Category

Polymer research

(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionMaterialPolymer researchSAXSTechnique

A highly transparent and ultra-stretchable conductor with stable conductivity during large deformation

Lei, Zhouyue; Wu, Peiyi

Intrinsically stretchable conductors have undergone rapid development in the past few years and a variety of strategies have been established to improve their electro-mechanical properties. However, ranging from electronically to ionically conductive materials, they are usually vulnerable either to large deformation or at high/low temperatures, mainly due to the fact…
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchTechniqueWAXS

Diversified α-phase nanostructure of isotactic polypropylene under cylindrical confinement via cross diffraction analysis

Zeng, Xingming; Zhang, Shuailin; Zheng, Nan; Yu, Shichen; Li, Xiaoguang; Ageishi, Masaki; Lotz, Bernard; Liu, Gengxin; Cao, Yan

Understanding polymer nanostructures is a prerequisite to manipulate their physical properties. Molecular self-assembly under confinement effectively generates novel polymer nanostructures. However, in one confined system, diffraction signals of different nanostructures are merged in a typical two-dimensional (2D) wide-angle X-ray diffraction (WAXD) measurement. For comparison, selected-area…
(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

High-performance polyurethane nanocomposites based on UPy-modified cellulose nanocrystals

Tian, Donglin; Wang, Fenfen; Yang, Zhijun; Niu, Xiling; Wu, Qiang; Sun, Pingchuan

Densely H-bonding assemblies are the key strategy found by nature to enhance the rupture strength of natural polymers without sacrificing their toughness, such as spider silk, while it still remains a great challenge using such intriguing strategy to prepare high-performance synthesized polymer or biopolymer enhanced polymer nanocomposites. To address this…
(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialOrientation analysisPhase analysisPolymer researchSAXSTechnique

Structure and self-reinforcing mechanism of biaxially oriented polyethylene pipes produced by solid phase die drawing

Kong, Chen; Wang, Yujie; Ye, Lin; Zhao, Xiaowen

Biaxially oriented polyethylene (PE) pipes were prepared through solid phase die drawing technology. Drawing speed presented a prominent effect on the hoop draw ratio (DRhoop) and axial draw ratio (DRaxial) of the pipes. For pipe with DRhoop/DRaxial of 2.465/1.182, the tensile strength was improved significantly along hoop direction as well…
(Hydro)gels(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchTechniqueWAXS

Controlling the Supramolecular Polymerization of Donor-Acceptor π-Systems through Hydrogen Bond Intervention

Nair, Vishnu Sukumaran; Vedhanarayanan, Balaraman; Ajayaghosh, Ayyappanpillai

Supramolecular polymerization of donor-acceptor type molecules leads to mixed or self-sorted assemblies depending on the donor-acceptor strength and extent of noncovalent interactions between the components. Herein, we discuss how competing hydrogen bonding motifs control the supramolecular polymerization pathway of a two-component molecular π-system of oligo(p-phenylenevinylene) (OPV-B and…
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsFractal dimensionMaterialPolymer researchSAXSTechniqueTemperature

Ordered structure effects on β-nucleated isotactic polypropylene/graphene oxide composites with different thermal histories

Yu, Yansong; Xu, Ruizhang; Chen, Jinyao; Kang, Jian; Xiang, Ming; Li, Yuanjie; Li, Lu; Sheng, Xingyue

In this paper, the influence of ordered structure effects (OSE) on crystallization behaviors of b-nucleated isotactic polypropylene/graphene oxide (b-iPP/GO) composites with different thermal histories, which crystallized at a slow cooling rate (called SLOW), fast cooling rate (called FAST) and medium cooling rate (called MED), respectively, was studied by differential scanning…
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialPolymer researchSAXSTechnique

Influence of extender oil composition on flowing property, thermal stability, and morphology of styrene-b-ethylene-co-butylene-b-styrene copolymer/polypropylene/oil blends

Shi, Xiaotao; Wu, Jianxun; Zhen, Xinping; Xie, Haisheng; Xiong, Chunzhu

In this study, a series of styrene-b-ethylene-co-butylene-b-styrene copolymer (SEBS)/polypropylene (PP)/oil blends with different kinds of oil composition was developed through melt blending. The effect of oil with different composition and properties on its phase equilibrium and “redistribution” in multiphasic SEBS elastomer was systematically studied for the first time. Moreover, an…
(Natural) polymersApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisPolymer researchTechniqueWAXS

Effect of Drawing on the Electrical, Thermoelectrical, and Mechanical Properties of Wet-Spun PEDOT:PSS Fibers

Sarabia-Riquelme, Ruben; Shahi, Maryam; Brill, Joseph W.; Weisenberger, Matthew C.

New electrically conducting and mechanically robust fibers and yarns are needed as building blocks for emerging textile devices. In this work, we describe a continuous wet-spinning process for the fabrication of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) fibers with high electrical conductivity, excellent mechanical properties, and moderate thermoelectric performance by…
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsFractal dimensionMaterialPolymer researchSAXSTechniqueWAXS

Dielectric and flash DSC investigations on an epoxy based nanocomposite system with MgAl layered double hydroxide as nanofiller

Szymoniak, Paulina; Li, Zhi; Wang, De-Yi; Schönhals, Andreas

Nanocomposites based on MgAL layered double hydroxides (LDH) and an epoxy resin were prepared and investigated by a combination of complementary methods. As epoxy resin Bisphenol A diglycidyl ether (DGEBA) was used with Diethylenetriamine as curing agent. The LDH was modified with taurine, which acts as an additional crosslinking agent…
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialPolymer researchSAXSSizeTechnique

Fabrication and investigation of 3D tuned PEG/PEDOT: PSS treated conductive and durable cotton fabric for superior electrical conductivity and flexible electromagnetic interference shielding

Ghosh, Sabyasachi; Ganguly, Sayan; Remanan, Sanjay; Das, Narayan Ch

Promotions of conducting e-textiles are drawing attention for mitigating electromagnetic radiation pollution. Probably it is a huge challenge to gain long-term durable and stable fabric for all-weather outdoor application. In this work, a facile dip coating design has been adopted to fabricate PEG/PEDOT: PSS treated fabric. The high electrical conductivity…