Category

Polymer research

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSTechniqueTemperature

Tuning Mechanical Properties of Biobased Polymers by Supramolecular Chain Entanglement

Lamm, Meghan E.; Song, Lingzhi; Wang, Zhongkai; Rahman, Md Anisur; Lamm, Benjamin; Fu, Lin; Tang, Chuanbing

A variety of biobased polymers have been derived from diverse natural resources. However, the mechanical properties of some of these polymers are inferior due to low chain entanglement. We report a facile strategy termed “supramolecular chain entanglement”, which utilizes supramolecular interactions to create physical cross-linking and entanglements for polymers with…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsMaterialOtherPolymer researchSAXSTechnique

Tunable Fluorophobic Effect Determines Nanoparticle Dispersion in Homopolymers and Block Polymers

Marsh, Zachary M.; Blom, Douglas A.; Stefik, Morgan

The controlled placement of nanoparticles (NPs) within homopolymers and block polymers is of broad interest for functional nanomaterials. This manuscript focuses on small molecule-stabilized NPs that bring a large fraction of functionality. For such NP mixtures with block polymers, the overwhelming focus to date has been the use of attractive…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Comparative Study of Direct Compounding, Coupling Agent-Aided and Initiator-Aided Reactive Extrusion to Prepare Cellulose Nanocrystal/PHBV (CNC/PHBV) Nanocomposite

Zheng, Ting; Clemons, Craig M.; Pilla, Srikanth

Three compounding methods were compared to determine their effects on the organization of the interphase in nanocomposites of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and cellulose nanocrystals (CNCs) processed via (1) direct compounding, (2) reactive extrusion using a coupling agent (PHBV-g-GMA), or (3) reactive extrusion using a peroxide free-radical initiator (dicumyl peroxide,…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSTechnique

Fast Photochromic Dye Response in Rigid Block Polymer Thermosets

Peterson, Colin; Hillmyer, Marc A.

The behavior of photochromic spiropyran (SP) dyes is greatly affected by the local environment in which they reside. Fluid microenvironments such as liquidlike polymers grant favorably fast dye decoloration whereas rigid microenvironments such as glassy polymers inhibit fast dye response. We study the use of disorganized but microphase-separated block polymer…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialPolymer researchTechniqueWAXS

Improving the Hydrolysis Rate of the Renewable Poly(hexamethylene sebacate) Through Copolymerization of a Bis(pyrrolidone)-Based Dicarboxylic Acid

Noordzij, Geert J.; Roy, Manta; Bos, Natasja; Reinartz, Vincent; Wilsens, Carolus H. R. M.

In this work, we report on the synthesis of a series of polyesters based on 1,6-hexanediol, sebacic acid, and N,N’-dimethylene-bis(pyrrolidone-4-carboxylic acid) (BP-C2), of which the latter is derived from renewable itaconic acid and 1,2-ethanediamine. Copolymers with a varying amount of BP-C2 as dicarboxylic acid are synthesized using a melt-polycondensation reaction…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialOrientation analysisPolymer researchTechniqueWAXS

Tailored crystalline order of nascent polyethylene from metallocene supported on confined polystyrene

Wu, Yanjie; Yang, Huaqin; Li, Wei; Mattea, Carlos; Stapf, Siegfried; Zhang, Letian; Ye, Chunlin; Ye, Xiaofeng

Building the desirable superstructure of polyethylene is one of the important topics for developing high value-added products, which brings potential benefits for society and sustainable development. Crystalline order is the ubiquitous superstructure for enhancing mechanical properties of polymeric materials. In this work, polystyrene copolymers (c-PS) are incorporated into pores of…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSSelf-assembled materialTechnique

Fragmentation of 1,2-Polybutadiene-block-Poly(ethylene oxide) Micelles in Imidazolium-Based Ionic Liquids

Early, Julia T.; Lodge, Timothy P.

The effect of solvent selectivity on the fragmentation kinetics of spherical micelles formed by a 1,2-polybutadiene-block-poly(ethylene oxide) “BO” copolymer in five 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide-based ionic liquids (ILs), (, where n = methyl, ethyl, butyl, hexyl, and octyl) was investigated by temperature-jump dynamic light scattering (T-jump DLS),…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Structure Evolution and Deformation Behavior of Polyethylene Film during Biaxial Stretching

Chen, Qiang; Wang, Zhiwei; Zhang, Sumei; Cao, Ya; Chen, Jinyao

The structure evolution and deformation behavior of tenter-frame biaxially oriented polyethylene (TF-BOPE) films were investigated in this study. For sequential biaxial stretching, the original spherulites were broken into small pieces, and the fibrillar structure simultaneously formed during the machine direction (MD) stretching. Subsequently, the single fibrils were pulled away, and…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisPolymer researchSAXSTechnique

Tubular Sensor with Multi-Axial Strain Sensibility and Heating Capability Based on Bio-Mimic Helical Networks

Li, Yijun; Zhang, Kailin; Nie, Min; Wang, Qi

Sensors are crucial in industrial robotics and smart production line owing to the basic needs for human–machine communication and real-time monitoring. However, a lack of versatile sensing capability and multifunctionalities are still two urgent bottlenecks for current sensors to break through. In this study, from the biomimic perspective, helical and…
sergio.rodrigues@xenocs.com
27 January 2020
(Natural) polymersApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisOtherPolymer researchSAXSTechnique

Microstructure and properties of polyacrylonitrile based carbon fibers

Lu, Junshan; Li, Weiwei; Kang, Hongliang; Feng, Libang; Xu, Jian; Liu, Ruigang

The microstructure of polyacrylonitrile (PAN)-based carbon fibers with different mechanical properties was investigated. It was found that the tensile strength of the PAN-based carbon fibers generally decrease with the increase in the modulus. The properties of PAN-based carbon fiber are mainly controlled by the microstructure and microvoids. The increase in…
sergio.rodrigues@xenocs.com
27 January 2020