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Relation between thermal effects and structural changes under deformation of thermoplastics

Guseva, M. A.; Gerasin, V. A.; Shklyaruk, B. F.; Dubinskiy, V. A.

Customer publications

Relation between thermal effects and structural changes under deformation of thermoplastics

Guseva, M. A.; Gerasin, V. A.; Shklyaruk, B. F.; Dubinskiy, V. A.

The article reports thermal effects accompanying deformation of widely used thermoplastics: PE of different density, highly isotactic and stereodefective PP, PA6, PC. A number of structural methods (X-ray diffraction at large and small angles, DSC, IR spectroscopy, microscopy, volume measurements) were used to establish the factors underlying generation of heat…
Radiopaque Highly Stiff and Tough Shape Memory Hydrogel Microcoils for Permanent Embolization of Arteries

Zhang, Yinyu; Gao, Haijun; Wang, Hao; Xu, Ziyang; Chen, Xiaowei; Liu, Bo; Shi, Yuan; Lu, Ying; Wen, Lianfang; Li, Yan; Li, Zhisheng; Men, Yongfeng; Feng, Xuequan; Liu, Wenguang

Customer publications

Radiopaque Highly Stiff and Tough Shape Memory Hydrogel Microcoils for Permanent Embolization of Arteries

Zhang, Yinyu; Gao, Haijun; Wang, Hao; Xu, Ziyang; Chen, Xiaowei; Liu, Bo; Shi, Yuan; Lu, Ying; Wen, Lianfang; Li, Yan; Li, Zhisheng; Men, Yongfeng; Feng, Xuequan; Liu, Wenguang

Transcatheter arterial embolization of aneurysm with metal microcoils is notoriously prone to recanalization arising from the low filling ratio due to their extreme rigidity. Smart hydrogel microcoils with tunable modulus may essentially significantly improve the therapeutic efficacy. Here, a radiopaque highly stiff body-temperature-triggered shape memory (SM) hydrogel is fabricated for…
Precursor non-stoichiometry to enable improved CH3NH3PbBr3 nanocrystal LED performance

Chandran, Bevita K.; Veldhuis, Sjoerd A.; Chin, Xin Yu; Bruno, Annalisa; Yantara, Natalia; Chen, Xiaodong; Mhaisalkar, Subodh

ApplicationCharacterizationCustomer publicationsInorganic materialsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Precursor non-stoichiometry to enable improved CH3NH3PbBr3 nanocrystal LED performance

Chandran, Bevita K.; Veldhuis, Sjoerd A.; Chin, Xin Yu; Bruno, Annalisa; Yantara, Natalia; Chen, Xiaodong; Mhaisalkar, Subodh

High photoluminescence quantum yields and narrow emission wavelengths, combined with low temperature solution processing, make CH3NH3PbBr3 nanocrystals (NCs) favorable candidates for light-emitting applications. Herein, we describe the synthesis of CH3NH3PbBr3 NC inks by a convenient room-temperature ligand assisted reprecipitation protocol. We further investigate the effect of modulation of the…
Precise inter-lamellar/inter-fibrillar localization and consequent fabrication of porous membranes with crystallization-modulated pore-size

Ye, Cuicui; Zhao, Jinxing; Ye, Lijun; Jiang, Zhiyong; You, Jichun; Li, Yongjin

Customer publications

Precise inter-lamellar/inter-fibrillar localization and consequent fabrication of porous membranes with crystallization-modulated pore-size

Ye, Cuicui; Zhao, Jinxing; Ye, Lijun; Jiang, Zhiyong; You, Jichun; Li, Yongjin

In poly(vinylidene fluoride)/poly(1,4-butylene succinate) (i.e. PVDF/PBSU) blend, the precise inter-lamellar or inter-fibrillar localization of PVDF crystal lamellae has been achieved. In the specimen with PVDF 70 wt%, comparable PVDF and PBSU volume fractions result in the inter-lamellar structures. When PVDF acts as the minority phase (PVDF 30 wt%), its crystal lamellae locate…
Polysaccharide and poly(methacrylic acid) based biodegradable elastomeric biocompatible semi-IPN hydrogel for controlled drug delivery

Ganguly, Sayan; Maity, Priti Prasanna; Mondal, Subhadip; Das, Poushali; Bhawal, Poushali; Dhara, Santanu; Das, Narayan Ch.

Customer publications

Polysaccharide and poly(methacrylic acid) based biodegradable elastomeric biocompatible semi-IPN hydrogel for controlled drug delivery

Ganguly, Sayan; Maity, Priti Prasanna; Mondal, Subhadip; Das, Poushali; Bhawal, Poushali; Dhara, Santanu; Das, Narayan Ch.

Nanoparticles embedded semi-interpenetrating (semi-IPNs) polymeric hydrogels with enhanced mechanical toughness and biocompatibility could have splendid biomedical acceptance. Here we propose poly(methacrylic acid) grafted polysaccharide based semi-IPNs filled with nanoclay via in situ Michael type reaction associated with covalent crosslinking with N,N-methylenebisacrylamide (MBA). The effect of…
Polyurethane with an ionic liquid crosslinker: a new class of super shape memory-like polymers

Behera, Prasanta Kumar; Mondal, Prantik; Singha, Nikhil K.

Customer publications

Polyurethane with an ionic liquid crosslinker: a new class of super shape memory-like polymers

Behera, Prasanta Kumar; Mondal, Prantik; Singha, Nikhil K.

This investigation reports on the synthesis of a new class of ionic liquid crosslinked shape-memory polyurethane (PU-IL) based on polycaprolactone diol and 4,4′-methylenebis(phenyl isocyanate) (MDI), which can overcome the major drawbacks of conventional shape-memory polyurethanes. In this case, the ionic liquid crosslinker in PU-IL exhibited not only a higher shape-recovery…
Poly(neopentyl glycol 2,5-furandicarboxylate): A Promising Hard Segment for the Development of Bio-based Thermoplastic Poly(ether-ester) Elastomer with High Performance

Chi, Dequan; Liu, Fei; Na, Haining; Chen, Jing; Hao, Chuncheng; Zhu, Jin

Customer publications

Poly(neopentyl glycol 2,5-furandicarboxylate): A Promising Hard Segment for the Development of Bio-based Thermoplastic Poly(ether-ester) Elastomer with High Performance

Chi, Dequan; Liu, Fei; Na, Haining; Chen, Jing; Hao, Chuncheng; Zhu, Jin

With a high melting temperature and good crystallization ability, poly(neopentyl glycol 2,5-furandicarboxylate) (PNF), a polyester derived from bio-based 2,5-furandicarboxylic acid and neopentyl glycol, has been proposed and proved to be a promising hard segment for the development of novel bio-based thermoplastic poly(ether-ester) elastomer (TPEE). The resulting TPEE, namely PNF–PTMG, has…
Poly(ether ether ketone) grafted with sulfoalkylamine for highly sensitive humidity sensor with small hysteresis

Shao, Zhi; Zhuang, Zhuang; Lin, Haidan; Zhao, Chengji

Customer publications

Poly(ether ether ketone) grafted with sulfoalkylamine for highly sensitive humidity sensor with small hysteresis

Shao, Zhi; Zhuang, Zhuang; Lin, Haidan; Zhao, Chengji

Here, a series of novel poly(ether ether ketone) containing sulfoalkylamine pendant groups (SNPEEK-x) were synthesized by grafting copolymerization reaction. The chemical structure of SNPEEK-x was identified by 1H NMR and the morphology of all films was measured by SAXS and TEM. The impedance varied for five orders of magnitude (from…
Photo-responsive liquid crystals derived from azobenzene centered cholesterol-based tetramers

Gupta, Monika; Pal, Vaibhav; Pal, Santanu Kumar

Customer publications

Photo-responsive liquid crystals derived from azobenzene centered cholesterol-based tetramers

Gupta, Monika; Pal, Vaibhav; Pal, Santanu Kumar

This paper demonstrates the design and synthesis of azobenzene centred cholesterol based tetramers. A series of eight oligomeric compounds with varying flexible alkyl spacers (n = 1–8) is reported. These compounds displayed enantiotropic and monotropic chiral nematic (N*) mesophases, which were characterized by polarized optical microscopy (POM), differential scanning calorimetry…