Influence of Incorporated Polydimethylsiloxane on Properties of PA66 Fiber and Its Fabric Performance

Poly(hexamethyllene adipamide), PA66 fiber has played an important role in varied industrial applications, and its corresponding product would become more competitive if some extra value was added to PA66 fiber. In this article, polydimethylsiloxane (PDMS) was used as an additive to prepare PA66/PDMS blend fibers through melt blend spinning carried out by a screw extruder spinning machine. When the amount of incorporated PDMS was 0.5–3 wt %, the blend melt demonstrated good spinning ability, and the PA66/PDMS blend fibers exhibited excellent mechanical property and reduced hot shrinkage. Moreover, the crystallization and melting behavior of PA66 in the blend fibers turned out to be not affected by the existence of PDMS. In addition, the contact angle of water on the blend fiber surface became larger, while the value of friction coefficient on the surface of fibers got lower with increasing PDMS content in the blend fibers. After evaluating the fabric woven by PA66/PDMS blend fibers using the KES-F KES-FB-2 fabric measuring system, it was found that as PDMS content increased, the flexural rigidity and bending hysteresis would be lower, yet elasticity rate of compression work would be higher, which explained how the fabric composed of the blend fiber performed better in terms of softness and elasticity.

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Crystallization Behavior of Polypropylene (PP)/ Polyethylene Terephthalate (PET) Composite Fibres

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.833 ◽

2008 ◽

Vol 47-50 ◽

pp. 833-836

Author(s):

Dong Hui Liu ◽

Xiao Juan Si ◽

Jin Gao ◽

Ling Ling Cao ◽

Yi Min Wang

Keyword(s):

Polyethylene Terephthalate ◽

Differential Scanning Calorimeter ◽

Crystallization Temperature ◽

Crystallization Behavior ◽

Nucleating Agent ◽

Melting Behavior ◽

Screw Extruder ◽

Crystallization Peak ◽

Twin Screw ◽

Crystallization And Melting Behavior

Polypropylene (PP)/ polyethylene terephthalate (PET) composite fibres modified by PP-g-AA as a compatilizer were prepared by melt extrusion in a twin screw extruder. The crystallization and melting behavior of PP fibre and PP/PET composite fibres were investigated with differential scanning calorimeter (DSC)[1]. The results indicate that addition of PET acts as nucleating agent on the PP/PET composite fibres and increases the crystallization temperature of PP. [2,3]The crystallization peak temperature (Tp) increased first and decreased afterwards with the increase of PET, indicating that small amount of PET would promote the crystallization of PP, but excessive would reduce the crystallinity.

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Effects of a Twin-Screw Extruder Equipped with a Molten Resin Reservoir on the Mechanical Properties and Microstructure of Recycled Waste Plastic Polyethylene Pellet Moldings

Polymers ◽

10.3390/polym13071058 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1058

Author(s):

Hikaru Okubo ◽

Haruka Kaneyasu ◽

Tetsuya Kimura ◽

Patchiya Phanthong ◽

Shigeru Yao

Keyword(s):

Mechanical Properties ◽

Mechanical Performance ◽

Value Added ◽

Industrial Applications ◽

Twin Screw Extruder ◽

Screw Extruder ◽

Polymer Properties ◽

Wide Range ◽

Twin Screw ◽

Recycled Plastics

Each year, increasing amounts of plastic waste are generated, causing environmental pollution and resource loss. Recycling is a solution, but recycled plastics often have inferior mechanical properties to virgin plastics. However, studies have shown that holding polymers in the melt state before extrusion can restore the mechanical properties; thus, we propose a twin-screw extruder with a molten resin reservoir (MSR), a cavity between the screw zone and twin-screw extruder discharge, which retains molten polymer after mixing in the twin-screw zone, thus influencing the polymer properties. Re-extruded recycled polyethylene (RPE) pellets were produced, and the tensile properties and microstructure of virgin polyethylene (PE), unextruded RPE, and re-extruded RPE moldings prepared with and without the MSR were evaluated. Crucially, the elongation at break of the MSR-extruded RPE molding was seven times higher than that of the original RPE molding, and the Young’s modulus of the MSR-extruded RPE molding was comparable to that of the virgin PE molding. Both the MSR-extruded RPE and virgin PE moldings contained similar striped lamellae. Thus, MSR re-extrusion improved the mechanical performance of recycled polymers by optimizing the microstructure. The use of MSRs will facilitate the reuse of waste plastics as value-added materials having a wide range of industrial applications.

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Engineering flexible carbon nanofibers concatenated MOFs-derived hollow octahedral CoFe2O4 as anode materials for enhanced lithium storage

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00414j ◽

2021 ◽

Author(s):

Fangfang Xue ◽

Yangyang Li ◽

Chen Liu ◽

Zhigang Zhang ◽

Jun Lin ◽

...

Keyword(s):

Mechanical Property ◽

Anode Materials ◽

Electrode Materials ◽

Electronic Devices ◽

High Capacity ◽

Lithium Ion ◽

Lithium Storage ◽

Excellent Mechanical Property ◽

Wearable Electronic ◽

Wearable Electronic Devices

Constructing suitable electrode materials with high capacity and excellent mechanical property is indispensable for flexible lithium-ion batteries (LIBs) to satisfy the growing flexible and wearable electronic devices. Herein, a necklace-like...

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Crystallization and melting behavior of silica nanoparticles and poly(ethylene 2,6-naphthalate) hybrid nanocomposites

Macromolecular Research ◽

10.1007/bf03218502 ◽

2006 ◽

Vol 14 (2) ◽

pp. 146-154 ◽

Cited By ~ 20

Author(s):

Jun Young Kim ◽

Seong Hun Kim ◽

Seong Wook Kang ◽

Jin-Hae Chang ◽

Seon Hoon Ahn

Keyword(s):

Silica Nanoparticles ◽

Melting Behavior ◽

Hybrid Nanocomposites ◽

Poly Ethylene ◽

Crystallization And Melting Behavior

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Crystallization and melting behavior of polyester/clay nanocomposites

Polymer International ◽

10.1002/pi.1513 ◽

2004 ◽

Vol 53 (9) ◽

pp. 1282-1289 ◽

Cited By ~ 54

Author(s):

In Yee Phang ◽

KP Pramoda ◽

Tianxi Liu ◽

Chaobin He

Keyword(s):

Melting Behavior ◽

Clay Nanocomposites ◽

Crystallization And Melting Behavior

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Crystallization and melting behavior of poly(ethylene oxide)/poly(n-butyl methacrylate) blends

European Polymer Journal ◽

10.1016/s0014-3057(02)00018-6 ◽

2002 ◽

Vol 38 (7) ◽

pp. 1327-1335 ◽

Cited By ~ 13

Author(s):

E.El. Shafee ◽

W. Ueda

Keyword(s):

Ethylene Oxide ◽

Melting Behavior ◽

Butyl Methacrylate ◽

Poly Ethylene Oxide ◽

Poly Ethylene ◽

Crystallization And Melting Behavior

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Controllable synthesis of boron nitride submicron tubes and their excellent mechanical property and thermal conductivity applied in the epoxy resin polymer composites

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2021.106783 ◽

2021 ◽

pp. 106783

Author(s):

Wenzhuo Chen ◽

Yuanlie Yu ◽

Gu Yuanping ◽

Yuchun Ji ◽

Junjie He ◽

...

Keyword(s):

Thermal Conductivity ◽

Mechanical Property ◽

Boron Nitride ◽

Epoxy Resin ◽

Polymer Composites ◽

Controllable Synthesis ◽

Excellent Mechanical Property

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Electroless plating process for the manufacture of radiation protection suits for pregnant woman: Effect of bending on its electromagnetic shielding performance

Journal of Industrial Textiles ◽

10.1177/15280837211068205 ◽

2022 ◽

pp. 152808372110682

Author(s):

Chengmei Gui ◽

Di Sun ◽

Wenya Liu ◽

Haodong Ma ◽

Zhenming Chen ◽

...

Keyword(s):

Pregnant Woman ◽

Radiation Protection ◽

Noble Metals ◽

Low Cost ◽

Fiber Surface ◽

Electroless Nickel ◽

Electromagnetic Shielding ◽

Shielding Effectiveness ◽

Blend Fiber ◽

Negative Effect

Multi-ion fabrics (especially silver ion fabrics) have special advantages as electromagnetic radiation, but the use of noble metals enhances its cost. Electroless nickel plating (EP-Ni) has great potential application in fabricating low-cost metallized material. Here, EP-Ni on pure cotton surface to fabricate radiation protection suits for pregnant woman was established to replace traditional protection suits with silver film. The active groups on the cotton/polyester blend fiber surface could absorb tin and palladium ions, acting as catalytic centers, which can catalyze the reduction of Ni2+ in the plating solution. Ni particle with (111) crystal plane preferential oriented crystal structure deposited on cotton surface with a coarse microstructure. The Ni deposited amount is about 19%. The fabricated material exhibited a shielding effectiveness of 29.5 dB. Studies also shown that bending has no negative effect on crystallinity and electrical property. But more bending times could lead to crack, which would decline electromagnetic shielding performance by 24%.

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