Semi‐interpenetrating polymer networks based on polyurethane ionomer/poly(vinyl chloride)

Jaisankar, Sellamuthu N.; Lakshminarayana, Y.; Radhakrishnan, Ganga

doi:10.1002/adv.10065

Cited by 12 publications

(4 citation statements)

References 15 publications

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“…5 TPU is one of the most versatile materials with high wear resistance and excellent tailor made properties, 6 because of their excellent mechanical properties, light weight and cost effectiveness. 7 Generally, polyurethane (PU) consists of a soft segment with high-molecular-weight polyester or polyether polyol and the hard segment, which is the combination of diisocyanate and low-molecular-weight diol or diamine. 8 The introduction of inorganic fillers, such as nanoclay, carbon black, and so on, into the PU matrix improves the mechanical and thermal properties of PU.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic polyurethane/single-walled carbon nanotube composites with low electrical resistance surfaces

Sankar

Meera

Mandal

et al. 2012

High Performance Polymers

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Thermoplastic polyurethane (TPU)/single-walled carbon nanotube (SWCNT) nanocomposite films were prepared using 1,6-hexane diisocyanate and hydroxyl-terminated polybutadiene (HTPB) in tetrahydrofuran with various concentrations of SWCNTs. The interaction between polyurethane (PU) and SWCNTs in nanocomposite was studied using different methods. The film turns yellowish to grayish-black in colour upon increasing the concentration of SWCNTs in PU matrix. This may be due to the formation of p-p interaction between polyurethane amide functional group and SWCNTs. Differential scanning calorimetric results show that the soft segment of nanocomposite interacts much stronger than hard segment, which results in lowering melting transition temperature of soft segments. The activation energy and thermal stability parameters were determined from thermogravimetric and differential scanning calorimetric analyses. The x-ray photoelectron spectroscopic results show the intermolecular interaction between HTPB-based PU and SWCNT. Mesoporous morphology of the nanocomposites was observed by scanning electron microscopy. The average diameter of the pores was calculated using Gaussian method. The TPU films exhibit about 3.5 times greater resistivity than nanocomposite films. All the analysed data prove that the SWCNTs were well distributed in PU matrix and exhibited as tough films with low electrical resistivity.

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Section: Introductionmentioning

confidence: 99%

Thermoplastic polyurethane/single-walled carbon nanotube composites with low electrical resistance surfaces

Sankar

Meera

Mandal

et al. 2012

High Performance Polymers

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“…Hydrophobicity depends on the surface energy, chemical composition, and topology of the materials. SEM images (Figure 5b (images E and F)) confirmed the interpenetrating network (IPN), i.e., polymer (PU) diffused between the adjacent fibers and coated 27 . It also alludes to no distinct phase separation, attributed to the good compatibility between PU, LW, and PGMA.…”

Section: Resultsmentioning

confidence: 75%

“…SEM images (Figure 5b (images E and F)) confirmed the interpenetrating network (IPN), i.e., polymer (PU) diffused between the adjacent fibers and coated. 27 It also alludes to no distinct phase separation, attributed to the good compatibility between PU, LW, and PGMA. However, the surface roughness and pores were observed in the PLG composite (Figure 5b (image F)) with incorporation of LW and PGMA.…”

Section: Shape Memory Performances Of Pl and Plg In Air And Watermentioning

confidence: 99%

Harnessing leather waste in polymer matrix for sustainable smart shape‐stable phase change materials

Sarkar,

Samanta,

Chaudhuri

et al. 2024

J of Applied Polymer Sci

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The utilization of leather waste (LW) in a polyurethane (PU) matrix makes a smart and novel shape stable phase change material (SSPCM). This is essential for sustainability as it reduces landfill waste after use. The PU is synthesized in bulk with a 90% yield, using biodegradable polycaprolactone diol and bio‐based polyol (castor oil), along with tolylene‐2,4‐diisocyanate. PL and PLG composites are prepared by blending of constituent components PU (P), LW (L), and poly(glycidyl methacrylate) (PGMA, G), as specified by their code names. Role of LW (hydrogen bonding and chemical crosslinking) and morphology are elucidated by FTIR and SEM, respectively. Self‐healing time (2 h), shape fixity ratios (Rf) (PL: 60–80% and PLG: 60–70%) and shape recovery ratios (Rr) (100% for both) are determined at 60°C. PLG displays faster shape recovery in water (<30 s) compared to air (>300 s). Shape stability and thermal properties of the SSPCM are examined using the temperature responsive leakage study, TGA, and DSC. This research introduces a new approach for using leather waste (LW) in SSPCM, with self‐healing and 100% Rr. This material may find application where SSPCM with high durability and flexibility is essential such as textile and footwear materials.

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“…For polyurethane anionomers, early practice contemplated the use of chain‐extenders with acid side‐chain functionalities of high dissociation constant, as sulphuric 11 or phosphoric 12 acid. Chain‐extender selection also included carboxylic acid functionalities, 13,14 aiming to dampen the unfavorable effect of acid proton dissociation on the urethane polymerization kinetics. Alternative routes of synthesis revolved around post‐functionalization of otherwise non‐ionic polyurethanes 15–17 …”

Section: Introductionmentioning

confidence: 99%

Self‐healing behavior in blends of PDMS‐based polyurethane ionomers

Via

Suriano

Boumezgane

et al. 2021

Polymers for Advanced Techs

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Ionic interactions offer the highest non-covalent cohesive strength in supramolecular assemblies. In spite of that, they have been consistently underestimated in the development of self-healing materials due to their lack of directionality and association specificity. In this paper, ionic moieties are introduced as side-chain pendants in poly(urea-urethane) siloxane-based polymers, aiming to obtain a strong yet flexible elastomer with the capability to recover from a damaged state. The synthesis was carried out by a two-step polymerization involving polydimethylsiloxane (PDMS) diamine-terminated, isophorone diisocyanate (IPDI) and a chain extender providing the required ionic functionality. Internal phase separation allowed the material to show its elastomeric behavior. After preparation of the blend by mechanical mixing, the formation of ionic interactions was checked for by FT-IR spectroscopy, rheological analysis and tensile tests. Healing of notch damage was evaluated both with respect to tensile strength and fracture toughness. At room temperature (21 C) and humidity (30% RH) the maximum recovery measured at 14 days was 47%. Selfhealing dependence on humidity and temperature was assessed, resulting in further improvements (up to 100%) as molecular mobility was increased by both conditions.

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Semi‐interpenetrating polymer networks based on polyurethane ionomer/poly(vinyl chloride)

Cited by 12 publications

References 15 publications

Thermoplastic polyurethane/single-walled carbon nanotube composites with low electrical resistance surfaces

Thermoplastic polyurethane/single-walled carbon nanotube composites with low electrical resistance surfaces

Harnessing leather waste in polymer matrix for sustainable smart shape‐stable phase change materials

Self‐healing behavior in blends of PDMS‐based polyurethane ionomers

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