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Huang K.,CAF Institute of Chemical Industry of Forest Products | Xia J.-L.,CAF Institute of Chemical Industry of Forest Products | Xia J.-L.,Key and Open Laboratory of Forest Chemical Engineering | Ding H.-Y.,CAF Institute of Chemical Industry of Forest Products | Li M.,CAF Institute of Chemical Industry of Forest Products
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2010

Sucrose polyether polyol (SPEPO) grafted with C12-14 alkyl glycidyl ether (1214GE) copolymers (SPEPO-g-1214GE), as a compatibilizer for epoxy-asphalt composites cured by 4, 4-diphenylmethane (DDM), was synthesized and characterized by Fourier transform infrared spectrum(FT-IR), nuclear magnetic resonance spectrum (1H-NMR and 13C-NMR). And the compatibilization in epoxy-asphalt blends of these copolymers were studied. According to the Nielson model, DMA results indicate that SPEPO-g-1214GE increases the thickness of the interface between epoxy matrix and the asphalt phase. The modulus of the composites enhances 20% compared to the composites in which no compatibilization is added. Tensile strength and impact strength of the blends presented for SPEPO-g-1214GE are higher than that of the blends in which no compatibilizer is attempted. The blend with 4% SPEPO-g-1214GE results in the best performance in tensile strength and impact strength. Scanning electron microscope (SEM) reveals that higher content of SPEPO-g-1214GE in the epoxy asphalt composite results in smaller phase size of the blends corresponding to the samples containing 0%~4% SPEPO-g-1214GE. Source


Cui H.-H.,Key and Open Laboratory of Forest Chemical Engineering | Fang G.-G.,Key and Open Laboratory of Forest Chemical Engineering
Chemistry and Industry of Forest Products | Year: 2015

The identification of eucalyptus and acacia wood and classification among six kinds of wood were studied in this paper, based on near-infrared spectroscopy method combined with chemometrics algorithm. Firstly, near-infrared spectra of 86 samples, containing Eucalyptus urophylla×E. grondis, E. urophylla L11, E. urophylla U6, E. globules, Acacia mangium and A. crassicarpa. were collected, Then partial least squares discriminant analysis (PLS-DA) was used to establish a classification model of eucalyptus and acacia. The results showed that the regression lines between predicted value and actual value of calibration set and validation set were in good agreement, and the coefficient of determination (R2) were 0.99 and 0.97. This showed that the model was better. Moreover, the accuracy of the unknown samples was 100%. MSC and Savitzky-Golay smoothing method were used to pretreat the spectral of 4000-7500 cm-1, and discrimination model was established based on the principal component analysis (PCA). Results showed that the recognition rate of the calibration and validation model was 100%. Therefore, the chemometrics algorithm based on near infrared spectra could identify the eucalyptus and acacia species quickly. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved. Source


Xie Z.-H.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Key and Open Laboratory of Forest Chemical Engineering | Jin L.-W.,Beijing Institute of Technology
Chemistry and Industry of Forest Products | Year: 2014

Composites of acetylated wood flour (AWF)/low-density polyethylene (LDPE) were prepared by extrusion-injection molding process, and cardanol acetate (CA) and epoxy cardanol acetate (ECA) were added respectively. Properties such as tensile strength and hydrophobic as well as surface energy, migration of plasticizers and thermal mechanical properties (TMA) were studied. The results showed that the tensile strength of composites decreased with the increasing content of plasticizers, but tensile strength of all composites with CA were higher than that of composites with ECA. Composites with 5% plasticizers showed similar hydrophobicity, but composites with 15% CA was more hydrophobic, and contact angle test showed the similar results. The migration test of plasticizers revealed ECA had lower transfer constant (4.35×10-4) than that of CA (5.48×10-4) at 85℃ in 100 min, and ECA retained more in the composites after 3 700 min. The result of TMA exhibited the inflation of composites intensified with increasing temperature, and composites with 15% ECA showed higher coefficient of linear expansion (3 758 μm/(m·℃)) than that of composites with CA (3 182 μm/(m·℃)). ©, 2014, Editorial Board of "Chemistry and Industry of Forest Products". All right reserved. Source


Xu T.,Key and Open Laboratory of Forest Chemical Engineering | Liu H.,Key and Open Laboratory of Forest Chemical Engineering | Shang S.-B.,Key and Open Laboratory of Forest Chemical Engineering | Song Z.-Q.,Key and Open Laboratory of Forest Chemical Engineering
Chemistry and Industry of Forest Products | Year: 2015

Hydrogenated rosin (HR) modified vinyl polysiloxane (HR-VMS) was firstly synthesized from HR, hexamethyldisiloxane (MM), 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane (D4Vi), octamethyl cyclotetrasiloxane (D4) and hydrolyzate of γ-aminopropyl(diethoxy)methylsilane (HAPMS). The novel resin (HR-VMS) was further characterized by 1H NMR, 13C NMR and FT-IR. The curing behavior of HR-VMS with 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane (DBPH) as the curing agent was studied by differential scanning calorimetry (DSC). The low-temperature resistance and high-temperature thermal stability of the curing product were studied by DSC and TG, respectively. The results showed that at the heating rate of 10℃/min, the peak-top temperature of exothermic peak for HR-VMS was 186.9℃ with the exothermic value of 100.3 J/g. The curing product from HR-VMS showed better high-temperature thermal stability compared with VMS, and the temperature corresponding to its maximum weight loss rate was 436.1℃ which was 68℃ higher than that of common vinyl polysiloxane resin. © 2015, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved. Source


Yuan J.-J.,Key and Open Laboratory of Forest Chemical Engineering | Ye J.-Z.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-Z.,Key and Open Laboratory of Forest Chemical Engineering | Wang C.-Z.,Beijing Institute of Technology | Lu L.,Hubei Academy of Forestry
Chemistry and Industry of Forest Products | Year: 2015

Chemical syntheses of hydroxytyrosol from different materials were investigated. Its disadvantages included long route, the low yield of product, and expensive catalyst as well as toxic reactants, etc.. This paper emphatically summarized biological synthetic routes for hydroxytyrosol with oleuropein and tyrosol. Furthermore, the syntheses and biological activities of hydroxytyrosol alkyl ether, lipophilic fatty acid ester, and glucoside derivatives, and structure-activity relationship were introduced. It is important to further study the syntheses of hydroxytyrosol and derivatives, and exploit new medicine of anti-tumor, anticancer, cardiovascular and cerebrovascular diseases. ©, 2015, Edited & Published by Editorial Board of «Chemistry and Industry of Forest Products». All right reserved. Source

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