Nā huahana

Hiki i ka huahana ke hoʻomaka maikaʻi i ka polymerization i ka haʻahaʻa haʻahaʻa a me ka haʻahaʻa haʻahaʻa e hoʻohua ai i ka polymer kiʻekiʻe linear a me ke kaumaha molecular kiʻekiʻe.

He kiʻekiʻe ka hoʻomaka ʻana o ka mea hoʻomaka Va-044, ʻoi aku ka kiʻekiʻe o ke kaumaha molecular, ka wai hoʻoheheʻe maikaʻi a me ke koena liʻiliʻi.

Loaʻa ka mea hoʻomaka VA-044 ma ka hoʻokomo ʻana i nā pūʻulu hydrophilic i loko o ka mole o nā mea hoʻomaka azonitrile, a loaʻa iā ia ka solubility wai maikaʻi.No laila, kūpono ka mea hoʻomaka VA-044 no ka polymerization solution aqueous a me ka polymerization emulsion o ka polymer synthesis.Hoʻohālikelike ʻia me nā ʻano maʻamau o nā mea hoʻomaka azo, loaʻa i ka VA-044 ka mea hoʻomaka i ka pono hoʻomaka kiʻekiʻe, kiʻekiʻe kiʻekiʻe ka nui o ka molekala pili, ka hoʻoheheʻe wai maikaʻi, a me ka liʻiliʻi o ke kino koena.Ke hoʻohālikelike ʻia me ka inorganic persulfate a me nā mea hoʻomaka wai-soluble ʻē aʻe, hiki i ka mea hoʻomaka VA-044 ke hoʻokō i ka hopena decomposition maʻemaʻe, kūpaʻa a hiki ke hoʻopaʻa ʻia e hana i ka linearity kiʻekiʻe a me nā polymers kaumaha molecular kiʻekiʻe.

ʻAʻole like me nā huahana azo nitrile, no ka mea ʻaʻole i loko o nā pūʻulu cyano, nā huahana decomposition o VA-044 initiator ʻaʻohe mea ʻona.I ka manawa like, ʻoi aku ka decomposes ma mua o nā mea hoʻomaka ʻē aʻe, ʻoi aku ka kiʻekiʻe o ka hoʻololi ʻana, ʻaʻohe koena a i ʻole agglomeration i ka wā o ka hana polymerization.Hiki iā ia ke hoʻomaka maikaʻi i ka polymerization ma ka haʻahaʻa haʻahaʻa a me ka haʻahaʻa haʻahaʻa e hana i ka linearity kiʻekiʻe a me nā polymers kaumaha molecular kiʻekiʻe.No laila, hoʻohana nui ʻia ka mea hoʻomaka VA-044 i ka polymerization aqueous solution a me ka emulsion polymerization o ka polymer synthesis, e like me ka monomer acrylamide polymerization, Initiator no ka polymerization reactions e like me ka styrene emulsion polymerization a me ka monomer polymerization o styrene a me butyl acrylate.