Synthesis of New Benzoxazine from Cardanol-Furfural Resin and the Properties of the Corresponding Polymer

2011 ◽  
Vol 236-238 ◽  
pp. 317-320 ◽  
Author(s):  
Sheng Fang Li ◽  
Wei Dong Huang
Keyword(s):  
Renewable Resources ◽  
Ring Opening ◽  
Phenolic Resin ◽  
Raw Materials ◽  
Side Chain ◽  
H Nmr ◽  
Ring Opening Reaction ◽  
Yield Value ◽  
Good Heat Resistance ◽  
Good Heat

A novel benzoxazine-based phenolic resin containing furan groups and long alkyl side-chain (CFB) was synthesized using cardanol-furfural resin as phenolic raw materials. The new benzoxazine-based cardanol-furfural resin derived from renewable resources was characterized by FTIR,1H NMR spectra and Differential scanning calorimeter (DSC) etc. The thermal ring-opening reaction of the benzoxazine ring and the polymerization of the double bond were demonstrated with FTIR measurement. The thermal behavior of the cured product was also investigated with thermogravimetric analysis. The corresponding polybenzoxazine showed Tgvalue higher than that of polybenzoxazine prepared from cardanol, ammonia and formaldehyde. The char yield value at 800°C of the corresponding polybenzoxazine is 46.2% in N2atmosphere. The results showed that the polybenzoxazine cured from CFB had good heat resistance and toughness.

scholarly journals Structures and Properties of Self - crosslinking Silicone Resin

2018 ◽  
Vol 38 ◽  
pp. 02019
Author(s):  
Yong-xin Zhao ◽  
Ying-qiang Zhang
Keyword(s):  
Thermal Decomposition ◽  
Raw Materials ◽  
Decomposition Temperature ◽  
Light Transmittance ◽  
Silicone Resin ◽  
Structures And Properties ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Good Heat Resistance ◽  
Good Heat

Highly transparent silicone resin with self-crosslinking structure was prepared using phenyltrimethoxysilane, diphenyldimethoxysilane, 1,3,5,7-cyclotetra(methyl siloxane) and bisvinyltetramethyldisiloxane as main raw materials. The structure of silicone resin was determined by Fourier Transform Infrared Spectroscopy (FT-IR). The light transmittance was measured by UV-Vis spectroscopy. Thermogravimetric analysis (TGA) was used to study the thermal decomposition process. The microstructure of cured self-crosslinking silicone resin is more uniform, resulting in better light transmittance up to 100% in the range of 400nm ~ 800nm. The cured has relatively good heat resistance, the initial thermal decomposition temperature of the cured could be up to 315.8 °C. SEM observations show that the self-crosslinking silicone has a uniform, textured structure, higher transparency compared with the existing condensation silicone material, and can be used as advanced architectural translucent materials and optics packaging materials.

Foam Structure of Xerogel Prepared Via Ring-Opening Reaction Between Epoxy Groups Attached on the Side Chain of Polystyrene

2007 ◽  
Vol 51 (4) ◽  
pp. 665-672 ◽  
Author(s):  
Kentaro Yamanaka ◽  
Keiji Nagai ◽  
Nobukatsu Nemoto ◽  
Kaori Nomura ◽  
Tomonori Shimoyama ◽  
...  
Keyword(s):  
Ring Opening ◽  
Side Chain ◽  
Foam Structure ◽  
Ring Opening Reaction ◽  
Epoxy Groups

Preparation, Characterization and Application of Siloxane Succinate Fatliquor

2011 ◽  
Vol 233-235 ◽  
pp. 292-297 ◽  
Author(s):  
Tao Tao Qiang ◽  
Xiang Luo ◽  
Long Fang Ren ◽  
Xue Chuan Wang ◽  
Bao Yuan He
Keyword(s):  
Molecular Structure ◽  
Mechanical Properties ◽  
Castor Oil ◽  
Ring Opening ◽  
Rapeseed Oil ◽  
Raw Materials ◽  
Decomposition Temperature ◽  
Thermal Decomposition Temperature ◽  
Dyeing Property ◽  
Ring Opening Reaction

The silicone succinate surfactant (PMPS) was synthesized by ring-opening reaction using polyether alcohol amine modified polysilosane (PAPS) with maleic anhydride (MA) as the raw materials, and p-toluenesulfonic acid (PTSA) was used as the catalyst. Sulfated castor oil and sulfated rapeseed oil were combinated with PMPS to prepare a new leather fatliqour (PMPSF) composed mainly of PMPS. The molecular structure of PMPS was characterized by FTIR spectra; the thermal properties of PMPS was characterized and analyzed by TGA. PMPSF was used in sheepskin wet blue leather and compared with oxidative sulfited vegetable oils (L-3) and RF-1 fatliquor; the waterproof and mechanical properties of the leather were measured. The results show that the thermal decomposition temperature of PMPS is 192.8°C. Fatliquor PMPSF provids a good level-dyeing property, the leather oiled by it has good flexibility and fullness, the waterproofness and mechanical properties of leather are also good. Moreover, compared with the leather fatliquored by L-3, the thickening rate of leather oiled by PMPSF reaches 13.7%.

Modification of Used Palm Oil: Preliminary Study of its Potentiality as Polyurethane Foam Precursors

2016 ◽  
Vol 705 ◽  
pp. 50-54
Author(s):  
Duangporn Riyapan ◽  
Nitinart Saetung ◽  
Anuwat Saetung
Keyword(s):  
Reaction Time ◽  
Palm Oil ◽  
Ring Opening ◽  
Chemical Structure ◽  
Increase Reaction Time ◽  
H Nmr ◽  
Pu Foam ◽  
Ring Opening Reaction ◽  
Preliminary Study ◽  
Used Palm Oil

Polyol was successfully synthesized from used palm oil (UPO) via epoxidation and ring opening reaction. The mole ratio of UPO: formic acid: hydrogen peroxide was 0.3: 8: 1.5. The reaction had been continuously stirred at 400 rpm at 65°C with varied reaction time for 0.5, 1.0, 1.5, 2.0, and 4.0 h. The chemical structure of modified used palm oil (MUPO) or polyol was confirmed by 1H-NMR. OH number of polyols increased with an increase reaction time. Moreover, the preliminary study for the preparation of MUPO-based polyurethane (PU) foam was performed. A new MUPO-based PU foam was successfully prepared and theirs foam behaviors were investigated.

scholarly journals Synthesis and Performance Evaluation of a Betaine Surfactant

2020 ◽  
Vol 213 ◽  
pp. 03012
Author(s):  
Rongjun Zhang ◽  
Zhengpeng Zhou ◽  
Xuegang Wei ◽  
Wei Wei ◽  
Xiaoke Wang ◽  
...  
Keyword(s):  
Surface Tension ◽  
Interfacial Tension ◽  
Ring Opening ◽  
Surfactant Concentration ◽  
Raw Materials ◽  
Surfactant Solution ◽  
Salt Resistance ◽  
Water Separation ◽  
Ring Opening Reaction ◽  
And Performance

Using sodium bisulfite and epichlorohydrin as raw materials, the ring-opening reaction is carried out under the action of acatalyst to produce sodium 3-chloro-2-hydroxypropane sulfonate, followed by dodecyl tertiary amine, isopropanol, sodium hydroxide and 3-chloro-2-hydroxypropane sulfonate sodium as raw materials, under certain conditions to synthesize dodecyl hydroxy sulfobetaine surfactant. The surface tension, interfacial tension, salt resistance and emulsification properties of the synthesized surfactants were tested and evaluated. The experimental results show that the surfactant has a low critical micelle concentration and surface tension; the interfacial tension decreases with the increase of surfactant concentration. When the concentration is greater than or equal to 0.3%, the interfacial tension reaches 10-2 level; the dodecyl hydroxy sulfobetaine surfactant solution shows good salt resistance; when the concentration of dodecyl hydroxy sulfobetaine surfactant solution is 0.5%, the water separation rate in 120 minutes is the lowest and the emulsification ability is the strongest.

Preparation and Characterization of Dioxanone and Poly(dioxanone)

2013 ◽  
Vol 711 ◽  
pp. 22-25
Author(s):  
Kui Lin Deng ◽  
Wen Hui Jin ◽  
Fu Chen Zhang ◽  
Chun Xiu Li ◽  
Hui Juan Shen ◽  
...  
Keyword(s):  
Ring Opening ◽  
Raw Materials ◽  
Copper Chromite ◽  
Copper Nitrate ◽  
Ring Opening Polymerization ◽  
Scanning Calorimetry ◽  
H Nmr ◽  
Dsc Measurements ◽  
Ammonium Dichromate

In this paper, the ammonium dichromate and copper nitrate were used as raw materials to prepare the copper chromite, and nanocopper chromite as a catalyst was used to synthesize the monomer dioxanone in diethylene glycol dehydrogenation. Under the strict conditions of no water and no oxygen, the stannous octoate was selected to catalyze ring-opening polymerization of the dioxanone to prepare the polydioxanone. And dioxanone and its polymers were characterized with IR spectroscopy,1H NMR spectroscopy, thermogravimetric analysis (TG) and differential scanning calorimetry (DSC ) measurements.

scholarly journals Ring-opening reaction of 2,5-dioctyldithieno[2,3-b:3',2'-d]thiophene in the presence of aryllithium reagents

2013 ◽  
Vol 9 ◽  
pp. 767-774 ◽  
Author(s):  
Hao Zhong ◽  
Jianwu Shi ◽  
Jianxun Kang ◽  
Shaomin Wang ◽  
Xinming Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ring Opening ◽  
H Nmr ◽  
Ring Opening Reaction ◽  
Ring Opening Reactions ◽  
C Nmr

In this paper, the ring-opening reaction of 2,5-dioctyldithieno[2,3-b:3',2'-d]thiophene with aryllithium in THF at low temperature to generate 2'-arylthio-3,3'-bithiophene-2-carbaldehydes is studied. Nine examples are explored and all the products are characterized by 1H NMR, 13C NMR and HRMS. The relative relationship between the structures of aryl groups and the efficiency of ring-opening reactions are discussed.

Study on Synthesis and Properties of Waterborne Polyurethane Modified by Epoxy Resin

2013 ◽  
Vol 395-396 ◽  
pp. 423-426 ◽  
Author(s):  
Zhi Ming Jin ◽  
Wen Lu Guo ◽  
Cai Hua Gao
Keyword(s):  
Epoxy Resin ◽  
Raw Materials ◽  
High Hardness ◽  
Waterborne Polyurethane ◽  
Isophorone Diisocyanate ◽  
Poly Propylene ◽  
Good Heat Resistance ◽  
Modified Epoxy ◽  
Epoxy Value ◽  
Good Heat

The waterborne polyurethane (WPU) modified by epoxy resin was synthesized by using isophorone diisocyanate (IPDI), poly propylene glycol (PPG-1000), 2,2-dimethylol propionic acid (DMPA) and epoxy resin as the main raw materials. The WPU properties were characterized by TGA, FTIR, and so on. The study shows that whennNCO/nOH=1.4, the mount of DMPA is 5.0%, the emulsifying property of WPU which is modified epoxy resin with high epoxy value is well. And when the mounts of E-20, E-44 are 2.0%, 4.0% respectively, the synthesized emulsion with small size has well stability. The modified WPU which possesses high hardness, low water absorption, good heat resistance and anticorrosion, has a well combination property.

Preparation of Cyclopentyl Trisilanol Silsesquioxanes - Modified Natural Rubber (CpSSQ(OH)3 ENR-50) Composite Hybrid in the Presence of HCL Acid

2013 ◽  
Vol 795 ◽  
pp. 251-255 ◽  
Author(s):  
Rosniza Hamzah ◽  
Mohamad Abu Bakar ◽  
Nik Noriman Zulkepli ◽  
Mohd Arif Anuar Mohd Salleh ◽  
Mohd Mustafa Al Bakri Abdullah
Keyword(s):  
Chemical Shift ◽  
Natural Rubber ◽  
Ring Opening ◽  
Silanol Group ◽  
Polymer Chains ◽  
Epoxide Ring ◽  
Proton Chemical Shift ◽  
Nmr Analysis ◽  
H Nmr ◽  
Ring Opening Reaction

A composite comprising cyclopentyl trisilanol silsesquioxanes (CpSSQ(OH)3) and 50% epoxidized natural rubber (ENR-50) was prepared at reflux temperature employed hydrochloric acid (HCl) as catalyst. HCl was found to be an effective catalyst to promote ring opening reaction of ENR-50 and tailored CpSSQ(OH)3to the ENR-50 polymer chains via chemical reaction. FTIR spectroscopy reveals a hydroxyl stretching indicating the occurrence of epoxide ring opening reaction.1H NMR analysis further proved the incorporation of CpSSQ(OH)3into ENR-50 polymer chains via shiftment of proton chemical shift and addition in the proton integrals. Si29NMR analysis evidence the Si-O-C bond through a chemical shift of silanol group from CpSSQ(OH)3.

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