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Two-step cavitation in semi-crystalline polymer during stretching at temperature below glass transition

Chen, Ran; Lu, Ying; Zhao, Jiayi; Jiang, Zhiyong; Men, Yongfeng

Customer publications

Two-step cavitation in semi-crystalline polymer during stretching at temperature below glass transition

Chen, Ran; Lu, Ying; Zhao, Jiayi; Jiang, Zhiyong; Men, Yongfeng

Cavitation behavior in poly(4-methyl-1-pentene) upon stretching below glass transition temperature was investigated by in situ ultra-small angle X-ray scattering technique. Strong stress-whitening was observed indicating an extensive occurrence of cavitation in the material during tensile deformation below Tg. The X-ray scattering patterns suggest oriented disc-shaped cavities with normal mostly…
Tuning the morphology of functionalized silica using amphiphilic organosilanes

Besnard, Romain; Arrachart, Guilhem; Cambedouzou, Julien; Pellet-Rostaing, Stéphane

Customer publications

Tuning the morphology of functionalized silica using amphiphilic organosilanes

Besnard, Romain; Arrachart, Guilhem; Cambedouzou, Julien; Pellet-Rostaing, Stéphane

The co-condensation of tetraethoxysilane and an amphiphilic organosilane precursor containing an ammonium part is investigated in presence of different counter-ions. We highlight the morphological versatility offered by such “one pot” synthesis, resulting of the combinatory effects of the addition of tetraethoxysilane and of the nature of the counter-ion involved in…
Tunable Self-Assembly and Morphology-Dependent Photoconductivity of a Donor–Acceptor-Structured Diruthenium Complex

Sun, Meng-Jia; Zhang, Xinliang; Zhong, Yu-Wu; Zhan, Chuanlang; Yao, Jiannian

Customer publications

Tunable Self-Assembly and Morphology-Dependent Photoconductivity of a Donor–Acceptor-Structured Diruthenium Complex

Sun, Meng-Jia; Zhang, Xinliang; Zhong, Yu-Wu; Zhan, Chuanlang; Yao, Jiannian

A donor–acceptor-structured diruthenium complex, 1(PF6)4, that contains an electron-deficient bridging ligand and electron-rich distal diarylamines modified with long aliphatic chains has been synthesized. By varying the solvent environments and assembly conditions, we obtained three different self-assembled nanostructures of 1(PF6)4, including zero-dimensional nanospheres, one-dimensional…
Triblock Copolymer Elastomers with Enhanced Mechanical Properties Synthesized by RAFT Polymerization and Subsequent Quaternization through Incorporation of a Comonomer with Imidazole Groups of about 2.0 Mass Percentage

Jiang, Feng; Fang, Chu; Zhang, Juan; Wang, Wentao; Wang, Zhigang

Customer publications

Triblock Copolymer Elastomers with Enhanced Mechanical Properties Synthesized by RAFT Polymerization and Subsequent Quaternization through Incorporation of a Comonomer with Imidazole Groups of about 2.0 Mass Percentage

Jiang, Feng; Fang, Chu; Zhang, Juan; Wang, Wentao; Wang, Zhigang

ABA triblock copolymer elastomers (TBCPEs) were first synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization, for which poly(isobornyl acrylate) (PIBA) was chosen as the dispersed hard microdomains, whereas poly(n-butyl acrylate)-co-poly(1-vinylimidazole) (P(BA-co-VI)) was chosen as the rubbery matrix. Two much distinct glass transition temperatures were found,…
Toward surfactant-free and water-free microemulsions

Fischer, Veronika; Marcus, Julien; Touraud, Didier; Diat, Olivier; Kunz, Werner

Customer publications

Toward surfactant-free and water-free microemulsions

Fischer, Veronika; Marcus, Julien; Touraud, Didier; Diat, Olivier; Kunz, Werner

It was recently demonstrated that a nano-clustering was present in the monophasic “pre-Ouzo” region of ternary liquid mixtures without surfactants. The goal of this work is to check if this nano-clustering is also present in the surfactant-free and water-free “green” microemulsions glycerol/ethanol/1-octanol and deep eutectic solvent/tetrahydrofurfuryl alcohol/diethyl adipate. The deep…
Toughening biodegradable polylactide with nanopores

Peng, Ningxing; Ju, Yunhui; Lv, Ruihua; Na, Bing; Liu, Qingxian; Wang, Bin

Customer publications

Toughening biodegradable polylactide with nanopores

Peng, Ningxing; Ju, Yunhui; Lv, Ruihua; Na, Bing; Liu, Qingxian; Wang, Bin

The inherent brittleness of biodegradable polylactide (PLA) limits its large-scale applications. A common route for toughening PLA is to incorporate other components by blending. In achieving good toughness, however, other properties such as strength and transparency are usually sacrificed to a large extent. Here we presented a facile approach to…
TNF Induced Switching of Columnar Rectangular to Hexagonal Assemblies in a New Class of Triphenylene-Based Room Temperature Discotic Liquid Crystals

Gupta, Monika; Gupta, Santosh Prasad; Pal, Santanu Kumar

Customer publications

TNF Induced Switching of Columnar Rectangular to Hexagonal Assemblies in a New Class of Triphenylene-Based Room Temperature Discotic Liquid Crystals

Gupta, Monika; Gupta, Santosh Prasad; Pal, Santanu Kumar

A straightforward synthesis of triphenylene-based oligomeric systems that self-organize into room temperature columnar structures is presented. The compounds with longer spacer length (m = 10 and 12) exhibit columnar rectangular (Colr) mesophase whereas the compound with m = 8 exists in glassy Colr state. Interestingly, the Colr self-assembly of these…
The Template Determines Whether Chemically Identical Nanoparticle Scaffolds Show Elastic Recovery or Plastic Failure

Suresh, Karthika; Patil, Shivprasad; Ramanpillai Rajamohanan, Pattuparambil; Kumaraswamy, Guruswamy

Customer publications

The Template Determines Whether Chemically Identical Nanoparticle Scaffolds Show Elastic Recovery or Plastic Failure

Suresh, Karthika; Patil, Shivprasad; Ramanpillai Rajamohanan, Pattuparambil; Kumaraswamy, Guruswamy

Subtle variations in the preparation of ice-templated nanoparticle assemblies yield monoliths that are chemically identical but exhibit qualitatively different mechanical behavior. We ice template aqueous dispersions to prepare macroporous monoliths largely comprising silica nanoparticles held together by a crosslinked polymer mesh. When the polymer is crosslinked in the presence of…