Tambayoyi da Tattaunawa game da Nau'ikan Polymers
Polymer babban kwayar halitta ce da ta ƙunshi ƙananan raka'o'in ƙwayoyin halitta da ake kira monomers. Ana amfani da polymers a aikace-aikace iri-iri, tun daga robobi da roba zuwa zare na roba da kayan gini. Fahimtar polymers yana da mahimmanci a fannin sinadarai, kimiyyar kayan aiki, da masana'antu daban-daban. Wannan labarin zai tattauna misalai da yawa na matsaloli game da nau'ikan polymers kuma ya samar da mafita mai zurfi ga waɗannan matsalolin.
Tambayoyi da Tattaunawa Samfura
Tambaya ta 1:
Ka ambaci nau'ikan polymer guda uku bisa ga asalin tushensu kuma ka ba da misali na kowannensu.
Tattaunawa:
1. Sinadaran Halitta:
Sinadaran polymer na halitta polymers ne da ke faruwa a yanayi na halitta. Misalan polymers na halitta sun haɗa da:
– Cellulose: Ana samunsa a bangon ƙwayoyin shuka.
– Roba ta Halitta: An samo ta daga ruwan 'ya'yan itacen Hevea brasiliensis.
– Protein: Kamar collagen da ake samu a fata da kuma nama mai hade da dabbobi.
2. Sinadaran Sinadarai:
Sinadaran polymers na roba polymers ne da mutane ke samarwa ta hanyar amfani da sinadarai na wucin gadi. Misalan sinadaran polymers na roba sun haɗa da:
– Polyethylene (PE): Ana amfani da shi wajen kera jakunkunan filastik.
– Polypropylene (PP): Ana amfani da shi a masana'antar kera motoci da kuma marufin abinci.
– Polyvinyl Chloride (PVC): Ana amfani da shi wajen kera bututu da kebul.
3. Sinadaran Semi-roba:
Sinadaran polymers na Semi-synthetic gyare-gyare ne na polymers na halitta don inganta halayensu. Misalan polymers na Semi-synthetic sun haɗa da:
– Cellulose Acetate: An yi shi ne daga cellulose wanda aka gyara shi ta amfani da acetic acid, wanda ake amfani da shi a fim ɗin daukar hoto.
– Nitrocellulose: Ana samunsa ta hanyar nitration na cellulose, wanda ake amfani da shi wajen kera abubuwan fashewa da kuma shafa su.
Tambaya ta 2:
Bayyana bambanci tsakanin polymers na thermoplastic da na thermoset, kuma ka ba da misalai biyu na kowannensu.
Tattaunawa:
1. Polymers na Thermoplastic (Thermoplastics):
Wannan polymer yana laushi idan aka yi zafi kuma yana taurare idan aka sanyaya, kuma yana iya yin wannan aikin akai-akai. Wannan yana sauƙaƙa sake yin amfani da shi. Misali:
– Polyethylene (PE): Ana amfani da shi wajen kera jakunkunan filastik da kwalabe.
– Polystyrene (PS): Ana amfani da shi wajen kera kayan kariya da kuma marufin abinci.
2. Polymers masu saita zafi (Thermosets):
Waɗannan polymers, da zarar an samar da su ta hanyar dumama da sanyaya, ba za a iya sake narke su ba. Suna da tsari mai ƙarfi kuma ba za a iya sake yin amfani da su ta hanyar da thermoplastics ba. Misali:
– Bakelite: Ana samunsa a cikin makullan lantarki da makullan kayan girki.
– Epoxy: Ana amfani da shi a cikin manne, shafa, da kuma haɗakar da ke ɗorewa.
Tambaya ta 3:
Bayyana tsarin ƙara polymerization kuma bayar da misalan polymers da aka samar ta wannan tsari.
Tattaunawa:
Ƙara polymerization shine tsarin samar da polymers ta hanyar sarkar amsawa inda monomers waɗanda ke ɗauke da haɗin gwiwa biyu (yawanci haɗin gwiwa biyu na carbon-carbon) ke haɗuwa ba tare da samar da samfuran da suka lalace ba.
Bugu da ƙari, ƙarin matakan polymerization sun haɗa da:
1. Farawa: Samar da free radicals ko ions waɗanda ke fara amsawar.
2. Yaɗuwa: Free radicals ko ions suna amsawa da monomers, suna samar da dogon sarƙoƙi na polymer.
3. Karewa: Amsar ta ƙare ne lokacin da aka haɗu da free radicals guda biyu.
Misalan ƙarin polymers:
– Polyethylene (PE): An samar da shi daga ethylene monomer (C2H4).
– Polypropylene (PP): An samar da shi daga propylene monomer (C3H6).
Tambaya ta 4:
Me ake nufi da polymerization na condensation kuma bayar da misalai biyu na polymers da aka samar ta wannan tsari.
Tattaunawa:
Tsarin polymerization na condensation tsari ne na polymerization wanda monomers ke haɗuwa ta hanyar cire ƙananan ƙwayoyin halitta kamar ruwa ko methanol.
Misalan polymerization na condensation sune:
1. Tsarin Nailan:
Ana samar da nailan 6,6 ta hanyar amsawar hexamethylenediamine da adipic acid, wanda ke samar da ruwa a matsayin wani abu da zai maye gurbinsa.
\[ \rubutu {H}_2\rubutu{N}-(\rubutu{CH}_2)_6\rubutu{NH}_2 + \rubutu{HOOC}-(\rubutu{CH}_2)_4\rubutu{COOH} (-\rubutu{NH}-(\rubutu{CH}_2)_6\rubutu{NH-CO}-(\rubutu{CH}_2)_4\rubutu{CO-})_n + \rubutu{H}_2\rubutu{O} \]
2. Tsarin Polyester:
Ana samar da polyesters kamar polyethylene terephthalate (PET) ta hanyar amsawar da ke tsakanin terephthalic acid da ethylene glycol, suna samar da ruwa a matsayin samfurin da ya rage.
\[ \rubutu{HOOC-}\rubutu{C}_6\rubutu{H}_4\rubutu{COOH} + \rubutu{HO-CH}_2\rubutu{CH}_2\rubutu{OH} \rubutu{OH} (-\rubutu{O-CH}_2\rubutu{CH}_2-\rubutu{OCO-}\rubutu{C}_6\rubutu{H}_4\rubutu{CO-})_n + \rubutu{H}_2\rubutu{O} \]
Tambaya ta 5:
Ta yaya za a iya canza halayen polymer ta hanyar amfani da na'urorin plasticizers? Ba da misali.
Tattaunawa:
Masu ƙara filastik ana ƙara su ne a cikin polymers don ƙara sassauci, rage karyewa, da kuma rage zafin canjin gilashi (Tg). Masu ƙara filastik suna aiki ta hanyar rage ƙarfin haɗin tsakanin molecular a cikin polymer, suna ba da damar sarƙoƙin polymer su motsa cikin 'yanci da kuma ƙara ƙarfin kayan.
Misalan amfani da filastik:
– PVC da na'urorin plasticizers: A fannin kera kebul na lantarki, ana haɗa PVC da na'urorin plasticizers kamar phthalates don sa ya zama mai sassauƙa da dorewa.
– Cellulose acetate da plasticizers: Ana amfani da su wajen samar da fina-finai da lacquer don rage tauri a kayayyakin.
Kammalawa
Polymers kayan aiki ne masu matuƙar amfani waɗanda ke taka muhimmiyar rawa a rayuwar yau da kullun da fasahar zamani. Ta hanyar fahimtar nau'ikan polymer da hanyoyin polymerization, za mu iya haɓaka sabbin kayan aiki masu kyawawan halaye da haɓaka aikace-aikacensu a fannoni daban-daban. Ilimin polymer yana farawa da magance waɗannan batutuwa da kuma samun zurfin fahimtar ƙa'idodi na asali waɗanda ke ƙarƙashin kimiyyar polymer. Wannan labarin yana da nufin samar da fahimtar farko game da nau'ikan polymer da kuma ƙarfafa masu karatu su ci gaba da koyo da bincike sosai game da polymers da aikace-aikacensu.
