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<p>polymerization parameters ( and ) and polymerization temperature:</p>

<p>Polymerization is possible only when . Eventually, at or above the so-called <a href="page.php?w=ceiling_temperature">ceiling temperature</a> , at which , formation of the high polymer does not occur. </p>

<p>For example, <a href="page.php?w=tetrahydrofuran">tetrahydrofuran</a> (THF) cannot be polymerized above &nbsp;=&nbsp;84&nbsp;°C, nor cyclo-octasulfur (S<sub>8</sub>) below &nbsp;=&nbsp;159&nbsp;°C.  However, for many monomers,  and , for polymerization in the bulk,</p><p>
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