Shanghai Sunny New Technology Development Co.

Shanghai, China

Shanghai Sunny New Technology Development Co.

Shanghai, China

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Wang R.-Y.,Shanghai University of Electric Power | Chen X.-D.,Shanghai University of Electric Power | Chen X.-D.,Shanghai Sunny New Technology Development Co. | Xu Q.-J.,Shanghai University of Electric Power | And 2 more authors.
Journal of Polymer Engineering | Year: 2014

Polyethylene terephthalate (PET) is a kind of high performance engineering plastic. However, the application of pure PET is subject to limitation because of its slow crystallization rate. In order to overcome this difficulty, thermoplastic resins are often added into PET matrix by a compounding technique. Polybutylene terephthalate (PBT) possesses many advantages such as a high degree of crystallinity and rapid molding, thus, is very suitable to adjust the crystallization behaviors of PET. In this work, the crystallization behaviors of PET/PBT alloys were studied by a differential scanning calorimeter (DSC) and thermal platform polarizing microscope. The obtained results indicate that the content of PBT could tune the melting and crystallization behaviors of the alloy. The parameters of non-isothermal crystallization of the alloys for blends were analyzed by the Jeziorny and Kissinger methods. The non-isothermal crystallization process for PET, PBT and PET/PBT alloys fit the Jeziorny model well at the early stage, but there is a certain small deviation at the later stage, indicating that the nucleation mechanism of PET/PBT alloy is complicated. In addition, the crystallization rate accelerates with an increase in cooling rate. The alloys show the best crystallization performance when the content of PBT is 10 wt%, and their crystallization activation energy reaches up to -201.78 kJ/mol.


Wang R.Y.,Shanghai University of Electric Power | Chen X.D.,Shanghai Sunny New Technology Development Co. | Xu Q.J.,Shanghai University of Electric Power
Advanced Materials Research | Year: 2014

This paper introduces the characteristics and application of polybutylene terephthalate, and then focus on the researches to remove its disadvantages. On this basis, we discuss the influence of different modification methods on the properties of polybutylene terephthalate, and the prospect of the modification has been described as well. © (2014) Trans Tech Publications, Switzerland.


Qiao X.,Shanghai JiaoTong University | Lu X.,Shanghai JiaoTong University | Gong X.,Anhui University of Science and Technology | Yang T.,Shanghai Sunny New Technology Development Co. | And 2 more authors.
Polymer Testing | Year: 2015

Isotropic and anisotropic thermoplastic magnetorheological elastomer (MRE) composites were prepared by melt blending carbonyl iron (CI) particles with poly(styrene-b-ethylene-co-butylene-b-styrene) (SEBS) matrix in the absence and presence of a magnetic field. Effects of CI concentration and processing conditions on the microstructure, thermal stability, mechanical properties, viscoelastic properties and magnetorheological properties of these MRE composites based on SEBS were investigated. Adding magnetic CI particles significantly improves the thermal stability and mechanical strength of SEBS matrix, but does not sacrifice the elasticity and toughness. The CI/SEBS composites, prepared with greater CI concentration at higher temperature, longer time and stronger magnetic field for pre-structuring, exhibit higher field induced modulus change and greater magnetorheological effect, due to the strengthening of mutual particle interactions and the formation of longer and more ordered chain structures. © 2015 Elsevier Ltd. All rights reserved.


Lu X.,Shanghai JiaoTong University | Qiao X.,Shanghai JiaoTong University | Watanabe H.,Kyoto University | Gong X.,Anhui University of Science and Technology | And 9 more authors.
Rheologica Acta | Year: 2012

Novel smart thermoplastic magnetorheological elastomer composites containing micron-sized magnetic carbonyl iron (CI) particles were prepared with a poly(styrene-ethylene-butylene-styrene) (SEBS) triblock copolymer utilized as the thermoplastic matrix rubber, and the structures and properties of the CI-SEBS composites were examined. The CI particles were uniformly dispersed in the composites prepared in the absence of the magnetic field at high temperatures T (>T g S), and this isotropic composite exhibited a larger storage modulus G ′ compared to the SEBS matrix at room temperature (≪T g S) where the EB phase therein was rubbery while the PS phase was in the glassy state. In contrast, the SEBS composite prepared under the magnetic field (with the intensity ψ < 2.5 T) at high T (>T g S) contained a chain structure of CI particles. This chain structure became longer and better aligned on an increase of ψ up to a saturation of the particle magnetization and on an increase of the time interval of applying the field (that allowed the particles to move and equilibrate their aligned structure). The modulus G ′ of this "pre-structured" composite measured for both cases of ψ = 0 and ψ > 0 in the direction perpendicular to the chain structure at room temperature was enhanced compared to G ′ of the isotropic composites. This difference of the filler effect (for ψ = 0) and the magnetorheological effect (for ψ > 0) between the pre-structured and isotropic composites was enhanced when the chain structure of the CI particles in the pre-structured composites became longer and better aligned. A mechanism(s) of this enhancement was discussed in relation to the morphologies (particle distribution) in the composites with the aid of a filler model and a molecular expression of the stress due to magnetically interacting particles. © 2011 Springer-Verlag.


Lu X.,Shanghai JiaoTong University | Qiao X.,Shanghai JiaoTong University | Yang T.,Shanghai Sunny New Technology Development Co. | Sun K.,Shanghai JiaoTong University | Chen X.,Shanghai Sunny New Technology Development Co.
Journal of Applied Polymer Science | Year: 2011

Melamine cyanurate (MCA) was utilized as an environmental friendly additive to prepare the nonhalogen flame retardant MCA/Nylon 66 composites by melt blending technique. Because of the strong hydrogen bond interactions and fine interfacial compatibility between MCA and Nylon 66, the resultant even dispersion of MCA filler in polymer matrix leads to the better toughness and strength of MCA/Nylon 66 composites than those of neat Nylon 66. Both Nylon 66 and MCA/Nylon 66 composites exhibit similar α-crystalline structure, but the presence of MCA influences the distribution of α1 and α2 crystalline phases in Nylon 66 by inducing its hydrogen-bonded sheet separation. Moreover, the blending of MCA and Nylon 66 increases the crystallization temperature and exothermicity but decreases the thermal stability of Nylon 66 and accelerates the degradation of MCA. The MCA/Nylon 66 composites show better flame retardancy at intermediate MCA contents of 10 and 15 wt %. © 2011 Wiley Periodicals, Inc.


Li W.,University of Wollongong | Qiao X.,Shanghai JiaoTong University | Lu X.,Shanghai JiaoTong University | Chen J.,University of Wollongong | And 5 more authors.
Smart Materials and Structures | Year: 2012

Novel isotropic and anisotropic thermoplastic magnetorheological elastomers (MRE) were prepared by melt blending titanated coupling agent modified carbonyl iron (CI) particles with poly(styrene-b-ethylene-ethylene-propylene-b-styrene) (SEEPS) matrix in the absence and presence of a magnetic field, and the microstructure and magnetorheological properties of these SEEPS-based MRE were investigated in detail. The particle surface modification improves the dispersion of the particles in the matrix and remarkably softens the CI/SEEPS composites, thus significantly enhancing the MR effect and improving the processability of these SEEPS-based MRE. A microstructural model was proposed to describe the interfacial compatibility mechanism that occurred in the CI/SEEPS composites after titanate coupling agent modification, and validity of this model was also demonstrated through adsorption tests of unmodified and surface-modified CI particles. © 2012 IOP Publishing Ltd.


Fu J.-H.,Shanghai University of Electric Power | Chen X.-D.,Shanghai University of Electric Power | Chen X.-D.,Shanghai Sunny New Technology Development Co. | Xu Q.-J.,Shanghai University of Electric Power | And 2 more authors.
Polymer Composites | Year: 2016

In this article, the Surlyn® 8920 and AX 8900 were mixed as hybrid nucleating agents for glass fiber (GF)-reinforced polyethylene terephthalate (PET)/polybutylene terephthalate (PBT) alloy. The crystallization behaviors on GF-reinforced PET/PBT alloy with compound nucleating agents of Surlyn® 8920 and AX 8900 were studied by differential scanning calorimeter. The Jeziorny method, Mo method, and Kissinger method were used for studying the non-isothermal crystallization process of the composite alloys. While single AX 8900 cannot further improve the crystallization properties of the alloy and reduced the crystallization rate, the introduction of Surlyn® 8920 can effectively ameliorate the condition. The results demonstrated the hybrid nucleating agents of Surlyn® 8920 and AX 8900 not only can accelerate crystal growth, but also can significantly reduce the energy barrier, and it has a good effect in the alloy to the nucleation. © 2014 Society of Plastics Engineers.

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