ﺑﺮرﺳﯽ اﺛﺮ ﺳﺎزﮔﺎرﮐﻨﻨﺪﮔﯽ ﭘﻠﯽﭘﺮوﭘﯿﻠﻦ اﮐﺴﯿﺪﺷﺪه در ﻓﺎز ﻣﺬاب ﺑﺮ ﺧﻮاص ﻣﮑﺎﻧﯿﮑﯽ، ﻓﯿﺰﯾﮑﯽ و رﯾﺨﺖﺷﻨﺎﺳﯽ ﭼﻨﺪﺳﺎزه ﺣﺎﺻﻞ از آرد ﮔﯿﺎه ﻧﯽ-ﭘﻠﯽاﺗﯿﻠﻦ ﺳﻨﮕﯿﻦ

Investigation of the effect of compatibilization of oxidized polypropylene in molten phase on the mechanical, physical, and morphological properties of reed plant flour-high density polyethylene composite

اﯾﻦ ﺗﺤﻘﯿﻖ ﺑﺎ ﻫﺪف ﺑﺮرﺳﯽ اﻣﮑﺎن ﺳﺎﺧﺖ ﭼﻨﺪﺳﺎزه اﻟﯿﺎف ﻧﯽ-ﭘﻠﯽاﺗﯿﻠﻦ ﺳﻨﮕﯿﻦ ﺑﺎ اﺳﺘﻔﺎده از ﭘﻠﯽﭘﺮوﭘﯿﻠﻦ اﮐﺴﯿﺪ ﺷﺪه ﺑﻪ ﻋﻨﻮان ﺳﺎزﮔﺎرﮐﻨﻨﺪه اﻧﺠﺎم ﮔﺮدﯾﺪ. ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر آرد ﮔﯿﺎه ﻧﯽ، ﭘﻠﯽاﺗﯿﻠﻦ ﺳﻨﮕﯿﻦ و ﺳﺎزﮔﺎرﮐﻨﻨﺪه ﭘﻠﯽﭘﺮوﭘﯿﻠﻦ اﮐﺴﯿﺪ ﺷﺪه ﺑﻪ ﻣﻘﺪار ﺗﻌﯿﯿﻦ ﺷﺪه در داﺧﻞ دﺳﺘﮕﺎه ﻣﺨﻠﻮطﮐﻦ داﺧﻠﯽ ﺑﻪ ﻣﺪت 6 دﻗﯿﻘﻪ ﻣﺨﻠﻮط ﺷﺪﻧﺪ و ﭘﺲ از آن ﻣﺎده ﺑﯽﺷﮑﻞ ﺑﻪدﺳﺖ آﻣﺪه ﺗﻮﺳﻂ آﺳﯿﺎب آزﻣﺎﯾﺸﮕﺎﻫﯽ ﺑﻪ ﮔﺮاﻧﻮل ﺗﺒﺪﯾﻞ ﺷﺪ. در ﻧﻬﺎﯾﺖ ﮔﺮاﻧﻮلﻫﺎ ﺗﻮﺳﻂ ﭘﺮس ﮔﺮم ﺑﻪ ﺻﻔﺤﺎت اﻟﯿﺎف ﻧﯽ-ﭘﻼﺳﺘﯿﮏ ﺗﺒﺪﯾﻞ ﺷﺪﻧﺪ. آزﻣﻮنﻫﺎي ﻣﮑﺎﻧﯿﮑﯽ ﺷﺎﻣﻞ ﻣﻘﺎوﻣﺖﻫﺎي ﺧﻤﺸﯽ و ﮐﺸﺸﯽ و ﻣﺪولﻫﺎي اﻻﺳﺘﯿﺴﯿﺘﻪ ﺧﻤﺸﯽ و ﮐﺸﺸﯽ و ﺧﻮاص ﻓﯿﺰﯾﮑﯽ ﺷﺎﻣﻞ ﺟﺬب آب و واﮐﺸﯿﺪﮔﯽ ﺿﺨﺎﻣﺖ 2 و 24 ﺳﺎﻋﺖ ﺑﻮدﻧﺪ. ﺑﺮاي ﺑﺮرﺳﯽ ﻣﯿﺰان اﺻﻼح ﭘﺮوﭘﯿﻠﻦ اﮐﺴﯿﺪ ﺷﺪه از دﺳﺘﮕﺎه ﻃﯿﻒﺳﻨﺠﯽ ﻣﺎدون ﻗﺮﻣﺰ و ﺑﺮاي ﻣﻄﺎﻟﻌﻪ رﯾﺨﺖﺷﻨﺎﺳﯽ ﭼﻨﺪﺳﺎزهﻫﺎ از ﺗﺼﺎوﯾﺮ ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ ﺑﺎ اﻓﺰاﯾﺶ ﻣﺎده ﺳﺎزﮔﺎرﮐﻨﻨﺪه ﺧﻮاص ﻣﮑﺎﻧﯿﮑﯽ ﺑﻪ ﺻﻮرت ﺧﻄﯽ اﻓﺰاﯾﺶ ﯾﺎﻓﺘﻪ، در ﺣﺎﻟﯽ ﮐﻪ ﺟﺬب آب و واﮐﺸﯿﺪﮔﯽ ﺿﺨﺎﻣﺖ ﮐﺎﻫﺶ ﯾﺎﻓﺘﻨﺪ. ﺗﺼﺎوﯾﺮ ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ ﺣﺎﮐﯽ از ﺑﻬﺒﻮد ﭼﺴﺒﻨﺪﮔﯽ در ﻓﺼﻞ ﻣﺸﺘﺮك ﺑﯿﻦ اﻟﯿﺎف ﻧﯽ و ﭘﻠﯿﻤﺮ ﺑﻮد. ﻃﯿﻒﺳﻨﺠﯽ ﻣﺎدون ﻗﺮﻣﺰ ﻧﯿﺰ ﻧﺸﺎن داد ﮐﻪ در اﺛﺮ اﮐﺴﯿﺪاﺳﯿﻮن ﭘﻠﯽﭘﺮوﭘﯿﻠﻦ، ﻧﻮاﺣﯽ آﺑﺪوﺳﺖ در آن ﺗﺸﮑﯿﻞ ﺷﺪه اﺳﺖ.

This study aimed to investigate the possibility of making reed plant flour-high density polyethylene composite using oxidized poly-propylene as a compatibilizer. For this purpose, reed plant flour, high density polyethylene, and oxidized poly-propylene compatibilizer in the specified value were mixed into the internal mixer for 6 min and after that, the resulting amorphous materials turned to the granules using a laboratory mill. Finally, the granules turned to reed-plastic plates using a hot press. Mechanical tests such as bending and tensile resistances and their modulus and physical properties such as water absorption and thickness swelling in 2 and 24 h were measured. A fourier transform infrared spectroscopy machine was used to check the modification of oxidized poly-propylene and the morphology of the composites was studied by electron microscopy images. The results demonstrated that with increasing the compatibilizer, the mechanical properties were linearly increased, while the water absorption and thickness swelling were decreased. Electron microscopy images showed that improved adhesion at the interface between the reed plant flour and polymer fibers. The Fourier-transform infrared spectroscopy also showed that due to the oxidation of polypropylene, hydrophilic regions are formed in it.