Penentuan stabilitas Polydimethylsiloxane (PDMS) 1,00-4,00 cSt terhadap Waktu Simpan

Sumiyanto, Eko (2019) Penentuan stabilitas Polydimethylsiloxane (PDMS) 1,00-4,00 cSt terhadap Waktu Simpan. Diploma thesis, UIN Sunan Gunung Djati.

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Abstract

Polydimethylsiloxane (PDMS), (CH3)3SİO-[Si(CH3)2O]n-Si(CH3)3, or better known as Silicone Oil is an important fluid in vitreoretinal surgery. PDMS is non-absorbent (nanoabsorbable) and has sufficient strength as a tamponade agent so that it can be used as a vitreous humour replacement fluid in the eye. The expected PDMS transmittance value is the same as the vitreous humour transmittance value which reaches 100% so that it can be fully transmitted in the range of visible light. In its application as a vitreous humor replacement liquid, PDMS cannot be separated from ultraviolet (UV) exposure. In this study, the effect of storage time on PDMS stability will be studied. PDMS polymer was synthesized from octamethylcyclotetrasiloxane (D4) and hexamethyldisiloxane (MM) using KOH as initiator with the ring opening polymerization technique. The results of PDMS polymer obtained were tested for stability against storage time with various parameters including surface tension, refractive index, viscosity, and transparance. Its stability against exposure to UV rays is expressed in changes in surface tension, refractive index, viscosity and PDMS transmittance to storage time. The result is that the three PDMS that have been synthesized successfully show a perfect transmittance value of 100%, which means that all light passing through the sample will be passed on entirely. Refractive index for PDMS 1.07 Pa. S; 1.69 Pa.s and 3.00 Pa. S respectively are 1,404; 1.4092 and 1.4121. PDMS surface tension 1.07 Pa.s; 1.69 Pa.s and 3.00 Pa.s respectively in the amount of 19 m.N / m; 19.7 m.N / m and 18 m.N / m. The three PDMS that have been successfully synthesized resemble all functional groups such as those possessed by the standard PDMS, namely absorption that comes from the vibrations of Si – O – Si, Si(CH3)2, Si(CH3)3, SiCH3., Si – C dan C – H bonds .

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