Facile synthesis of narrow particle size distribution, high solid content, cationic polymer latexes by macroemulsion polymerization-based particle coagulation mechanism

Bai, Yang; Luo, Xueyan; Han, Yuanfei; Liu, Baijun; Zhang, Jinhui; Zhang, Mingyao

doi:10.1080/10601325.2019.1673175

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Certainly, this is very beneficial to the natural hand-feeling of cashmere fiber. 27 In this article, the BC polyurethane pursues the filmforming ability and the TC polyurethane pursues the antistatic property. According to Table 1, the static voltage half-life period of cashmere treated by AWPU or AS3 is reduced from 174.9 to 35.2 s or 18.0 s. Distinctly, both the anionic polyether polyurethanes we prepared possess a clear antistatic function because of their moisture absorption ability, which is derived from the hydrophilicity of the polyether chains in their macromolecules structure.…”

Section: Structure and Properties Of Anionic Polyurethanes For Bc And Tcmentioning

confidence: 99%

Design and Fabrication of Bistratal Functional Anionic Polyurethane Membrane on the Surface of Cashmere Fiber Based on Foaming Micro-Coating and the Studies of its Structure–Activity Relationships

Quan

Wang

et al. 2023

AATCC Journal of Research

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This research aims to reinforce the hand-feeling and washing fastness of anti-pilling and antistatic cashmere textiles based on a traditional “addition” technique. The technical proposal that effectively controls the distribution of polymer on cashmere textiles, based on foaming micro-coating technology, is studied and compared to prevent the superabundant polymer being fixed in the gaps between yarns/fibers and to ensure the graphene is semi-embedded in the membrane of “Table coating.” A couple of flexible hydrophilic anionic polyurethanes are used in micro-coating processing of cashmere purposefully. The effects of different coating technique on pilling, static, anti-ultraviolet, and washing resistance of coated cashmere textiles are studied. The results show that the semi-embedded graphene in the table coating membrane is meaningful to the static resistance. The pilling resistance of cashmere textile covered by polymer membranes is enhanced from grade 1–2 to grade 4–5 when the weight gain rate of “Bottom coating” polyurethane reaches 1.5% (o.w.f.), and its static voltage half-life decreases from 170 s to less than 2 s. In addition, the ultraviolet protection factor (UPF) value of coated cashmere is doubled, and anti-pilling and anti-static effects can withstand five washings.

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Section: Structure and Properties Of Anionic Polyurethanes For Bc And Tcmentioning

confidence: 99%

Design and Fabrication of Bistratal Functional Anionic Polyurethane Membrane on the Surface of Cashmere Fiber Based on Foaming Micro-Coating and the Studies of its Structure–Activity Relationships

Quan

Wang

et al. 2023

AATCC Journal of Research

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“…Certainly, these foams contribute to the natural hand-feeling property of cashmere. 26,27 For BC/TC polyurethane membranes, it is necessary to ensure they possess excellent soaking resistance to afford cashmere textiles with the desirable durability of pilling and static resistance. Of course, AWPU has poor alkali resistance, and thus is worthy of attention.…”

Section: Properties Of Anionic Polyurethanes For Bc and Tcmentioning

confidence: 99%

Anti-pilling and anti-static bifunctional finishing of cashmere knitted fabric based on combinatorial foaming microcoating of anionic hydrophilic polyurethane

Quan

Sun³

et al. 2022

Textile Research Journal

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This paper aims at avoiding the hand-feeling deterioration of cashmere fabric during the anti-pilling and anti-static functional finishing process, based on traditional “addition” technology. A couple of flexible anionic hydrophilic polyurethanes are purposefully designed, synthesized and employed in the construction of a combinatorial microcoating on the surface of cashmere fiber to endow it with pilling resistance and static resistance. In addition, a foam coating process based on polyurethanes, endowing cashmere with pilling resistance and static resistance from bottom coating and table coating, respectively, and including the hand-feeling of treated cashmere fabric, is studied. Then, the optimal processing technology of bifunctional finishing of the anti-pilling and anti-static properties of cashmere fabric is confirmed. The results show that the pilling resistance of cashmere fabric treated by the foam coating process will be enhanced from grade 2–3 to grade 4–5 when the weight gain rate of bottom coating polyurethane reaches 1.0% (o.m.f.). Moreover, the graphene semi-embedded in the table coating membrane could decrease the static voltage half-life of cashmere fabric from 180 s to less than 2 s.

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“…Commonly, the monomer addition rate, surfactant, and polymer content are just some of the factors that influence the particle-formation mechanism and the final structure of the polymer nanoparticle. A particle-coagulation phenomenon occurred in the second stage of the nucleation reaction [ 26 , 27 ]. In the coagulative nucleation process, mature polymer particles aggregate between these later to produce a coalescent particle in a soap-free polymerized system [ 14 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Coagulative Nucleation in the Copolymerization of Methyl Methacrylate–Butyl Acrylate under Monomer-Starved Conditions

et al. 2023

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Coagulative nucleation in the copolymerization of methyl methacrylate–butyl acrylate (MMA-BA) via semicontinuous emulsion heterophase polymerization (SEHP) under monomer-starved conditions in latexes with high solid content (50.0 wt %) and low concentrations of surfactant is reported. The SEHP technique allows the obtention of latex with high colloidal stability and has potential industrial application in polymer synthesis. High instantaneous conversions (>90%) and a high-ratio polymerization rate/addition rate (Rp/Ra) ≥ 0.9 were obtained at low times until the final copolymerization, which confirmed the starved conditions in the systems at the highest surfactant concentrations. The particle size exhibited a linear size increment at conversions between 0 and 40% induced by homogeneous nucleation, a transition region between 40 and 50%, and non-linear behavior at higher conversions by coagulative nucleation. These three behaviors were also observed in the particle surfactant coverage area (Sc), Z-potential, particle coagulation rate (dNp/dt) by the Smoluchowski model, final particle size (Dpz), and number particle (Np) through the reaction. By means of transmission electron microscopy (TEM) images, the onset of coagulation was observed from 50% of conversion until the end of the reaction. In addition, in both processes of copolymerization, tacticity was displayed (mainly syndiotacticity).

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Facile synthesis of narrow particle size distribution, high solid content, cationic polymer latexes by macroemulsion polymerization-based particle coagulation mechanism

Cited by 5 publications

References 24 publications

Design and Fabrication of Bistratal Functional Anionic Polyurethane Membrane on the Surface of Cashmere Fiber Based on Foaming Micro-Coating and the Studies of its Structure–Activity Relationships

Design and Fabrication of Bistratal Functional Anionic Polyurethane Membrane on the Surface of Cashmere Fiber Based on Foaming Micro-Coating and the Studies of its Structure–Activity Relationships

Anti-pilling and anti-static bifunctional finishing of cashmere knitted fabric based on combinatorial foaming microcoating of anionic hydrophilic polyurethane

Coagulative Nucleation in the Copolymerization of Methyl Methacrylate–Butyl Acrylate under Monomer-Starved Conditions

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