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Effect of high molecular weight on pore formation and various properties of microporous membrane used for lithium-ion battery separator

Xu, Guan; Ding, Lei; Wu, Tong; Xiang, Ming; Yang, Feng

(Natural) polymersCustomer publicationsPhase analysisPolymer researchSAXS

Effect of high molecular weight on pore formation and various properties of microporous membrane used for lithium-ion battery separator

Xu, Guan; Ding, Lei; Wu, Tong; Xiang, Ming; Yang, Feng

In this article, iPP cast films with high molecular weight in middle layer were prepared to investigate the effect of high molecular weight component on pore formation and mechanical strength. The results of DSC, SEM and 2D-XRD indicated that higher molecular weight and die draw ratio (DDR) would not alter…
Study on phase transition behavior and lamellar orientation of uniaxially stretched poly(ʟ-lactide) / cellulose nanocrystal-graft-poly(d-lactide) blend

Nagarajan, Selvaraj; Hu, Jian; Wu, Hao; Duan, Yongxin; Zhang, Jianming

Customer publications

Study on phase transition behavior and lamellar orientation of uniaxially stretched poly(ʟ-lactide) / cellulose nanocrystal-graft-poly(d-lactide) blend

Nagarajan, Selvaraj; Hu, Jian; Wu, Hao; Duan, Yongxin; Zhang, Jianming

Towards the development of high-performance green composites, the surface functionalized cellulose nanocrystals (CNC) have been widely used as reinforcement along with biopolymer. In our previous work, it has been demonstrated that CNC grafted with PDLA (CNC-g-PDLA) could improve the crystal nucleation density and heat distraction ability of PLLA matrix via…
Polymerization-induced self-assembly of liquid crystalline ABC triblock copolymers with long solvophilic chains

Huo, Meng; Wan, Zhengyi; Zeng, Min; Wei, Yen; Yuan, Jinying

Customer publications

Polymerization-induced self-assembly of liquid crystalline ABC triblock copolymers with long solvophilic chains

Huo, Meng; Wan, Zhengyi; Zeng, Min; Wei, Yen; Yuan, Jinying

Understanding the self-assembly of liquid crystalline (LC) block copolymers is challenging because of the complex influencing factors. In this article, we studied the influence of the solvophilic chain length on the self-assembly of the LC ABC triblock copolymer poly(N,N-dimethylaminoethyl methacrylate)-b-poly(benzyl methacrylate)-b-poly…
Linked-Acceptor Type Conjugated Polymer for High Performance Organic Photovoltaics with an Open-Circuit Voltage Exceeding 1 V

Xia, Benzheng; Lu, Kun; Zhao, Yifan; Zhang, Jianqi; Yuan, Liu; Zhu, Lingyun; Yi, Yuanping; Wei, Zhixiang

Customer publications

Linked-Acceptor Type Conjugated Polymer for High Performance Organic Photovoltaics with an Open-Circuit Voltage Exceeding 1 V

Xia, Benzheng; Lu, Kun; Zhao, Yifan; Zhang, Jianqi; Yuan, Liu; Zhu, Lingyun; Yi, Yuanping; Wei, Zhixiang

A linked-acceptor type conjugated polymer is designed and sythesized based on 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzodithiophene (BDTT) and linked-thienopyrrole-4,6-dione (LTPD). This polymer uses alkyl-substituted thiophene as a bridge. The PBDTT-LTPD includes two TPD units in one repeating unit, which can enhance acceptor density in the polymer backbone and lower the…
Lamellar structures in fluorinated phosphonium ionic liquids: the roles of fluorination and chain length

Rauber, Daniel; Zhang, Peng; Huch, Volker; Kraus, Tobias; Hempelmann, Rolf

Customer publications

Lamellar structures in fluorinated phosphonium ionic liquids: the roles of fluorination and chain length

Rauber, Daniel; Zhang, Peng; Huch, Volker; Kraus, Tobias; Hempelmann, Rolf

Ionic liquids (ILs) exhibit tunable behaviour and properties that are due to their supramolecular structure. We synthesized a series of alkylated and fluorinated phosphonium dicyanamide ILs to study the relation between molecular structure and assembly with a focus on the roles of cation chain length and fluorination. Small angle X-ray…
Lamellar Thickness Dependence of Crystal Modification Selection in the Syndiotactic Polystyrene γ-to-α/β Phase Transition Process

Wang, Hai; Wu, Chunji; Cui, Dongmei; Men, Yongfeng

Customer publications

Lamellar Thickness Dependence of Crystal Modification Selection in the Syndiotactic Polystyrene γ-to-α/β Phase Transition Process

Wang, Hai; Wu, Chunji; Cui, Dongmei; Men, Yongfeng

The syndiotactic polystyrene (sPS) γ-to-α/β phase transition was investigated using temperature-dependent synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) measurement. The sPS γ form samples, which were obtained from acetone solvent induced crystallization followed by annealing at various temperatures (Ta), exhibited a regular manner on the selection of…
Kinetics of Nucleation and Growth of Form II to I Polymorphic Transition in Polybutene-1 as Revealed by Stepwise Annealing

Qiao, Yongna; Wang, Qiao; Men, Yongfeng

Customer publications

Kinetics of Nucleation and Growth of Form II to I Polymorphic Transition in Polybutene-1 as Revealed by Stepwise Annealing

Qiao, Yongna; Wang, Qiao; Men, Yongfeng

Kinetics of II to I polymorphic transformation in isotactic polybutene-1 (PB-1) and its annealing temperature and time dependencies have been investigated by means of differential scanning calorimetry and in situ wide-angle X-ray diffraction techniques. The PB-1 samples were isothermally crystallized into metastable form II crystalline modification followed by annealing at…