nkhani

Chlorinated polyvinyl chloride (CPVC) ndi zinthu za polima zomwe zimapezedwa pambuyo pothiridwanso kwa PVC.Zomwe thupi ndi mankhwala zimasintha kwambiri: ndi kuwonjezeka kwa klorini, kusakhazikika kwa unyolo wa maselo kumawonjezeka ndipo crystallinity imachepa;polarity ya unyolo wa maselo ukuwonjezeka, mphamvu ya intermolecular imawonjezeka, kutentha kwa kutentha kumawonjezeka kwambiri, ndipo mphamvu zamakina zimakula.

CPVC ndiyabwino kwambiri kuposa PVC pakukana nyengo, kukana kukalamba komanso kuletsa moto.Mwachitsanzo, pambuyo pa chlorine, malire a oxygen index ya PVC adzakwera kuchokera ku 45 ~ 49 mpaka> 70 (yokhala ndi 67% CPVC chlorine), ndipo kuchuluka kwa utsi ndi mpweya wotsalira mu lawi zidzachepetsedwa kwambiri.Njira yopangira chlorine idakhudzanso zinthu zomwe zimapangidwa.Mlingo wa klorini wa PVC ukhoza kufika 73% pambuyo pothiridwa.

Nthawi zambiri ndi madzi gawo kuyimitsidwa ndondomeko, pambuyo kusakaniza PVC utomoni, ndi chlorination, kusefera, kutsuka, CPVC kupanga neutralization, kuyanika ndondomeko watha, khalidwe la PVC ufa zinthu mtengo kusankha n'kofunika kwambiri, makamaka zimakhudza Machining bata, bata matenthedwe) , kusankha PVC utomoni yaiwisi yaiwisi lotayirira, zikopa monga woonda monga nkotheka, dongosolo laukhondo digiri zabwino.Chlorine wamba ndi 63% ~ 67%.Kukana kwake kwa nyengo, kukana kwa dzimbiri, kukana kukalamba komanso kuyaka kodziwikiratu komwe kumapangitsa kuti moto ukhale wabwino kwambiri kuposa utomoni wamba wa PVC.The klorini okhutira kumawonjezeka, kotero vica softening mfundo kutentha kwambiri kuchuluka, 35 ℃ apamwamba kuposa PVC utomoni, apamwamba kutentha zosagwira kutentha mpaka 130 ℃, oyenera kutentha kusamva mipope ndi zovekera ndi mbale (monga mipope madzi otentha, mfundo, kutentha kusamva zida zamagetsi ndi thanki yosungirako).

UPVC ndi PVC yolimba.Zinthu zosinthidwa zimakonzedwa powonjezera zina zowonjezera zosinthidwa pamaziko a ufa wa mtengo wa PVC."U" ndi Unplasticized (Unplasticized), kotero kusiyana kwakukulu pakati pa UPVC ndi PVC ndi PVC yofewa ndikuti palibe plasticizer yomwe imawonjezeredwa, ufa wochuluka wa calcium, mphamvu yapamwamba yamakina azinthu, yoyenera kupanga ma valve ndi mapaipi.

CPVC ndi chlorinated polyvinyl chloride.Zochokera PVC utomoni, CPVC kumawonjezera klorini zili PVC zakuthupi ndi ndondomeko, zambiri kuyambira 63 mpaka 69%, kuti patsogolo kutentha kukana, asidi, zamchere, mchere ndi oxidant dzimbiri za zinthu, ndi kusintha matenthedwe kukana. mapindikidwe kutentha ndi makina katundu wa zinthu.

CPVC imawonjezera chlorine mu utomoni wa PVC pogwiritsa ntchito njira zama mankhwala, motero mtengo wazinthu za CPVC utomoni ndi wokwera.M'kupita kwanthawi, zida zina zosinthidwa ziyenera kuyikidwa pa jakisoni wazinthu kapena kutulutsa, zomwe zimapangitsa kuti pakhale mtengo wokwera wa zida zosinthidwa za CPVC.Mtengo wogulitsa wa tinthu tating'ono ta CPVC ku China nthawi zambiri umaposa 20,000 / ton.

Chifukwa cha kukwera mtengo kwa CPVC, ndizosatheka kuti nkhaniyi igwiritsidwe ntchito mochuluka ngati UPVC.Pakalipano, CPVC imagwiritsidwa ntchito makamaka pamapaipi ozimitsa moto, mapaipi osagwirizana ndi mankhwala komanso mapaipi amadzi otentha.