Hoʻopili nā plastik i nā mea i haku mua ʻia me nā resins (a i ʻole nā monomers polymerized pololei i ka wā o ka hana ʻana), hoʻohui ʻia me nā mea hoʻohui e like me nā plasticizers, fillers, lubricants, a me nā kala, hiki ke hoʻoheheʻe ʻia i ke ʻano i ka wā e hana ai.
ʻO nā hiʻohiʻona nui o nā plastik:
① ʻO ka hapa nui o nā plastics he māmā a paʻa kemika, kūpaʻa i ka ʻino.
② Ka hopena maikaʻi loa.
③ Maikaʻi maikaʻi a ʻaʻahu kūʻē.
④ Nā waiwai hoʻokaʻawale me ka haʻahaʻa haʻahaʻa haʻahaʻa.
⑤ He mea maʻalahi ke hoʻoheheʻe, kala, a me ka hana ʻana ma ke kumu kūʻai haʻahaʻa.
⑥ ʻAʻole maikaʻi ke kūpaʻa wela o ka hapa nui o nā plastik, hoʻonui ʻia ka wela, a hiki ke puhi ʻia.
⑦ ʻAʻole i hoʻopaʻa ʻia ka dimensional, prone i ka deformation.
⑧ He nui nā plastics e hōʻike ana i ka hana haʻahaʻa haʻahaʻa haʻahaʻa, e lilo ana i palupalu i nā kūlana anu.
⑨ Hiki i ka ʻelemakule.
⑩ Hoʻoheheʻe maʻalahi kekahi mau plastic i loko o nā mea hoʻoheheʻe.
Phenolic resinshoʻohana nui ʻia i nā noi FRP (Fiber-Reinforced Plastic) e koi ana i nā waiwai FST (Fire, Smoke, and Toxicity). ʻOiai kekahi mau palena (ʻoi aku ka brittleness), noho mau nā resins phenolic i kahi ʻāpana nui o nā resins kalepa, me ka hana makahiki honua o kahi kokoke i 6 miliona mau tona. Hāʻawi ka Phenolic resins i ke kūpaʻa dimensional maikaʻi loa a me ke kūpaʻa kemika, e mālama ana i ka paʻa i loko o kahi pae wela o 150-180°C. ʻO kēia mau waiwai, i hui pū ʻia me kā lākou uku-hana hoʻokō, hoʻokele i kā lākou hoʻohana mau ʻana i nā huahana FRP. ʻO nā noi maʻamau e pili ana i nā ʻāpana o loko o ka mokulele, nā laina ukana, nā kaʻa kaʻa i loko o ke kaʻa, nā pae ʻaila ʻaila a me nā paipu, nā mea tunnel, nā mea friction, rocket nozzle insulation, a me nā huahana pili FST.
Nā ʻano o nā Hui Phenolic i hoʻoikaika ʻia i ka fiber
ʻO nā phenolic composites i hoʻoikaika ʻia i ka fibere hoʻokomo i nā mea i hoʻonui ʻia me ka ʻokiʻoki ʻia, nā lole, a me nā fiber mau. Hoʻohana mau ʻia nā fiber i ʻoki mua ʻia (e laʻa, lāʻau, cellulose) i loko o nā pūhui hoʻoheheʻe phenolic no nā noi like ʻole, ʻoi aku ka nui o nā ʻāpana kaʻa e like me nā uhi wai a me nā ʻāpana friction. Hoʻohui ʻia nā pūhui hoʻoheheʻe phenolic hou i nā fiber aniani, nā fiber metala, a i ʻole nā mea hou aku, nā fiber carbon. ʻO nā resins phenolic i hoʻohana ʻia i ka hoʻoheheʻe ʻana he mau resins novolac, hoʻōla ʻia me ka hexamethylenetetramine.
Hoʻohana ʻia nā mea lole lole mua i hoʻohana ʻia i nā noi like ʻole, e like me RTM (Resin Transfer Moulding), nā hale honeycomb sandwich, pale ballistic, nā panela loko o ka mokulele, a me nā laina ukana. Hoʻokumu ʻia nā huahana hoʻomau fiber-reinforced ma o ka filament winding a i ʻole pultrusion. Ka lole a maunā mea hoʻohui i hoʻoikaika ʻia i ka fiberhoʻohana maʻamau i ka wai- a i ʻole ka solvent-soluble resole resins phenolic. Ma waho aʻe o ka resole phenolics, nā ʻōnaehana phenolic e pili ana-e like me benzoxazines, cyanate esters, a me ka resin Calidur™ hou i kūkulu ʻia-ua hoʻohana pū ʻia ma FRP.
ʻO Benzoxazine kahi ʻano hou o ka resin phenolic. ʻAʻole like me nā phenolics kuʻuna, kahi e hoʻopili ʻia ai nā ʻāpana molekala ma o nā alahaka methylene [-CH₂-], hana ʻia nā benzoxazines i kahi hanana cyclic. Hoʻopili maʻalahi ʻia nā Benzoxazines mai nā mea phenolic (bisphenol a i ʻole novolac), nā amine mua, a me ka formaldehyde. ʻAʻole hoʻohua ʻia kā lākou polymerization wehe ʻana i ke apo i nā huahana a i ʻole nā volatiles, e hoʻonui ana i ke kūpaʻa dimensional o ka huahana hope. Ma waho aʻe o ka wela kiʻekiʻe a me ka pale ahi, hōʻike nā resins benzoxazine i nā waiwai i loaʻa ʻole i nā phenolics kuʻuna, e like me ka haʻahaʻa haʻahaʻa haʻahaʻa a me ka hana dielectric paʻa.
ʻO Calidur ™ he hanauna hou, hoʻokahi-component, lumi-memperature-stable polyarylether amide thermosetting resin i hoʻomohala ʻia e Evonik Degussa no nā ʻoihana aerospace a me nā ʻoihana uila. Ho'ōla kēia resini ma 140°C i loko o 2 mau hola, me ka mahana hoʻololi aniani (Tg) o 195°C. I kēia manawa, hōʻike ʻo Calidur ™ i nā pono he nui no nā composites hana kiʻekiʻe: ʻaʻohe emissions volatile, ka hopena exothermic haʻahaʻa a me ka hoʻohaʻahaʻa ʻana i ka wā o ka hoʻōla ʻana, kiʻekiʻe wela a me ka ikaika pulu, ʻoi aku ka maikaʻi o ka composite composite a me ka ikaika shear, a me ka paʻakikī maikaʻi loa. Hoʻohana ʻia kēia resin hou ma ke ʻano he kumu kūʻai kūpono i ka mid-to-high-Tg epoxy, bismaleimide, a me ka cyanate ester resins i ka aerospace, ka halihali, kaʻa, uila / uila, a me nā noi koi ʻē aʻe.
Ka manawa hoʻouna: Iune-24-2025
