• Title/Summary/Keyword: epoxy terminated siloxane

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Curing Kinetics and Mechanical Properties for Siloxane Contained ETSO-DDM/BPH Epoxy System (Siloxane을 포함한 ETSO-DDM/BPH계 에폭시 시스템의 경화동력학 및 기계적 특성 분석)

  • Kim, Hyo-Mi;Kim, Jong-Min;Han, Jung-Geun;Kim, Joo-Heon
    • Polymer(Korea)
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    • v.33 no.4
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    • pp.364-370
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    • 2009
  • The curing kinetics and mechanical properties of siloxane-diaminodiphenylmethane (ETSO-DDM) on the two kinds of bisphenol (BPH) system which are DGEBA and DGEBF were investigated with the different contents of ETSO. To investigate the curing kinetics of the ETSO-DDM/BPH systems, differential scanning calorimeter (DSC) was used. The mechanical properties of ETSO-DDM/BPH systems were also examined by universal testing machine (UTM), tensile test and flexural test. From experimental results, the activation energies and mechanical properties of ETSO-DDM/BPH were improved with the decrease contents of ETSO. This was due to the high cross-linking density made from short length of ETSO-DDM, resulting in improving the mechanical inter-locking between ETSO-DDM and BPH in these systems.

Characterization for Blend of Siloxane Prepolymer onto Epoxy Resin (Siloxane Prepolymer의 에폭시수지 블렌드 특성)

  • Kim, Kong-Soo;Park, Jun-Ha;Shin, Jae-Sup;Kim, Yeong-Jun
    • Elastomers and Composites
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    • v.32 no.3
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    • pp.179-185
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    • 1997
  • In solution and melting state, SiOD prepolymer was prepared by cured excess DDM with epoxy-terminated siloxane oligomers to control phase separation when DGEBA was blended with PDMS. DGEBA/SiOD prepolymer was also cured at $150^{\circ}C$ for 3hrs. Mechanical and thermal properties of the cured prepolymer specimen were investigated. DGEBA/SiOD60 specimen blended SiOD prepolymer had the best flexural strength, modulus and impact strength. To show crack-formation procedure to morphology, DGEBA/DDM neat specimen was flowed homogeneously in direction of crack energy, whereas DGEBA/SiOD$(30{\sim}60)$ specimen showed heterogeneously dispersed particles and scattered domain of crack energy, but DGEBA/SiOT specimen showed homogeneous phase.

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