Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Effects of Tri-functional Monomers on the Properties of UV-curable Pressure Sensitive Adhesives (PSAs)

삼관능 모노머의 종류 및 함량에 따른 자외선 경화형 감압 점착 필름의 특성

  • Received : 2019.03.12
  • Accepted : 2019.03.19
  • Published : 2019.03.31
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Abstract

In this study, polybutadiene based di-functional urethane acrylate oligomer (PB-UAO) were synthesized from polybutadiene diol and isophorone diisocyanate. And then, pressure sensitive adhesive films were prepared by mixing with synthesized oligomer, tri-functional acrylate monomer (Tris(2-acryloyloxyethyl) isocyanurate (TAOEIC) or Trimethylolpropane triacrylate (TMPTA) or Pentaerythritol triacrylate (PETA)), mono-functional acrylate monomer (Stearyl acrylate) and UV initiators. Effects of types and contents of trifunctional acrylate monomers on peel strength, tensile strength, elongation, thermal stability and water absorption property were studied. As the contents of tri-functional acrylate monomer increased, and as the molecular weight of tri-functional acrylate monomer decreased, peel strength, elongation and water absorption showed a tendency to decrease whereas tensile strength and thermal stability showed a tendency to increase.

Polybutadiene diol (PBD)과 isophorone diisocyanate (IPDI)의 반응을 통하여 이관능 우레탄 아크릴레이트 올리고머 (PB-UAO)를 합성하고, 여기에 삼관능 아크릴레이트 모노머 (Tris(2- acryloyloxyethyl) isocyanurate (TAOEIC), 또는 Trimethylolpropane triacrylate (TMPTA) 또는 Pentaerythritol triacrylate(PETA)), 단관능 아크릴레이트 모노머 (Stearyl Acrylate) 그리고 광개시제를 혼합한 후 이형필름 위에 코팅하고 자외선 경화를 통하여 감압 점착 필름을 제조하였다. 삼관능 아크릴레이트 모노머의 구조 및 함량에 따른 감압 점착제의 박리강도, 인장강도, 신율, 열안정성 및 흡습 특성의 변화를 고찰하였다. 삼관능 아크릴레이트 모노머의 함량이 증가할수록, 그리고 분자량이 작을수록 감압 점착 필름의 박리강도, 연신율 및 흡습율은 감소하는 경향을 보였으며, 인장강도 및 열안정성은 증가하는 것을 확인하였다.

Keywords

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Figure 1. Synthetic process of polybutadiene based urethane acrylate oligomer (PB-UAO).

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Figure 2. FT-IR spectra of synthesized polybutadiene based urethane acrylate oligomer (PB-UAO).

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Figure 3. Initial peel strength of PSA films as a function of tri-functional acrylate monomers.

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Figure 5. Tensile strength of PSA films as a function of tri-functional acrylate monomers.

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Figure 4. Peel strength of PSA films after aging as a function of tri-functional acrylate monomers.

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Figure 6. Elongation of PSA films as a function of tri-functional acrylate monomers.

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Figure 7. Thermal stability of PSA films as a function of tri-functional acrylate monomers.

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Figure 9. Water absorption properties of PSA films as a function of tri-functional acrylate monomers.

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Figure 8. TGA graph of PSA films including 7.5 wt% of tri-functional acrylate monomers.

Table 1. Materials used in polybutadiene based urethane acrylate oligomer (PB-UAO) synthesis

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Table 2. Compositions of pressure sensitive adhesive films

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