Polypropylene homopolymer (PPH) yog ib hom thermoplastic polymer uas tau siv dav hauv ntau lub lag luam vim nws cov khoom zoo heev xws li tshuaj lom neeg tsis kam, tsis tshua muaj siab, thiab zoo thermal stability. Tsis tas li ntawd, PPH tseem paub txog nws lub peev xwm tiv taus qhov kub thiab txias.
Qhov kub ntawm PPH sib txawv nyob ntawm seb cov ntawv thov tshwj xeeb thiab cov xwm txheej uas nws siv. Feem ntau, PPH tuaj yeem tiv taus qhov kub ntawm -20 degree mus rau 110 degree yam tsis muaj kev puas tsuaj loj lossis hloov pauv ntawm nws lub cev. Txawm li cas los xij, qee qib ntawm PPH tuaj yeem tiv taus qhov kub thiab txias txog li 120 degree.
PPH muaj lub siab melting point ntawm ib ncig ntawm 160 degree, uas txhais tau hais tias nws tsis pib mos kom txog thaum nws ncav cuag qhov kub thiab txias. Cov cuab yeej no ua rau PPH yog cov khoom siv zoo tshaj plaws rau kev siv kub kub xws li cov kav dej kub thiab cov khoom siv tsheb. Tsis tas li ntawd, PPH tseem tuaj yeem tswj hwm nws cov khoom siv dag zog thaum muaj dej kub lossis chav dej, ua rau nws yog ib qho khoom siv tsim nyog rau kev siv hauv kev lag luam khoom noj thiab dej haus.
Ib qho txiaj ntsig tseem ceeb ntawm PPH yog nws cov tshuaj tiv thaiv zoo rau feem ntau cov tshuaj, suav nrog cov kua qaub, alkalis, thiab cov kuab tshuaj organic, ua rau nws yog cov khoom siv zoo tshaj plaws rau cov khoom siv tshuaj, cov khoom siv hauv chav kuaj, thiab lwm yam kev siv tshuaj lom neeg. Ntawm qhov kub thiab txias, PPH tseem tuav nws cov tshuaj tiv thaiv, ua rau nws cov khoom siv txhim khu kev qha rau kev siv tshuaj lom neeg nruj heev.
Sib nrug los ntawm nws qhov kub thiab txias thiab tshuaj tiv thaiv, PPH tseem paub txog nws cov khoom hluav taws xob zoo, uas ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev siv hluav taws xob thiab cov khoom siv hluav taws xob. Tsis zoo li lwm cov polymers, PPH tsis nqus dej noo, uas tuaj yeem cuam tshuam rau nws cov khoom siv hluav taws xob, txawm tias raug cov av noo siab.
Hais txog nws cov khoom siv kho tshuab, PPH yog cov khoom siv tawv thiab tawv nrog lub zog tensile siab thiab cuam tshuam. PPH tuaj yeem tiv taus rov qab khoov thiab flexing yam tsis muaj kev tawg lossis tawg, ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev siv hauv cov pob khawm yas thiab lwm yam hloov tau yooj yim.
Hauv cov ntsiab lus
Qhov ntsuas kub ntawm PPH yog qhov dav thiab sib txawv nyob ntawm qhov tshwj xeeb daim ntawv thov thiab siv cov xwm txheej. Txawm li cas los xij, feem ntau, PPH tuaj yeem tiv taus qhov kub ntawm -20 degree mus rau 110 degree yam tsis muaj qhov cuam tshuam loj ntawm nws lub cev. Cov khoom zoo heev ntawm PPH, suav nrog nws qhov kub thiab txias thiab tshuaj tiv thaiv, cov khoom siv hluav taws xob zoo, thiab lub zog siv tshuab, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev siv ntau yam kev siv thoob plaws ntau yam lag luam, los ntawm kev ua tshuaj lom neeg mus rau hluav taws xob engineering thiab tsheb.