Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Enhanced Properties of Epoxy Molding Compound by Plasma Polymerization Coating of Silica

실리카의 플라즈마 중합 코팅에 의한 에폭시 봉지재의 물성 향상 연구

  • Roh, J.H. (Department of Materials of Science and Engineering, Kwangju Institute of Science and Technology) ;
  • Lee, J.H. (Department of Materials of Science and Engineering, Kwangju Institute of Science and Technology) ;
  • Yoon, T.H. (Department of Materials of Science and Engineering, Kwangju Institute of Science and Technology)
  • 노준호 (광주과학기술원 신소재공학과) ;
  • 이지훈 (광주과학기술원 신소재공학과) ;
  • 윤태호 (광주과학기술원 신소재공학과)
  • Received : 2001.03.28
  • Accepted : 2001.04.28
  • Published : 2001.06.26
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Abstract

Silica for Epoxy Molding Compound (EMC) was coated via plasma-polymerization with RF plasma (13.56 MHz) as a function of treatment time, power and pressure. 1,3-diaminopropane, allylamine, pyrrole, 1,2-epoxy-5-hexene, allylmercaptan or allylalcohol were utilized for plasma polymerization coating and adhesion of coated silica was evaluated by measuring flexural strength. CTE and water absorption of EMC were also measured, and fracture surface of flexural specimen was analyzed by SEM in order to elucidate the failure mode. The plasma polymer coated silica was analyzed by FT-IR and reactivity of plasma polymer coating with epoxy resin was evaluated with DSC in order to investigate the adhesion mechanism. The EMC prepared from the silica coated with 1,3-diaminopropane or allylamine exhibited high flexural strength, low CTE, and low water absorption compared with the control sample, and also exhibited 100% cohesive failure mode. These results can be attributed to the chemical reaction between the functional groups in the plasma polymer coating and epoxy resin, and also consistent with the results from FT-IR and DSC analysis.

Epoxy molding compound (EMC)에 사용되는 실리카를 13.56 MHz 플라즈마 중합 장치를 이용하여 코팅하였으며, 코팅시간, 플라즈마전압, 내부압력을 변화시키면서 코팅조건을 최적화하였다. 플라즈마 중합 코팅용 단량체로는 1.3-diaminopropane, allylamine, pyrrole, 1,2-epoxy-5-hexene, allylmercaptan 및 allylalcohol을 사용하였으며, 코팅된 실리카의 접착성은 굴곡강도 측정으로 분석하였다. 또한 열팽창 계수 (CTE) 및 수분 흡습률 변화를 측정하였으며, 파괴 단면을 SEM으로 분석하여 접착 특성을 규명하고자 하였다. 플라즈마 중합 코팅된 실리카와 에폭시 수지간의 접착기구를 규명하기 위하여 플라즈마 고분자 코팅을 FT-IR로 분석하였으며, DSC를 이용하여 코팅된 실리카와 에폭시 수지간의 반응성도 고찰하였다. 1,3-diaminopropane과 allylamine으로 코팅된 실리카를 함유하는 EMC는 비교시편에 비하여 높은 굴곡강도, 낮은 CTE 및 낮은 흡습율을 보였으며, SEM 분석 결과 100% cohesive failure 거동을 나타내었다. 이러한 결과는 고분자 코팅내의 아민 반응기와 에폭시 수지간의 화학적 결합에 의한 것으로 판단되며, FT-IR 및 DSC 분석결과와 부합된다.

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