Investigation of non-adhesive behaviour of waterborne polyurethane dispersions

Akram, Nadia; Zia, Khalid Mahmood; Saeed, Muhammad; Usman, Muhammad; Khan, Waheed Gul; Bashir, Muhammad Arshad

doi:10.1007/s10965-019-1707-7

Cited by 11 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A detailed description of synthesis of waterborne PSA's has been reported in our previous work . The precisely calculated quantities of macrodiols (PPG and HTPB) and diisocyanate (IPDI) were reacted in the first step.…”

Section: Methodsmentioning

confidence: 99%

Compositional effect on the deformation behavior of polyurethane pressure‐sensitive adhesive thin films

Akram

Zia

Saeed

et al. 2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

The careful selection of composition for thin films is a critical issue to deal with. A mere change in stoichiometry deforms the thin adhesive films brusquely. In this work, a series of thin films of polyurethane‐based pressure‐sensitive adhesives have been synthesized and the factors responsible for collapsing of the adhesive films have been investigated. The pressure‐sensitive adhesives have been prepared by the use of polypropylene glycol and hydroxyl‐terminated polybutadiene macrodiols along with isophorone diisocyanate. The 40 wt % of solid contents have been maintained with hard segment contents of 28–64 wt %. Thin films of 70–100 μm have been utilized for probe‐tack analysis. The high storage modulus up to 1.83 MPa has been observed from dynamic mechanical analysis of PSA films. The adhesion properties evaluated by consideration of the ratio of the loss tangent to the storage modulus (tanδ/E′) for comparison resulted in the values from 0.03 to 0.45 MPa−1. The glass‐transition temperature is also appeared to be a decisive factor with variation from original values. The high‐molecular weight of macrodiols resulted in the loss of adhesiveness. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48395.

show abstract

Section: Methodsmentioning

confidence: 99%

Compositional effect on the deformation behavior of polyurethane pressure‐sensitive adhesive thin films

Akram

Zia

Saeed

et al. 2019

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The diisocyanate should, however, maintain its stability in a moist environment to detect the hydroxyl of macrodiol instead of water or any other source to form urethane linkage by avoiding urea linkage [ 8 ]. Waterborne dispersions (WBDs) are not just restricted to adhesives; rather, these are replacing all the major solvent borne systems, including wood finish, top coatings on automobiles, and other industries, to minimize the consumption of solvents [ 23 , 24 , 25 , 26 ]. For every application, these materials need the right proportion of constituents.…”

Section: Introductionmentioning

confidence: 99%

Role of Macrodiols in the Synthesis and Thermo-Mechanical Behavior of Anti-Tack Water Borne Polyurethane Dispersions

2022

Self Cite

View full text Add to dashboard Cite

The texture and molecular weight of polymer drastically affect the adhesion or tack strength. Waterborne polyurethane dispersions (WBPU) have been prepared using two different macrodiols of hydroxyl terminated polybutadiene (HTPB; Mn = 2912 g/mol) and four compositions of Polypropylene glycol (PPG Mn = 425, 1000, 2000, 2700 g/mol). The contents of the macrodiols have been varied using HTPB as 5, 10 and 15 mol%. The prepolymer of HTPB and Poly propylene glycol (PPG) have been developed using 4,4-Methylene bis(cyclohexyl isocyanate) (H12MDI) which is extended using 1, 4 butanediol (BD) followed by the dispersion of polymers in deionized water. Fourier Transform Infra-red spectroscopy (FTIR) is used to confirm the desired PU linkage. The probe tack graphs for tack analysis have not shown any plateau indicating absence of fibrillation. Two different values of glass transition temperature (Tg) have been observed for each dispersion using Differential Scanning Calorimetry(DSC). Storage modulus (E′) up to 3.97 MPa and (tanδ/E′) from 0.01–0.30 MPa−1 has been observed via Dynamic Mechanical Analysis (DMA). Introducing the HTPB has resulted in a decrease in the values of (tanδ/E′). No adhesion favorable parameters have been retrieved, indicating the molar variation a key factor in the development of anti-tack dispersions.

show abstract

“…The cost effective and environmental-friendly aqueous PUDs are excellent alternatives to their solventborne counterparts and have the potential to greatly reduce environmental pollution compared to using costly and harmful organic solvents. A huge number of investigations aimed at developing and improving the manufacturing process and quality of waterborne PUDs have been published [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. The early work of Dieterich and his co-workers in Bayer AG is very crucial because it pioneered the fundamental research in this area [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…The early work of Dieterich and his co-workers in Bayer AG is very crucial because it pioneered the fundamental research in this area [ 16 , 17 ]. Recently, waterborne PUDs have been selected to replace the solventborne PUDs in various applications, such as coatings for various fibers, paint additives, defoamers, pigment pastes, and textile dyes, associate thickeners, adhesives for alternative substrates, primers for metals, caulking materials, and emulsion polymerization media for different monomers [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. These environmentally friendly waterborne PUDs are expected to exhibit similar or superior performance compared to that of conventional solvent borne systems.…”

Section: Introductionmentioning

confidence: 99%

Waterborne Polyurethane Dispersions and Thin Films: Biodegradation and Antimicrobial Behaviors

Madbouly

2021

Molecules

View full text Add to dashboard Cite

Biodegradable and antimicrobial waterborne polyurethane dispersions (PUDs) and their casted solid films have recently emerged as important alternatives to their solvent-based and non-biodegradable counterparts for various applications due to their versatility, health, and environmental friendliness. The nanoscale morphology of the PUDs, dispersion stability, and the thermomechanical properties of the solid films obtained from the solvent cast process are strongly dependent on several important parameters, such as the preparation method, polyols, diisocyanates, solid content, chain extension, and temperature. The biodegradability, biocompatibility, antimicrobial properties and biomedical applications can be tailored based on the nature of the polyols, polarity, as well as structure and concentration of the internal surfactants (anionic or cationic). This review article provides an important quantitative experimental basis and structure evolution for the development and synthesis of biodegradable waterborne PUDs and their solid films, with prescribed macromolecular properties and new functions, with the aim of understanding the relationships between polymer structure, properties, and performance. The review article will also summarize the important variables that control the thermomechanical properties and biodegradation kinetics, as well as antimicrobial and biocompatibility behaviors of aqueous PUDs and their films, for certain industrial and biomedical applications.

show abstract

Investigation of non-adhesive behaviour of waterborne polyurethane dispersions

Cited by 11 publications

References 29 publications

Compositional effect on the deformation behavior of polyurethane pressure‐sensitive adhesive thin films

Compositional effect on the deformation behavior of polyurethane pressure‐sensitive adhesive thin films

Role of Macrodiols in the Synthesis and Thermo-Mechanical Behavior of Anti-Tack Water Borne Polyurethane Dispersions

Waterborne Polyurethane Dispersions and Thin Films: Biodegradation and Antimicrobial Behaviors

Contact Info

Product

Resources

About