Perbaikan Sifat Mekanik dan Penyerapan Air Komposit Polyester Diperkuat Serat Timoho – PVA Coating

Authors

  • Suteja

    Jurusan Teknik Mesin, Universitas Mataram
    Author
  • Syarif Hidayatullah

    Jurusan Teknik Mesin, Universitas Mataram, Indonesia
    Author

Keywords:

Komposit Polyester, Serat Timoho, PVA Coating, Sifat Mekanik, Penyerapan Air

Abstract

ABSTRAK

Investigasi ini memaparkan metode efektif perbaikan performa serat timoho sebagai penguat komposit polyester yaitu dengan perlakuan NaOH + PVA coating. Serat timoho sebagai penguat komposit polyester dibagi menjadi dua tipe yaitu serat timoho tanpa perlakuan dan serat diperlakukan NaOH + PVA coating. Komposit polyester – serat timoho difabrikasi dengan metode hand lay up. Performa komposit yang dikembangkan kemudian diuji karakteristik mekanik, penyerapan air, ketahanan termal dan morphologynya. Hasil pengujian memaparkan bahwa kekuatan tarik komposit mengalami peningkatan secara signifikan setelah perlakuan NaOH + PVA coating. Perlakuan PVA coating menurunkan persentase elongasi komposit, akan tetapi meningkatkan modulus elastisitas komposit. Hal serupa juga terjadi pada ketahanan termal dan ketahanan terhadap air yang meningkat secara signifikan. Pengamatan morphology foto SEM komposit polyester - timoho PVA coating menunjukkan ikatan interface yang lebih baik dengan matrik dibandingkan dengan kompsoit polyester – serat timoho tanpa perlakuan. Dari keseluruhan hasil pengujian menunjukkan bahwa perlakuan PVA coating serat timoho merupakan metode efektif dalam memperbaiki karakteristik komposit sebelum diaplikasikan pada lingkungan dengan kondisi berfluktuatif. 

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Published

2025-06-23