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Polymer research

Preparation, Structure, and Properties of an Isotactic Polypropylene Film with Ultrahigh Content, Ordered, and Continuous ?-Transcrystallinity

Liang, Guixue; Yang, Shuo; Li, Jiang; Guo, Shaoyun

(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechniqueTensile

Preparation, Structure, and Properties of an Isotactic Polypropylene Film with Ultrahigh Content, Ordered, and Continuous ?-Transcrystallinity

Liang, Guixue; Yang, Shuo; Li, Jiang; Guo, Shaoyun

?-Transcrystallinity (?-TC) of polypropylene (PP) is a novel kind of crystal that is of significant importance. Owing to the low content, discontinuity, and random distribution of ?-TC obtained by traditional methods, there has not been significant research on this particular crystal. Thus, its formation mechanism and growth law remain unclear…
Moebius strips of chiral block copolymers

Geng, Zhen; Xiong, Bijin; Wang, Liquan; Wang, Ke; Ren, Min; Zhang, Lianbin; Zhu, Jintao; Yang, Zhenzhong

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSelf-assembled materialTechniqueWAXS

Moebius strips of chiral block copolymers

Geng, Zhen; Xiong, Bijin; Wang, Liquan; Wang, Ke; Ren, Min; Zhang, Lianbin; Zhu, Jintao; Yang, Zhenzhong

The Moebius topology (twisted, single-sided strip) is intriguing because of its structural elegance and distinct properties. Here we report the generation of block copolymer Moebius strips via a fast self-assembly of chiral block copolymer polystyrene-block-poly(D-lactide acid) (PS-b-PDLA) in tetrahydrofuran/water mixed solvents. The Moebius strip is formed by morphological evolution from…
Transition Pathway between Gyroid and Cylindrical Morphology in Linear Triblock Terpolymer Thin Films

Guliyeva, Aynur; Vayer, Marylène; Warmont, Fabienne; Takano, Atsushi; Matsushita, Yushu; Sinturel, Christophe

(Natural) polymersApplicationCharacterizationCustomer publicationsGISAXSMaterialPhase analysisPolymer researchSelf-assembled materialSurface structure and patternsTechnique

Transition Pathway between Gyroid and Cylindrical Morphology in Linear Triblock Terpolymer Thin Films

Guliyeva, Aynur; Vayer, Marylène; Warmont, Fabienne; Takano, Atsushi; Matsushita, Yushu; Sinturel, Christophe

A new transition between alternating gyroid (GA) structure and cylindrical morphology was observed in thin films for a poly(isoprene-block-styrene-block-(2-vinylpyridine)) (ISP) triblock terpolymer (I/S/P volume fraction = 0.20:0.66:0.14) exhibiting in bulk a Q214 (space group I4132) morphology. Thin films were organized using solvent vapor annealing (SVA) and characterized by atomic force…
High-Performance Lignin-Containing Polyurethane Elastomers with Dynamic Covalent Polymer Networks

Liu, Weifeng; Fang, Chang; Wang, Shengyu; Huang, Jinhao; Qiu, Xueqing

(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialPolymer researchSAXSTechnique

High-Performance Lignin-Containing Polyurethane Elastomers with Dynamic Covalent Polymer Networks

Liu, Weifeng; Fang, Chang; Wang, Shengyu; Huang, Jinhao; Qiu, Xueqing

High-performance lignin-containing polyurethane elastomers (LPUes) were successfully synthesized via partially substituting petroleum-derived polyols with depolymerized enzymatic hydrolysis lignin (DEL). The influences of DEL on the structure, thermostability, mechanical performance, and thermal reprocessability of LPUes were systematically studied. The tensile strength and toughness of PUes were…
High-Performance Organic Electrochemical Transistors Based on Conjugated Polyelectrolyte Copolymers

Schmode, Philip; Ohayon, David; Reichstein, Paul M.; Savva, Achilleas; Inal, Sahika; Thelakkat, Mukundan

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSTechnique

High-Performance Organic Electrochemical Transistors Based on Conjugated Polyelectrolyte Copolymers

Schmode, Philip; Ohayon, David; Reichstein, Paul M.; Savva, Achilleas; Inal, Sahika; Thelakkat, Mukundan

A new generation of polythiophene-based polyelectrolytes is reported to address fundamental issues in organic electrochemical transistors (OECTs). In such devices, the semiconductor must be able to transport and store ions and possess simultaneously a very high electronic mobility. For this, the ion-conducting 6-(thiophen-3-yl) hexane-1-sulfonate tetramethylammonium monomer (THS–TMA+) is