scholarly journals Thermal and Structure Analysis Based on Exfoliation of Clay in Thermosensitive Polymer by in-situ Polymerization

2019 ◽  
Vol 20 (1) ◽  
pp. 88
Author(s):  
Marwah Noori Mohammed ◽  
Kamal Yusoh ◽  
Jun Haslinda Binti Haji Sharifuddin
Keyword(s):  
Thermal Decomposition ◽  
Fourier Transform ◽  
In Situ Polymerization ◽  
Carboxylic Group ◽  
Thermoresponsive Polymer ◽  
Thermosensitive Polymer ◽  
Comparison Results ◽  
Potential Applications ◽  
Stretch Mode

Poly(N-vinylcaprolactam) (PNVCL) offers superior characteristics as a thermoresponsive polymer for various potential applications. An attractive procedure, namely in-situ polymerization, was used to prepare NVCL/clay nanocomposite in different clay ratios. Organo-modified clay as C20 and B30 were employed in a range between 1–5% based on weight. Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) were used to study thermal decomposition and to assess bond conversion during polymerization of the nanocomposite. This research was conducted to study PNVCL characteristics with the addition of clay as a nanocomposite. The stretch mode of the carboxylic group (C=O) and (C=C) was present in the band range about ~1635 cm–1 for the C20, but it was ranging between 1640 to 1664 cm–1 for the B30 of the nanocomposite. It was observed that the decomposition was different for each type of organoclay and the temperature peaked at 30 to 800 °C, to measure the degradation points at 5, 10, and 50%. Comparison results for FTIR and TGA showed that the best nanocomposite was found in the C20 (3%) case.

scholarly journals High Performance Attapulgite/Polypyrrole Nanocomposite Reinforced Polystyrene (PS) Foam Based on Supercritical CO2 Foaming

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 985 ◽  
Author(s):  
Yidong Liu ◽  
Lingfeng Jian ◽  
Tianhua Xiao ◽  
Rongtao Liu ◽  
Shun Yi ◽  
...  
Keyword(s):  
Supercritical Co2 ◽  
High Performance ◽  
In Situ Polymerization ◽  
Compression Modulus ◽  
Blowing Agents ◽  
Foaming Process ◽  
Potential Applications ◽  
Polymerization Method ◽  
Low Solubility

CO2 has been regarded as one of the most promising blowing agents for polystyrene (PS) foam due to its non-flammability, low price, nontoxicity, and eco-friendliness. However, the low solubility and fast diffusivity of CO2 in PS hinder its potential applications. In this study, an attapulgite (ATP)/polypyrrole (PPy) nanocomposite was developed using the in situ polymerization method to generate the hierarchical cell texture for the PS foam based on the supercritical CO2 foaming. The results demonstrated that the nanocomposite could act as an efficient CO2 capturer enabling the random release of it during the foaming process. In contrast to the pure PS foam, the ATP/PPy nanocomposite reinforced PS foam is endowed with high cell density (up to 1.9 × 106) and similar thermal conductivity as the neat PS foam, as well as high compression modulus. Therefore, the in situ polymerized ATP/PPy nanocomposite makes supercritical CO2 foaming desired candidate to replace the widely used fluorocarbons and chlorofluorocarbons as PS blowing agents.

Optical Characteristics of Chemically Prepared ZnO Nanostructures on Silica Modified Polyaniline Nanocomposites

2014 ◽  
Vol 548-549 ◽  
pp. 196-200 ◽  
Author(s):  
Katherine M. Emphasis ◽  
Reynaldo M. Vequizo ◽  
Rolando T. Canditato ◽  
Majvell Kay G. Odarve ◽  
Filchito Renè G. Bagsican ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Chemical Bath Deposition ◽  
In Situ Polymerization ◽  
Visible Region ◽  
Optical Characteristics ◽  
Zno Nanostructures ◽  
Vis Spectroscopy

Zinc oxide (ZnO) on silica modified polyaniline (SM-PANI) was prepared via chemical bath deposition and in situ polymerization. The optical characteristics of the nanocomposites were investigated using ultraviolet-visible (UV-Vis) spectroscopy. The bands showed higher absorbance in the visible region. Fourier transform infrared (FTIR) spectroscopy revealed that there is an interaction between SM-PANI and ZnO.

Preparation of Polyaniline @ Polypyrrole Conductive Composite via In Situ Polymerization

2013 ◽  
Vol 562-565 ◽  
pp. 1137-1142
Author(s):  
Hui Xia Feng ◽  
Bing Wang ◽  
Lin Tan ◽  
Na Li Chen
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
In Situ Polymerization ◽  
Conductive Composite ◽  
The Core ◽  
Novel Method ◽  
Scanning Electron

We prepared the polyaniline@polypyrrole (PAn@PPy) conductive composite by a novel method. The struction like Pre-prepared PAn as the core and PPy as the shell for the composite has been prepared by in-situ polymerization. The PAn@PPy conductive composite presents an electrical conductivity of 12.5 S/cm, which is much higher than pure PAn. The synthesized polymer composites are characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermogravimetric analysis (TG). The results indicated that PPy successfully grafted on PAn and the heat resistance of nanocomposite is remarkably increased.

scholarly journals Using In Situ Polymerization to Increase Puncture Resistance and Induce Reversible Formability in Silk Membranes

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2252 ◽  
Author(s):  
Nicholas S. Emonson ◽  
Daniel J. Eyckens ◽  
Benjamin J. Allardyce ◽  
Andreas Hendlmeier ◽  
Melissa K. Stanfield ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
In Situ Polymerization ◽  
Tensile Modulus ◽  
Needle Puncture ◽  
Puncture Resistance ◽  
Potential Applications ◽  
Novel Material ◽  
Medical Materials ◽  
Surface Modified

Silk fibroin is an excellent biopolymer for application in a variety of areas, such as textiles, medicine, composites and as a novel material for additive manufacturing. In this work, silk membranes were surface modified by in situ polymerization of aqueous acrylic acid, initiated by the reduction of various aryldiazonium salts with vitamin C. Treatment times of 20 min gave membranes which possessed increased tensile strength, tensile modulus, and showed significant increased resistance to needle puncture (+131%), relative to ‘untreated’ standards. Most interestingly, the treated silk membranes were able to be reversibly formed into various shapes via the hydration and plasticizing of the surface bound poly(acrylic acid), by simply steaming the modified membranes. These membranes and their unique properties have potential applications in advanced textiles, and as medical materials.

Preparation and Characterization of Conductive Polyaniline/Cerium Dioxide Composites

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.

scholarly journals Reaction Mechanism and kinetics of In-Situ Polymerization of Pyrrole onto Textiles: A Review

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Subhankar Maity
Keyword(s):  
In Situ Polymerization ◽  
Conductive Polymers ◽  
Textile Composites ◽  
Electrochromic Devices ◽  
Factors Affecting ◽  
Chemical Polymerization ◽  
Textile Materials ◽  
Potential Applications ◽  
Kinetics Of

Research of electro-conductive textiles based on conductive polymers like polypyrrole, has increased in the recent years due to their high potential applications in various field. Conductive polymers behave like insulator in their neutral states with typical electrical conductivity in the range 10-10 to 10-25 Scm-1. These neutral polymers can be converted into semi-conductive or conductive states with conductivities range of 1 Scm-1 to 10-4 Scm-1 through chemical or electro-chemical redox reactions. By the applications of these polymers onto a textile surface, we can be able to obtain novel composites which are strong, flexible, light weight and highly electro-conductive. These textile composites are suitable for applications such as heating pads, sensors, corrosion-protecting materials, actuators, electrochromic devices, EMI shielding etc. The methods of applications of conductive polymers onto the textile surface such as in-situ chemical, in-situ electro-chemical, in-situ vapor phase, in-situ polymerization in a supercritical fluid, solution coating process are described here briefly. Merits and demerits of these methods are mentioned here. Reaction mechanisms of chemical and electro-chemical polymerization proposed by the different researcher are described. Different factors affecting the kinetics of chemical and electro-chemical polymerization are accounted. Influence of textile materials on the kinetics of chemical polymerization is reviewed and reported.

Preparation of Jasmine Microcapsules and Aroma Finishing of Cotton Fabrics by UV-Curing

2011 ◽  
Vol 331 ◽  
pp. 306-309 ◽  
Author(s):  
Ning Xu ◽  
Dan Yu ◽  
Wei Wang
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
In Situ Polymerization ◽  
Uv Curing ◽  
Cotton Fabrics ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Finishing Process ◽  
Curing Method

In this paper, jasmine microcapsule was synthesized by in-situ polymerization and was applied on cotton fabric with UV curing method. The jasmine microcapsule was verified by Fourier transform infrared spectroscopy. Size distribution was evaluated using particle size analysis. The finishing durability was studied by human olfactory sensations and an optimal finishing process was determined. The results suggest that UV curing will be promising for use in aroma finishing.

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

2019 ◽  
Vol 27 (9) ◽  
pp. 609-618
Author(s):  
C Karikal Chozhan ◽  
A Chandramohan ◽  
M Alagar
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
In Situ Polymerization ◽  
Cyanate Ester ◽  
Polymer Matrices ◽  
Morphological Properties ◽  
Hybrid Polymer ◽  
Flame Resistance

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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