Wijaya, Gede Alvin Pramanda (2016) Pengaruh Variasi Fraksi Volume, Temperatur Curing Dan Post-Curing Pada Komposit Partikel Polyester-Hollow Glass Microspheres Terhadap Karakteristik Tarik. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Dewasa ini sudah banyak penelitian mengenai material
alternatif pengganti logam sebagai bahan dasar dalam bidang
otomotif dan bidang dirgantara, salah satunya adalah komposit.
Salah satu keunggulan komposit dibandingkan dengan logam
adalah strength to weigth ratio yang tinggi. Selain itu jika
dibandingkan dengan logam komposit juga memiliki kekuatan,
ketangguhan, dan ketahanan terhadap korosi yang tinggi.
Penelitian dilakukan dengan mencampurkan Polyester
resin dengan hollow glass microspheres. Spesimen uji tarik
diproduksi sesuai dimensi ASTM D 3039/D3039M dengan variasi
fraksi volume HGM 10%, 11%, 12%, 13%, 14%, dan 15%.
Spesimen menerima tiga perlakuan yang berbeda yaitu, spesimen
I di-curing pada termperatur kamar (±27°C) selama 24 jam,
spesimen II di-curing pada temperatur kamar (±27°C) selama 24
jam lalu post-curing pada temperatur 90°C selama 5 jam, dan
spesimen III di-curing pada temperatur 90°C selama 5 jam.
Setelah proses produksi, dilakukan pengujian bending untuk
mengetahui perubahan sifat mekanik yang terjadi pada komposit.
Hasil yang diperoleh dari percobaan ini adalah dari
penambahan fraksi volume HGM pada polyester berpengaruh
terhadap peningkatan tegangan tarik komposit sebesar 10% -
13,5%. Tegangan tarik pada spesimen polyester murni memiliki
tegangan tarik sebesar 43,22 MPa, sedangkan nilai tegangan tarik
maksimum terdapat pada spesimen uji dengan prosentase fraksi
volume hollow glass microspheres 14% pada curing temperatur
kamar dengan tegangan tarik komposit sebesar 50,36 MPa.
Temperatur curing tinggi dan perlakuan post-curing pada
komposit dengan matriks polyester dapat menurunkan jumlah
ikatan crosslink serta ikatan interface antara polyester dengan
HGM sehingga kekuatan tariknya menurun. Jika dibandingkan
antara kekuatan tariknya dengan spesimen komposit curing
temperatur kamar, kekuatan tarik dari spesimen komposit curing
temperatur tinggi dan post-curing lebih rendah. Hasil yang
didapat kekuatan tarik dari spesimen komposit partikel yang diberi
perlakuan curing temperatur 90o C selama 5 jam sebesar 19,46
MPa dan pada spesimen yang diberi perlakuan curing temperatur
kamar selama 24 jam kemudian di post-curing pada temperatur
90o C selama 5 jam sebesar 31,53 MPa
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Today has been a lot of research on alternatives to the
metal material as a base material in the areas of automotive and
aerospace fields, one of which is a composite. One of the
advantages compared to metal composite strength to weigth ratio
is high. In addition when compared to a composite metal also has
the strength, toughness, and high corrosion resistance.
The study was conducted by mixing Polyester resin with
hollow glass microspheres. Tensile test specimens produced in
accordance dimension ASTM D 3039 / D3039M with variations
HGM volume fraction of 10%, 11%, 12%, 13%, 14% and 15%.
Specimens received three different treatments ie, specimens I cured
on temperature room (± 27 ° C) for 24 hours, the specimen IIcuring
at room temperature (± 27 ° C) for 24 hours and then postcured
at a temperature of 90 ° C for 5 hours, and III specimens
cured at a temperature of 90 ° C for 5 hours. After the production
process, the bending test conducted to determine changes in
mechanical properties that occur in the composite.
Results obtained from these experiments is the addition of
the volume fraction of HGM on polyester affect the increase in
composite tensile stress by 10% - 13.5%. Tensile stress on
specimens of pure polyester has a tensile strength of 43.22 MPa,
while the value of maximum tensile stress test specimens contained
in the percentage of the volume fraction of hollow glass
microspheres 14% at room temperature curing composite tensile
stress of 50.36 MPa. High curing temperature and post-curing
treatment in composites with polyester matrix can reduce the
amount of crosslink bonds and bond interface between the
polyester with HGM so that its strength decreases. If the
comparison between the strength of its appeal with room
temperature curing composite specimens, the tensile strength of the
composite specimen high temperature curing and post-curing is
lower. The results of tensile strength of the composite particle
specimens treated curing temperature of 90 ° C for 5 hours of 19.46
MPa and the specimens treated curing at room temperature for 24
hours and then in the post-curing at a temperature of 90 ° C for 5
hours amounting to 31.53 MPa.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 620.118 Wij p |
| Uncontrolled Keywords: | Tarik, curing, glass transition temperature, hollow glass microspheres, komposit, polyester, post-curing |
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL240.5 Composite materials |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 08 Jun 2020 05:59 |
| Last Modified: | 08 Jun 2020 05:59 |
| URI: | http://repository.its.ac.id/id/eprint/76116 |
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