Shanxi Provincial Institute of Chemical Industry

Taiyuan, China

Shanxi Provincial Institute of Chemical Industry

Taiyuan, China
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Ding S.,Ningxia University | Luo F.,Ningxia University | Wang K.,Shanxi Provincial Institute of Chemical Industry | Xing Q.,Beijing Technology and Business University | And 3 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2016

In order to solve the problem of slow crystallization rate and low impact strength, the nucleating agent TMC-210 was introduced into poly(L-lactic acid)(PLLA) via melt blend. The effects of TMC-210 on crystallization, melting behavior, and mechanical properties of PLLA were investigated. It is found that pure PLLA has no crystallization peak upon cooling at 10℃/min. However, with loading 0.2% TMC-210, PLLA can complete crystallization, and the crystallization peak shifts to higher temperature with increasing the TMC-210 content. Isothermal crystallization analysis reveals that the addition of TMC-210 leads to shorter crystallization time and faster crystallization rate of PLLA. Besides, the nucleation density of PLLA increases and the spherulite size decreases. When the TMC-210 mass fraction is 0.2%, the impact strength of PLLA is enhanced by 3.3 times. Therefore, adding nucleating agent TMC-210 is an effective approach to promote the crystallization rate and impact strength of PLLA. © 2016, Editorial Board of Polymer Materials Science & Engineering. All right reserved.


Shen Z.,Ningxia University | Luo F.,Ningxia University | Xing Q.,Beijing Technology and Business University | Si P.,Ningxia University | And 4 more authors.
CrystEngComm | Year: 2016

Poly(ethylene terephthalate) (PET) and aryl amide derivative (TMB-5) blends were prepared by melt blending. It was found that TMB-5 shows a significant nucleation effect on PET and especially the non-isothermal nucleation efficiency reached up to 80.7% at a very low content of 0.6 wt% TMB-5. The effects of TMB-5 on the crystallization behavior and mechanical properties of PET were systematically investigated. DSC results show that crystallization temperature of PET apparently increased by nearly 20 °C with the addition of 0.6 wt% TMB-5 during the cooling process. A remarkable acceleration in the crystallization rate of PET was achieved as analyzed using the Avrami equation. Wide angle X-ray diffraction (WAXD) and polarized optical microscopy (POM) results show that the addition of TMB-5 remarkably increases the crystallinity and nuclei density of PET. Small angle X-ray scattering (SAXS) measurements reveal that the long period of PET decreased and lamellar thickness increased with an increase in TMB-5 content. The impact strength of PET was greatly enhanced by the addition of TMB-5, and a toughening mechanism was proposed. © The Royal Society of Chemistry 2016.


Dai J.-M.,Taiyuan University of Technology | Zhu Y.,Shanxi Provincial Institute of Chemical Industry
Wool Textile Journal | Year: 2011

The ultrafine wool was modified by Ag-loading nano-Si02 solution with ultraviolet light corroding and coupling agent KH-560 treating to get Ag-loading nano-Si02/ultrafine wool composite whose surface form an antibacterial layer. After testing the clothing properties of ultrafine wool and nanotreated ultrafine wool, the results showed that the major properties of modified ultrafine wool were improved, such as the fibers' surface became homogeneous, the length increased by 6. 18% , the fineness decreased by 4. 41% , the single fiber breaking strength increased by 22. 84% , the elastic reversion ratio increased by 7. 58% , the static frictional effectiveness decreased by 16. 25% and the antibacterial ratio against E. coli and S. aureus was above 96% . Discussing the influence of Ag-loading nano-Si02 on clothing properties of ultrafine wool, suggesting that the quality and mechanical function of ultrafine wool and its fabric were improved. Moreover, it was much more comfortable for clothing and the additional value was also raised greatly.


Tong Y.,Taiyuan University of Technology | Lv Z.,Taiyuan University of Technology | Guo X.,Shanxi Provincial Institute of Chemical Industry | Yu X.,Taiyuan University of Technology | And 2 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2013

Using polytetramethylene glycol (PTMG) and polyethylene glycol adipate (PEA) as mixed soft segments, polyurethanes (PUs) were designed by different preparation methods. Dynamic mechanical analysis (DMA) was used to investigate the micro-phase separation of PUs. One method was that the prepolymer was prepared with the mixed polyols containing PEA and PTMG with some ratio, then 4, 4'-methylene-2-ortho-dichloroaniline (MOCA) was used as the chain extender, PUs were obtained. The second method was that the two kinds of prepolymers were prepared with PEA and PTMG respectively. MOCA was used to extend the two pre-polymers. After reacted for 3 min~6 min, the two parts were incorporated and molded to prepare PUs. The DMA test results show that loss modulus and glass transition temperature of PU are influenced by the preparation method to a large extent. The micro-structure of PUs can be influenced by preparation method.


Sun Y.,Taiyuan University of Technology | Han H.,Shanxi Provincial Institute of Chemical Industry | Liu L.,Shanxi Provincial Institute of Chemical Industry | Jia L.,Shanxi Provincial Institute of Chemical Industry
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2013

Organically modified attapulgite (OAT)/polyurethane nanocomposites were prepared by intercalative polymerization method. The surface structure of the organic modified attapulgite was characterized by FT-IR. The mechanical properties, heat resistance of nanocomposite and the dispersion state of nano particles in the composites were studied. The results reveal that when the mass fraction of organic modified attapulgite is 2%, the composites have the best comprehensive mechanical properties with the tensile strength about 55.91 MPa, the elongation at break about 559.45%, the 300% stretching strength about 31.69 MPa and the hardness almost unchanged, and the thermal stability is improved. The morphology of organic modified attapulgite is the most discrete in polyurethane matrix when the mass fraction of the modified attapulgite is below 2%, and the agglomeration of organic modified attapulgite appears with the increase of its content.


Yu X.,Taiyuan University of Technology | Lv Z.,Taiyuan University of Technology | Tong Y.,Taiyuan University of Technology | Yang R.,Shanxi Provincial Institute of Chemical Industry
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2013

Polyurethanes(PUs) developed from polytetramethylene glycol (PTMG), toluene 2, 4-diisocyanate (TDI-100), 3, 5-dimethyl mercapto toluenediamine (E-300) and different inorganic particles were prepared by prepolymerization method. Dynamic mechanical analysis(DMA) was used to investigate the effects of inorganic particles on microphase separation and its relationship with mechanical properties. The results show that adding inorganic particles in PUs can enhance microphase separation and significantly improve tear resistance performances. Besides, among PU/SiO2, PU/CNTs and PU/zeolite molecular sieve 13X composites, carbon nanotubes(CNTs) represents the greatest effect on the microphase separation between hard and soft segments of PU. And the glass transition temperature (Tg) of soft segments (obtained from tanδ-T curve) in PU/CNTs composites decreases by 17.18°C compared to that of pure PU.


Zhang Z.,Research Center for Engineering Technology of Polymeric Composites | Zhang Z.,North University of China | Zhang H.,Research Center for Engineering Technology of Polymeric Composites | Zhang H.,North University of China | And 15 more authors.
Polymer Composites | Year: 2016

Elastomeric polyurethane (PU) was mixed with 0, 10, 15, 20, 25, and 30 wt% of graphite to obtain PUE-based composites. The structure of PU/graphite elastomer was characterized by scanning electron microscopy. It was found that the polyurethane elastomer (PUE) molecular chains were intercalated into the graphite layers and evenly distributed in the matrix. When the graphite content was lower it could make full use of its strength with some loss of plasticity; when the graphite content was too high, the friction between graphite and PUE increased and hence it is more difficult for the macromolecular chain reaction. The polymer was more unstable as a whole. Furthermore, the thermal and mechanical properties of the obtained products were investigated in detail. The result showed that the thermal stability of PUE was improved by the introduction of the graphite. The softening temperature of the PUE/graphite containing 10% graphite was 11°C higher than that of pure PUE. At the same time, the hardness, tensile strength, elongation, 300% tensile modulus, tearing strength of PU/graphite elastomer were also investigated. © 2014 Society of Plastics Engineers.


Shen Z.,Ningxia University | Luo F.,Ningxia University | Lei X.,Ningxia University | Ji L.,Ningxia University | Wang K.,Shanxi Provincial Institute of Chemical Industry
Journal of Polymer Research | Year: 2016

Low crystallization rate and inherent brittleness characteristics limit the wide application of PET. In this paper, it was found that a low molecular weight Phenyl phosphonic acid salts compound (TMC-210) is a very effective nucleator and can enhance the impact strength very much. So, the effect of TMC-210 on the crystallization behaviour and mechanical properties of poly(ethylene terephthalate) were systematically evaluated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), wide angle X-ray diffraction (WAXD), scanning electron microscope (SEM) and mechanical properties test. The results show that TMC-210 obviously improves the crystallization temperature and accelerates the crystallization rate of PET and reflects a significant heterogeneous nucleating effect with a nucleation efficiency of 99.8 % when introducing a low content of 0.6 wt% TMC-210. The spherulites size and number of blended PET are greater than pure PET. The crystal structure of PET does not change but the blends with high TMC-210 content appears new diffraction peaks in x-ray diffraction spectrogram and it may attribute to the agglomeration of TMC-210 particles, which is verified by SEM observation. The impact fracture surface of PET develops a brittle ductile transition and thus the impact strength of PET improves significantly. Additionally, Lauritzen–Hoffman equation was used to discuss the effect of TMC-210 on the fold surface free energy (σe) of PET in the crystallization process and found that the σe values of PET/TMC-210 blends is smaller than that of pure PET. © 2016, Springer Science+Business Media Dordrecht.

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