Modification of polyethylene using side-chain crystalline block copolymer and evaluation of hydrophilicity

Miho, Yuga; Hirai, Sho; Nakano, Ryoko; Sekiguchi, Hiroshi; Yao, Shigeru

doi:10.1038/s41428-018-0031-0

Cited by 16 publications

(12 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polymerization of SCCBC and surface modification was conducted as described previously [26,27]. Two different kinds of SCCBC; BHA-TBAEMA, and STA-DEEA, were prepared in this study.…”

Section: Polymerization Of Sccbcmentioning

confidence: 99%

“…As a result, the functional units of SCCBC covered the LLDPE surface, which imparted specific characteristics to the LLDPE. It was demonstrated that LLDPE, LDPE, and HDPE surfaces could show increased dispersibility, hydrophilicity, and adhesive properties using SCCBC [25][26][27]. In this study, the development of surface modification on UHMWPE surfaces using SCCBC to impart adhesive and hydrophilic properties is investigated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers

Hirai

Ishimoto

Phanthong

et al. 2020

Journal of Polymer Engineering

Self Cite

View full text Add to dashboard Cite

Ultra-high-molecular-weight polyethylene (UHMWPE) has been widely used in industry; however, the applications for UHMWPE are limited because of low hydrophilic and adhesive properties. Herein, we developed the surface properties of UHMWPE by using side-chain crystalline block copolymers (SCCBCs), which consist of a side-chain crystalline unit and a functional unit. This process only required immersing the UHMWPE film in the diluted SCCBC solution, which enabled the UHMWPE surface to be coated homogeneously. The results of the contact angle and tensile shear test showed that the surface of UHMWPE modified with SCCBC was improved in hydrophilicity and adhesive properties. In addition, high adhesion strength was measured on UHMWPE surfaces dipped in a SCCBC solution at high temperature with the UHMWPE film becoming elongated at all parts other than the adhesion contact area.

show abstract

“…Polymerization of SCCBC and surface modification was conducted as described previously [26,27]. Two different kinds of SCCBC; BHA-TBAEMA, and STA-DEEA, were prepared in this study.…”

Section: Polymerization Of Sccbcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers

Hirai

Ishimoto

Phanthong

et al. 2020

Journal of Polymer Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…An acrylate polymer with longer alkyl groups of more than 6 carbons as side chains is semi-crystalline and has strong hydrophobic properties and a low glass transition temperature. Among these polymers, poly(stearyl acrylate) (PSA) has been utilized for applications such as the surface modification of polyethylene [ 21 ], control of polymer deterioration [ 22 ], and as a positive temperature coefficient (PCT) thermistor [ 23 ]. The crystalline region forms as the side chains line up in parallel for a semi-crystalline polymer with a side chain, which is different from that of a semi-crystalline main chain polymer, such as polyethylene.…”

Section: Introductionmentioning

confidence: 99%

Removal of Trithiocarbonyl End Group of RAFT-Polymerized Poly(stearyl acrylate) and Effect of the End Group on Thermal and Structural Properties

2021

View full text Add to dashboard Cite

The effect of a long alkyl end group on the thermal and structural properties of RAFT (reversible addition-fragmentation chain transfer)-polymerized poly(stearyl acrylate) (PSA) was investigated. RAFT-polymerized PSA was prepared using 2-cyano-2-[(dodecylsulfanylthiocarbonyl) sulfanyl] propane (CDTP) with long alkyl group as a chain transfer agent and azobisisobutyronitrile (AIBN) as an initiator. The RAFT polymerization resulted in the polymerized structure having trithiocarbonyl (TTC) at one end and isobutyronitrile at the other end. RAFT-polymerized PSA was prepared with two different molecular weights. The TTC end group was replaced by isobutyronitrile using radical reaction with AIBN through optimization of the conditions, which resulted in isobutyronitrile at both ends. The effect of the end group on the thermal and structural properties was investigated using differential scanning calorimetry and X-ray diffraction, and the results indicated that the long alkyl group from TTC lowers the melting point and semi-crystalline structure in the case of low molecular weight PSA.

show abstract

“…The side-chain crystalline block copolymer (SCCBC), a dispersant that reduces the viscosity of a concentrated polyethylene (PE) particle suspension, was developed by Yao et al [1][2][3][4][5][6]. The SCCBC consists of a long alkane sidechain unit that can be adsorbed on the crystalline surface of PE particles via van der Waals forces and a functional unit (FU) with solvent affinity.…”

Section: Introductionmentioning

confidence: 99%

A preliminary animal study of thermal rheology fluid as a new temperature-dependent liquid intravascular embolic material

Imai

Watanabe

Nitta³

et al. 2021

Jpn J Radiol

Self Cite

View full text Add to dashboard Cite

Purpose Thermal rheology (TR) fluid, which comprises polyethylene (PE) particles, their dispersant, and solvent, is a material that increases in viscosity to various degrees depending on the type and ratio of these constituents when its temperature rises. The viscosity of type 1 (TRF-1) increases more than that of type 2 (TRF-2) near rabbit body temperature. This preliminary animal study aimed to determine the basic characteristics and embolic effect of TR fluid by comparing TRF-1 and TRF-2. Materials and methods Twenty-four Japanese white rabbits underwent unilateral renal artery embolization using TRF-1 or TRF-2 and follow-up angiography at 7 or 28 days (4 subgroups, n = 6 each). Subsequently, the rabbits were euthanized, and the embolized kidneys were removed for pathological examination. The primary and final embolization rates were defined as the ratio of renal artery area not visible immediately after embolization and follow-up angiography, respectively, to visualized renal artery area before embolization. The final embolization rate and maximum vessel diameter filled with PE particles were compared between materials. Moreover, the embolic effect was determined to be persistent when a two-sided 95% confidence interval (CI) for the difference in means between the embolization rates was < 5%. Results The final embolization rate was significantly higher for the TRF-1 than for the TRF-2 at both 7 (mean 80.7% [SD 18.7] vs. 28.4% [19.9], p = 0.001) and 28 days (94.0% [3.5] vs. 37.8% [15.5], p < 0.001). The maximum occluded vessel diameter was significantly larger for TRF-1 than for TRF-2 (870 µm [417] vs. 270 µm [163], p < 0.001). The embolic effect of TRF-1 was persistent until 28 days (difference between rates − 3.3 [95% CI − 10.0–3.4]). Conclusion The embolic effect of TRF-1 was more persistent than that of TRF-2, and the persistency depended on the type and ratio of TR fluid constituents.

show abstract

Modification of polyethylene using side-chain crystalline block copolymer and evaluation of hydrophilicity

Cited by 16 publications

References 18 publications

Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers

Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers

Removal of Trithiocarbonyl End Group of RAFT-Polymerized Poly(stearyl acrylate) and Effect of the End Group on Thermal and Structural Properties

A preliminary animal study of thermal rheology fluid as a new temperature-dependent liquid intravascular embolic material

Contact Info

Product

Resources

About