Dynamic Mechanical and Morphological Study on Model Pressure Sensitive Adhesive Based on Poly(styrene-b-butadiene-b-styrene)

Sung, Ick Kyung; Kim, Kwang-Suk; Chin, In‐Joo

doi:10.1295/polymj.30.181

Cited by 12 publications

(16 citation statements)

References 15 publications

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“…Another study of HMAs based on an SBS copolymer was carried out by Sung and coworkers. 8 The results they reported nicely complement the former findings of Galá n et al 7 From dynamic mechanical measurements and morphological observations they verified that the storage modulus (GЈ) of the blend increased when the tackifier was compatible with the polystyrene end block or incompatible with the SBS copolymer. However, the highest peel strength was observed for the compatible blends.…”

Section: Introductionsupporting

confidence: 83%

Thermal characterization of three‐component blends for hot‐melt adhesives

Fernandes¹,

Lombardi²,

Solaro³

et al. 2001

J of Applied Polymer Sci

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ABSTRACT:Traditional solvent-based adhesives used in the footwear industry have been demonstrated as harmful to the workers' health and environment. Solvent-free three-component adhesives (hot-melt adhesives or HMAs) for various applications including the leather and footwear industry are becoming more and more attractive. Thus, the formulation of a three-component HMA was realized in this study. Thermogravimetry, differential scanning calorimetry, and the apparent strength of the adhesive bond were used to investigate the relationship between their properties and the polymer/wax/resin compositions. The thermal stability of HMA formulations was determined and compared with thermal traces based on an additive weight computation of the single components' thermal profiles. All HMA formulations showed a direct relationship between the glass-transition temperature and the apparent adhesive shear strength at the leather-rubber interface.

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Section: Introductionsupporting

confidence: 83%

Thermal characterization of three‐component blends for hot‐melt adhesives

Fernandes¹,

Lombardi²,

Solaro³

et al. 2001

J of Applied Polymer Sci

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“…The crystallization behavior was also observed by time‐resolved WAXD experiment at Pohang Light Source (beamline 3C2) in Pohang, Korea, using monochromatic X‐ray with a wavelength of 1.608A. Details of the experimental procedure was described elsewhere 22. Samples were hot pressed into 1‐mm sheets, and the scattering pattern was obtained isothermally and as a function of the temperature as well.…”

Section: Methodsmentioning

confidence: 99%

Crystallization behavior of biodegradable amphiphilic poly(ethylene glycol)-poly(L-lactide) block copolymers

Kim

Chung

Chin

et al. 1999

J. Appl. Polym. Sci.

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Poly(ethylene glycol)-poly(L-lactide) diblock and triblock copolymers were prepared by ring-opening polymerization of L-lactide with poly(ethylene glycol) methyl ether or with poly(ethylene glycol) in the presence of stannous octoate. Molecular weight, thermal properties, and crystalline structure of block copolymers were analyzed by 1 H-NMR, FTIR, GPC, DSC, and wide-angle X-ray diffraction (WAXD). The composition of the block copolymer was found to be comparable to those of the reactants. Each block of the PEG-PLLA copolymer was phase separated at room temperature, as determined by DSC and WAXD. For the asymmetric block copolymers, the crystallization of one block influenced much the crystalline structure of the other block that was chemically connected to it. Time-resolved WAXD analyses also showed the crystallization of the PLLA block became retarded due to the presence of the PEG block. According to the biodegradability test using the activated sludge, PEG-PLLA block copolymer degraded much faster than PLLA homopolymers of the same molecular weight.

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“…As for the rosin resins, they are unstable due to the existence of the unsaturated chemical bonds, but such a drawback can be improved via several chemical modifications. 5,14 These modifications include esterification, hydrogenation, dimerization, functionalization, and any combination of these.…”

Section: ■ Introductionmentioning

confidence: 99%

“…A pressure-sensitive adhesive utilizes an A–B–A-type triblock copolymer as a base polymer. − Especially, a styrenic block copolymer, which forms spherical microdomains, such as a polystyrene- block -polyisoprene- block -polystyrene (SIS), has been widely used. ,− , In such A–B–A-type triblock copolymers, the hard phases (A) play the role of physical cross-linking points for the soft matrix phase (B) with the bridge conformation of the B chains. , In addition, as a basic demand from the viewpoint of the pressure-sensitive adhesives, the hard A phase contributes cohesive property and the soft B phase does initial adhesion to the adherend (so-called tackiness). Thus, this base copolymer is required to impart such two main functions for application as the pressure-sensitive adhesive.…”

Section: Introductionmentioning

confidence: 99%

“…There are hydrocarbon resins and rosin resins as examples of different types of tackifier . The hydrocarbon resins are byproducts of naphtha cracking and can be divided into two groups: C5 and C9 resins. − C5 and C9 resins are polymers synthesized from monomers with five carbon atoms and those from nine-carbon aromatic monomers, respectively. Note here that such monomers are mixtures of substances of which chemical structures are clarified in detail in the literature. − There is also a C5–C9 resin in which C5 and C9 resins are covalently bonded.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Solubility Difference of Tackifier to Respective Components of Block Copolymers on Microphase-Separated Structures in Coated Layers of Pressure-Sensitive Adhesive Prepared by Solution Coating Process

Doi

Takagi

Igarashi

et al. 2020

ACS Appl. Polym. Mater.

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Effects of solubility difference of tackifier to respective components of block copolymers on microphase-separated structures were examined using coated layers of the polystyrene-block-polyisoprene-blockpolystyrene triblock copolymer and polystyrene-block-polyisoprene diblock copolymer blend, which forms spherical microdomains of polystyrene (PS) in the polyisoprene (PI) matrix, mixed with three types of tackifiers: aliphatic (C5) resin, aliphatic−aromatic (C5−C9) resin, and rosin ester (RE) resin. We performed small-angle X-ray scattering (SAXS) measurements to evaluate d spacing of the (110) planes of body-centered cubic (bcc) lattice and the average radius (R) of the PS spheres. Then, it was found that both d and R decreased with an increase in the tackifier content for all types of tackifiers. This decreasing tendency can be explained by considering that the added tackifier plays the role of solvent to swell the PI block chains to meet the wet-brush condition, resulting in a decrease in the aggregation number of the PS chains in a sphere. Thus, the PS sphere is smaller compared to the case without tackifier. The volume fraction of PS calculated from d and R values by assuming the bcc lattice was decreased with the tackifier content for the case of C5 and C5−C9 resins, while it was constant for the case of the RE resin. These results ensure that the RE resin plays the role of the neutral solvent while the other tackifiers play roles of PI-selective solvent. To discuss the long-term durability of nanostructures, gradual temporal changes in the nanostructures were also examined up to 30 days at 50 °C. As a consequence, the specimen mixed with the RE resin is considered to be suitable because the change in the nanostructures was the least for this case.

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Dynamic Mechanical and Morphological Study on Model Pressure Sensitive Adhesive Based on Poly(styrene-b-butadiene-b-styrene)

Cited by 12 publications

References 15 publications

Thermal characterization of three‐component blends for hot‐melt adhesives

Thermal characterization of three‐component blends for hot‐melt adhesives

Crystallization behavior of biodegradable amphiphilic poly(ethylene glycol)-poly(L-lactide) block copolymers

Effects of Solubility Difference of Tackifier to Respective Components of Block Copolymers on Microphase-Separated Structures in Coated Layers of Pressure-Sensitive Adhesive Prepared by Solution Coating Process

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