Ọganihu ọhụrụ na ihe ndị dị na polyurethane maka mmezi ngwa ngwa

Mmepe nke ihe ndị polymer nwere ike ịgwọ onwe ya, nke mere na ihe ndị mebiri emebi nwere ike ịgwọ onwe ya nke ọma na ịmaliteghachi, bụ otu n'ime ụzọ isi belata "mmetọ ọcha". Otú ọ dị, ọ na-esiri ike ịghọta n'ime ụlọ okpomọkụ onwe-mmezi nke enyo polymers n'ihi na nke elu njupụta nke molekụla stacking na oyi kpọnwụrụ netwọk nke molekul yinye ije. Ọ bụ ezie na e meela ihe ịga nke ọma na glassy onwe-agwọ ọrịa polymer ihe n'ime afọ ndị na-adịbeghị anya, ndị dị ala n'ibu Njirimara, mgbagwoju nrụzi ụzọ na ogologo oge nrụzi na-eme ka o siri ike na-etinyere n'ọrụ. Ya mere, mmepe nke ihe ndị na-arụ ọrụ polymer dị elu nke nwere ike ịrụzi ngwa ngwa na steeti iko bụ ihe ịrụ ụka adịghị ya na nnukwu nsogbu.

N'oge na-adịbeghị anya, Prof. Jinrong Wu's team na College kọrọ otu iko hyperbranched polyurethane (UGPU) nke nwere ike imezi ngwa ngwa na ụlọ okpomọkụ. N'ime ọrụ a, ndị na-eme nchọpụta nwetara ihe polyurethane nwere acyclic heteroatomic chains na hyperbranched Ọdịdị site na-emeghachi omume na monomer usoro. Usoro ihe omimi a pụrụ iche na-ejikọta motility dị elu nke polymers hyperbranched na ọtụtụ hydrogen bonds nke polyurethanes iji mepụta netwọk ikuku hydrogen dị elu nke dabeere na urea bonds, urethane bonds, na branched terminal hydroxyl groups.UGPU nwere ike ike nke ruru ruo 70 MPa, modul nchekwa nke 2.5GPa, na iko mgbanwe okpomọkụ nke dị elu karịa ụlọ okpomọkụ (53 ℃), nke na-eme UGPU ka ọ bụrụ plastik transperent transperent.

UGPU nwere ikike ịgwọ ọrịa onwe ya nke ọma, ọ nwekwara ike nweta ọgwụgwọ onwe onye n'okpuru nrụgide. N'otu oge ahụ, ndị nchọpụta chọpụtara na oke ntakịrị mmiri na-etinye na ngalaba UGPU mere ka ọnụ ọgụgụ nrụzi dịkwuo ngwa ngwa. Ọ bụ ndekọ oge niile maka ihe na-agwọ onwe ya. Ọzọkwa, ihe nlele ahụ a na-emezi nwere ike iguzogide ule na-akpụ akpụ nke 10 MPa, nke zuru ezu iji mezuo ihe ngwa ngwa nke nrụzi ngwa ngwa na ọrụ na-aga n'ihu mgbe mmebi nke ihe nhazi.