Preparation and characterization of polarity-modulated SIS-based hot-melt pressure-sensitive adhesives

Zhao, Zhongfu; Wang, Zhanyue; Zhang, Chunqing

doi:10.1080/01694243.2014.887255

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…These microphases can be targeted with additives such as tackifying resin or diblock copolymer, allowing for the manipulation of the microstructure and adhesive properties. − The adhesive polymers discussed in this work are branched copolymers. The use of pendant groups that are distinctly different (chemically or structurally) from the backbone provides another means for achieving novel property combinations. − Previously, it was demonstrated that adhesive properties could be finely tuned through changes in low-molecular-weight pendant group compositions. Extending these chains produces long side chains and the possible aggregation of microstructures, as found for linear block copolymers.…”

Section: Introductionmentioning

confidence: 99%

Influence of Phase Separation on Performance of Graft Acrylic Pressure-Sensitive Adhesives with Various Copolyester Side Chains

Wang

Weng

et al. 2018

ACS Omega

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Acrylic pressure-sensitive adhesives with various polyester side-chain lengths were synthesized to investigate the effect of branching on phase separation and polymer mechanical performance. The polyester macromonomers (MMs) were produced through ring-opening co-polymerizations of l -lactide ( l -LA) and ε-caprolactone (ε-CL) initiated with 2-hydroxyethyl methacrylate (HEMA), which provides the polyester chains with terminal vinyl groups. By varying the HEMA content, a range of MM chain lengths constructed from L 10 C 4 (five l -LA and four ε-CL units) to L 100 C 40 were obtained at a constant monomer mole ratio. Copolymerization of 2-ethylhexyl acrylate and acrylic acid with these MMs at constant mass composition provided a series of comb copolymers consisting of acrylic backbones with polyester branches of various chain lengths. Characterization of thin films cast from the polymers using thermal analysis and scanning probe microscopy showed a transition from a homogeneous phase to the formation of distinct microphases with increasing branching chain lengths. Rheological analysis of the linear viscoelastic responses was also used through small-amplitude oscillatory shear, and dynamic master curves were constructed by time–temperature superposition. The rheological data were also consistent with phase separation for the longer side-chain lengths of L 50 C 20 and L 100 C 40 . The extra elastic contribution at low frequency and the temperature dependence of a T both show obviously effect of separated phases. Performance testing of polymer films showed that the chain extension resulted in a significant increase in both peel strength and shear resistance, which was accompanied by a modest decrease in film tackiness. The results demonstrate that tailoring branch chain structures provide a promising means for controlling the properties of the high-biomass content adhesive polymers.

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Section: Introductionmentioning

confidence: 99%

Influence of Phase Separation on Performance of Graft Acrylic Pressure-Sensitive Adhesives with Various Copolyester Side Chains

Wang

Weng

et al. 2018

ACS Omega

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“…Briefly, when the adhesive weight percent was smaller or larger than 25% in this study, the cohesive forces decreased leading to lower holding power. Similarly, rational polarity (0.05-0.1) of the chosen type of solvent is beneficial to maintaining the original structures of the adhesive [11], which helps the polar and non-polar molecules in HMPSA reach equilibrium in order to produce a better holding power performance. Therefore, choosing an intermediate level of adhesive weight percent and a solvent with intermediate level of polarity may produce a higher holding power.…”

Section: Bond Strengthmentioning

confidence: 99%

“…Tests were conducted after solvent drying. Zhao et al [11,12] prepared a series of HMPSA by melt-mixing all components at elevated temperature. The prepared adhesive was discharged from the mixer and coated onto a PET substrate at similarly high temperature.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Processing Hot-Melt Pressure-Sensitive Adhesive (HMPSA) with Solvent in the Lab

et al. 2021

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Hot-melt pressure-sensitive adhesive (HMPSA) is an environmentally benign adhesive which is typically processed without solvent in industries. However, casting solution method is commonly used for experimental purposes in the lab for convenience. Therefore, seven types of solvent with different polarities, including toluene as the most commonly used solvent, were investigated in this work to study the feasibilities. Quick bond strength and holding power were tested with different types of solvents and different adhesive weight percent in the prepared solutions. Through viscosity measurement, thermal analysis, and compositional analysis, the correlation between the chosen solvents and adhesive performance was further explored. It was found that the differences in the obtained bond strength of HMPSA treated with a variety of solvents were due to physical reasons instead of chemical reactions, and a solvent with similar polarity to toluene (e.g., tetrachloride, octane) should be considered as an option because a similar polymer chain relaxation could be maintained as the original HMPSA without solvent treatment. In this study, the mechanism of choosing toluene as common solvent for HMPSA testing was analyzed, and the feasibility of optional solvents was discussed.

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Preparation and drug release performance of amphiphilic medical hot‐melt pressure sensitive adhesives based on polystyrene‐isoprene‐styrene

Zhou

Guo

2023

J of Applied Polymer Sci

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Hot-melt pressure-sensitive adhesives (HMPSAs) with polystyrene-isoprenestyrene (SIS) as the backbone material are widely used in transdermal drug delivery systems (TDDS) because of their high cohesive strength and drug-carrying capacity. However, it is restricted by its high hydrophobicity when loaded with hydrophilic drugs. In this study, HMPSAs with amphiphilic properties were created by mixing SIS with fatty alcohol polyoxyethylene ether (AEO-9) and polyethylene glycol (PEG) of different molecular weights to improve the ability of HMPSAs to deliver hydrophilic drugs. The effects of different molecular weights of PEG on the hydrophilicity of HMPSAs were also investigated. Additionally, gardenia glycosides and oleanolic acid were selected for drug release experiments.Compared to untreated HMPSAs, HMPSAs modified with AEO-9 and PEG2000 could convert from hydrophobic to hydrophilic. The contact angle could be reduced from 91.8 to 25.6 , and the 24-hour water absorption could be raised by 170%. The drug release experiments demonstrate that SIS/AEO-9/PEG2000 enhances the release efficiency of the hydrophilic drug gardenia jasminoides by 69%. In summary, as a novel amphiphilic medicinal HMPSAs, SIS/AEO-9/PEG offered a broad application promise in hydrophilic drug release.

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Preparation and characterization of polarity-modulated SIS-based hot-melt pressure-sensitive adhesives

Cited by 9 publications

References 38 publications

Influence of Phase Separation on Performance of Graft Acrylic Pressure-Sensitive Adhesives with Various Copolyester Side Chains

Influence of Phase Separation on Performance of Graft Acrylic Pressure-Sensitive Adhesives with Various Copolyester Side Chains

Feasibility of Processing Hot-Melt Pressure-Sensitive Adhesive (HMPSA) with Solvent in the Lab

Preparation and drug release performance of amphiphilic medical hot‐melt pressure sensitive adhesives based on polystyrene‐isoprene‐styrene

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