites was much higher than that of the pure PANI and the maximum conductivity obtained was 11.68 S/cm at 17.5 wt% of CeO2.

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Preparation and Characterization of Polyacrylonitrile-Metal-O-MMT Nanocomposites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.221.316 ◽

2011 ◽

Vol 221 ◽

pp. 316-320

Author(s):

Hui Xia Feng ◽

Gong Wei Fu ◽

Yi Wang ◽

Na Li Chen ◽

Rui Chen Yang

Keyword(s):

Thermal Stability ◽

Powder Diffraction ◽

Interlayer Space ◽

In Situ Polymerization ◽

X Ray ◽

Thermal Stability Of ◽

Better Than ◽

Montmorillonite Nanocomposites

Polyacrylonitrile-metal-O-montmorillonite nanocomposites were prepared by means of in situ polymerization. The Na-montmorillonite was modified by quaternary ammonium salt after the exchange of its interlayer cations with Ni2+. Infrared spectra and X-ray powder diffraction were employed to characterize the obtained polyacrylonitrile-metal-O-montmorillonite. The results of FTIR show that metal-O-montmorillonite has been concerned with the polymerization of PAN. The result of X-ray powder diffraction shows that the inserting of the acrylonitrile monomer can enlarge the interlayer space of montmorillonite. It is also shown that the polyacrylonitrile-metal-O- montmorillonite nanocomposites have been synthesized. The thermal stability of PAN /MMT is better than that of pure PAN.

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