Di Amora, Saldhyna (2015) Modifikasi Permukaan Pet Dengan Polimer-Polimer Fungsional Dari Agen Raft Untuk Mencapai Sifat Antibakteri. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Modifikasi permukaan PET dengan polimer-polimer fungsional dari polimerisasi
RAFT telah diteliti sebelumnya. Polimerisasi awal menggunakan stirena telah
diteliti untuk mengetahui perbandingan antara polimerisasi radikal bebas
konvensional (CFRP) dan polimerassi transfer rantai adisi-fragmenasi secara
reversible (RAFT) Tiga tipe dari agen RAFT diantaranya asam pentanoat (4-
siano-4-fenilkarbonotioltio), 2-siano-2-propil dodesil tritiokarbonat, dan 2-siano-
2-propil benzoditioat. Ketiga macam agen RAFT tersebut telah diuji coba pada
polimerisasi awal dan bisa menghasilkan konversi tertinggi dari monomermonomer.
Agen transfer kontrol (CTA) dari golongan tritiokarbonat terpilih untuk
disintesis kemudian difungsionalisasi dengan succinimide..
Monomer-monomer stirena, N,N-dimetilaminoetil metakrilat (DMAEMA) and 2-
laktobionamidoetil metacrilat dipolimerisasi dengan teknik polimerisasi RAFT
menggunakan succinimid-CTA sebagai agen RAFT. Massa molar terkontrol dan
polidispersitas dar polimer-polimer fungsional dikarakterisasi menggunakan
kromatografi ekslusi ukuran (SEC).
Permukaan PET diaminolisis terlebih dahulu menggunakan polietilenimin (PEI)
dan 1,6-diaminoheksana sebelum proses grafting. Gugus-gugus amin yang
terdapat pada permukaan PET dikarakterisasi dengan pengukuran sudut kontak
dan spektroskopi fotoelektron X-ray (XPS). Penurunan sudut kontak terjadi antara
permukaan PET teraminolisis dan tetesan air (dari Ɵref = 64° ke Ɵ = 48°).
Grafting PS dan poli-LAMA sebagai polimer-polimer fungsional pada permukaan
PET teraminolisis dilakukan dengan teknik grafting-to. Perubahan sifat
permukaan setelah proses grafting dikarakterisasi dengan pengukuran sudut
kontak. Grafting PS pada permukaan PET teraminolisis menghasilkan
peningkatan sudut kontak (Ɵ = 63°) karena sifat hidrofobik. Di sisi lain, grafting
poli-LAMA pada permukaan PET teraminolisis menghasilkan penurunan sudut
kontak (Ɵ = 39°) karena sifat hidrofilik.
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Modification of PET surfaces with end-functionalized polymers prepared
from RAFT polymerization were investigated. Preliminary polymerizations of
styrene were prepared to establish the comparison of conventional free radical
polymerizations (CFRP) and reversible addition-fragmentation chain transfer
(RAFT) polymerizations. Three types of RAFT agents (4-cyano-4-
(phenylcarbonothioylthio) pentanoic acid (1), 2-cyano-2-propyl dodecyl
trithiocarbonate (2), and 2-cyano-2-propyl benzodithioate (3)) that could obtain
the highest conversion of monomers were investigated in the preliminary
polymerizations. Controlled transfer agent (CTA) from trithiocarbonate groups
were chosen to be synthesized then functionalized with succinimide groups.
Monomers of styrene (St), N,N-dimethylaminoethyl methacrylate (DMAEMA),
and 2-lactobionamidoethyl methacrylate (LAMA) were polymerized by RAFT
polymerization technique using succinimide-CTA (Suc-CTA) as RAFT agent.
The controlled molar masses and narrow polydispersities of end-functionalized
polymers were characterized by size exclusion chromatography (SEC). PET
surfaces were aminolized first by polyethylenimine (PEI) and 1,6-diaminohexane
before grafting process. The amine functions on PET surfaces were characterized
by contact angle measurements and X-ray photoelectron spectroscopy (XPS).
Decreasing of contact angle between aminolized PET surfaces and a droplet of
water occured (from Ɵref = 64° to Ɵ = 48°). Then grafting of PS and poly-LAMA
as end-functionalized polymers on aminolized PET surfaces were prepared by
“grafting-to” technique. The change of surface properties after grafting process
was characterized by contact angle measurements. Grafting of PS on aminolized
PET surfaces obtained the increasing of contact angle (Ɵ = 63°) because of their
hydrophobic properties. In otherwise, grafting of poly-LAMA on aminolized PET
surfaces obtained the decreasing of contact angle (Ɵ = 39°) because of their
hydrophilic properties.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTKi 547.280 Amo m |
| Uncontrolled Keywords: | PET, polimerisasi RAFT, Suc-CTA, polistirena, poli-DMAEMA, poli-LAMA, teknik grafting-to. |
| Subjects: | Q Science > QD Chemistry > Polymerization |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 21 Mar 2018 07:09 |
| Last Modified: | 24 Aug 2018 02:19 |
| URI: | http://repository.its.ac.id/id/eprint/51599 |
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