Plasticizers muCoating Formulations
Plastiki anoshandiswa kudzora magadzirirwo emufirimu ekugadzira machira anoenderana nekuomesa firimu kugadzira zvinhu. Kuumbwa kwakakodzera kwemafirimu kwakakosha kuitira kuti isangane nezvido pane zvakati zvekuvharisa zvimiro zvakaita seyakaoma firimu kutaridzika, substrate adhesion, elasticity, pamwe nehupamhi hwekuoma panguva imwe chete.
Plasticizers anoshanda nekudzikisa tembiricha yekugadzira firimu uye elasticize coating; Plasticizers anoshanda nekuzvipinza pakati pecheni dzemapolymers, achiaparadzanisa (kuwedzera "yemahara vhoriyamu"), uye nekudaro zvakanyanya kudzikisa tembiricha yegirazi yepolymer uye kuita kuti ipfave.
Mamorekuru ari mupolymeric firimu rekugadzira zvinhu, senge nitrocellulose (NC), anowanzo kuratidza yakaderera cheni kufamba, inotsanangurwa nekusangana kwakasimba kwema molecular (inotsanangurwa nevan der Waals forces) emacheni epolymer. Basa replasticizer nderokudzikisa kana kudzivirira zvachose kuumbwa kwezvisungo zvakadaro. Kana ari ma polymers ekugadzira izvi zvinogona kuwanikwa nekubatanidza elasticizing zvikamu kana monomers izvo zvinodzivirira zvakanyanya kupindirana kwema molecular; iyi makemikari ekugadzirisa maitiro anozivikanwa se "inner plasticization". For natural zvigadzirwa kana mapolymer akaoma ekugadzirisa kwakashata, sarudzo ndeyekunze kushandisa plasticizers mukugadzirisa kwekuputira
Plasticizers anodyidzana panyama nepolymer binder molecule, isina kemikari kuita uye inoumba homogeneous system. Kudyidzana kunobva pane chaiyo chimiro cheplasticizer, kazhinji ine polar uye isiri-polar moieties, uye inoguma nekudzikisa tembiricha yegirazi (Tg). Kuti uve nechokwadi chekushanda kwepamusoro, iyo plasticizer inofanirwa kukwanisa kupinda muresin pamamiriro ekugadzira firimu.
Classic plastizers yakaderera molecular uremu zvinhu, senge phthalate esters. Nekudaro, nguva pfupi yadarika zvigadzirwa zvemahara zvephthalate zvinosarudzwa sezvo kushandiswa kwephthalate esters kunorambidzwa nekuda kwekunetsekana kwekuchengetedza chigadzirwa.