Thermoplastic vs Thermoset

Thermoplastic vs Thermoset

Hōʻike ka Thermoplastic i ka waiwai i hiki i kahi mea ke kahe a hoʻololi i ka wā i wela ai, a hiki ke mālama i kekahi ʻano ma hope o ka hoʻoilo. ʻO ka hapa nui o nā polymers linear e hōʻike ana i ka thermoplasticity a maʻalahi ke hana ʻia e ka extrusion, injection a i ʻole ka puhi ʻana. Hōʻike ka Thermosetting i ka waiwai ʻaʻole hiki ke hoʻoheheʻe ʻia a hoʻoheheʻe pinepine ʻia ke hoʻomehana ʻia, ʻaʻole hiki ke hoʻoheheʻe ʻia i loko o nā solvents. Loaʻa kēia waiwai i nā polymers nui.

He hoʻololi kemika. Ma hope o ka hoʻomehana ʻia, ua loli ka hale a lilo i mea ʻē aʻe. No ka laʻana, ʻaʻole hiki iā ʻoe ke hoʻihoʻi i ka hua ma hope o ka moʻa ʻana. ʻO ka Thermoplasticity kahi hoʻololi kino. Hoʻololi wale ke kūlana o ka mea i ka wā i wela ai, akā ʻaʻole loli ke ʻano. He kamaaina mau. No ka laʻana, ke hoʻoheheʻe ʻia ke kukui e ka wela, hiki ke hoʻihoʻi ʻia i ke kukui mua, akā ʻo ke ʻā ʻana o ke kukui he hoʻololi kemika.

1. Nā mea wela

Lilo ia i palupalu a wai ke hoʻomehana ʻia, a paʻakikī ke hoʻomaʻalili ʻia. Hiki ke hoʻohuli ʻia kēia kaʻina hana a hiki ke hana hou ʻia. Polyethylene, polypropylene , polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic plastic, nā polyolefins ʻē aʻe a me kā lākou copolymers, polysulfide, polyphenylene ether, chlorinated polyether, etc. He thermoplastic ia. ʻO nā kaulahao molekala resin i loko o nā thermoplastics he linear a lālā paha. ʻAʻohe pilina kemika ma waena o nā kaulahao molekala, a palupalu lākou a kahe i ka wā e hoʻomehana ʻia ai. ʻO ke kaʻina hana o ka hoʻomaʻalili ʻana a me ka paʻakikī he loli kino.

2. ʻO nā plastic thermosetting

I ka manawa mua e wela ai, hiki ke palupalu a kahe. Ke hoʻomehana ʻia i kahi mahana, hiki mai ka hopena kemika e hoʻopaʻa ʻia a paʻa. ʻAʻole hiki ke hoʻohuli ʻia kēia hoʻololi. Ma hope o ia mea, ke wela hou, ʻaʻole hiki ke lilo i palupalu a kahe. Ma muli o kēia ʻano e hana ʻia ai ke kaʻina hana, a hoʻohana ʻia ke kahe plasticized i ka wā o ka hoʻomehana mua e hoʻopiha ai i ka lua ma lalo o ke kaomi, a laila paʻa i kahi huahana o kahi ʻano a me ka nui. Kapa ʻia kēia mea he thermoset.

ʻO ka resin o nā plastic thermosetting linear a i ʻole lālā ma mua o ka hoʻōla ʻana. Ma hope o ka ho'ōla ʻana, hoʻokumu ʻia nā paʻa kemika ma waena o nā kaulahao molekala e hana i kahi ʻano pūnaewele ʻekolu-dimensional. ʻAʻole hiki ke hoʻoheheʻe hou ʻia, akā ʻaʻole hiki ke hoʻoheheʻe ʻia i nā solvents. ʻO Phenolic, aldehyde, melamine formaldehyde, epoxy, unsaturated polyester, silicone a me nā plastics ʻē aʻe he plastic thermosetting.

Thermoplastic vs Thermoset