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Methyl Methacrylate Syrup: Partly Polymerised below 80 °C with Hydrogen Peroxide
Charlie

Dicipta oleh

Charlie

20. Oktober 2026DE
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Methyl Methacrylate Syrup: Partly Polymerised below 80 °C with Hydrogen Peroxide

Methyl methacrylate syrup is the monomer partly polymerised until it is thick: the stock that is poured between glass plates to cast acrylic sheet. ICI's Tattersall (US 2,071,907, 1937) heats the liquid monomer with a little catalyst, never above 80 °C, until it is syrupy, then cools it. His example used benzoyl peroxide and he names hydrogen peroxide as an alternative but gives no amount. Our choice: 14 g of 3 % hydrogen peroxide per kg of monomer, as many peroxide molecules as his 0.3 % benzoyl peroxide. Methyl methacrylate is flammable: no open flame. The picture: our diagram.
Pertengahan
Half a day

Arahan

1

Weigh monomer and peroxide

Weigh liquid methyl methacrylate into a round-bottom flask and add 14 g of 3 % hydrogen peroxide per kg of monomer (our amount; the patent only says a relatively small amount).

Bahan untuk langkah ini:

Metil MetakrilatMetil Metakrilat1 kg
Hidrogen peroksida (3 %)Hidrogen peroksida (3 %)14 g

Alatan diperlukan:

Kelalang dasar bulatKelalang dasar bulat
Neraca dua piringNeraca dua piring
Gogal Percikan KimiaGogal Percikan Kimia
Sarung tangan getahSarung tangan getah
Kabinet wasap (bersalur)Kabinet wasap (bersalur)
2

Heat, never above 80 °C

Fit a reflux condenser and warm the flask in a water bath to near but not above 80 °C. Above 80 °C the finished sheet is not flawless; lower temperatures work but take longer.

Alatan diperlukan:

Kelalang dasar bulatKelalang dasar bulat
Kondenser RefluksKondenser Refluks
Mandian AirMandian Air
Plat PemanasPlat Pemanas
Termometer MakmalTermometer Makmal
Kabinet wasap (bersalur)Kabinet wasap (bersalur)
3

Stop when it is syrupy

Check the thickness now and then with a glass rod. Stop when the liquid has become a syrup. The patent took its example to a molecular weight of 3000, measured by viscosity, and gives no time.

Alatan diperlukan:

Rod Pengacau KacaRod Pengacau Kaca
Termometer MakmalTermometer Makmal
4

Cool to room temperature

Cool the syrup to about room temperature (30 °C in the example) in cold water. It is then ready to pour between glass plates and cast into sheet.

Alatan diperlukan:

Rendaman penyejuk airRendaman penyejuk air
Termometer MakmalTermometer Makmal
Sarung tangan getahSarung tangan getah

Bahan

2

Alatan Diperlukan

11

CC0 Domain Awam

Blueprint ini dikeluarkan di bawah CC0. Anda bebas menyalin, mengubah, mengedar, dan menggunakan karya ini untuk sebarang tujuan, tanpa meminta kebenaran.

Sokong Pembuat dengan membeli produk melalui Blueprint mereka di mana mereka memperoleh Komisen Pembuat ditetapkan oleh Penjual, atau cipta iterasi baru Blueprint ini dan sertakan ia sebagai sambungan dalam Blueprint anda sendiri untuk berkongsi hasil.

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