Plastik ne rɔba yɛ polymer ade koro no ara. ɛyɛ carbon ne hydrogen atɔm titiriw. afoforo afoforo nso wɔ oxygen, nitrogen, chlorine, silicon, fluorine, sulfur ne atom afoforo a ɛwɔ hɔ no kakraa bi{2}} wɔn su yɛ soronko na wɔn a wɔde di dwuma no yɛ soronko{3}} no yɛ nea ɛyɛ den sen biara wɔ dan mu hyew mu, ɛnyɛ nea ɛyɛ den sen no, ɛyɛ den sen{ yɛ elastic, wobetumi atrɛw mu na ayɛ tenten, na wobetumi asan de ntrɛwmu no aba ne mfitiase tebea. eyi fi wɔn molecule nhyehyɛe ahorow. nsonsonoe foforo ne sɛ wobetumi asan de plastic ayɛ adwuma na wɔasan de adi dwuma mpɛn pii, bere a rɔba ntumi nsan nyɛ adwuma tẽẽ{7}} no betumi ayɛ nea wɔde di dwuma kɛse wɔ ne su ahorow mu, enti nea ɛbɛn no yɛ nea ɛbɛn no ansa na ɛreba no{8
1) Thermal conductive rɔba no yɛ ɔhyew conductor a enye, na ne thermal conductivity yɛ bɛyɛ 2.2 ~ 6.28 watts/m2·0K bere a ne kɛse yɛ 25 mM{10}} ɛyɛ ɔhyew a ɛyɛ papa a ɛma ɔhyew a ɛyɛ den. no sɛ rɔfo no yɛ kɛse a, ɛma nsu no yɛ kɛse, ɛma ɛyɛ kɛse na ɛma ɛyɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse na ɛma nsu no yɛ kɛse na ɛma nsu no yɛ kɛse na ɛma ɛyɛ kɛse. kosi 0.4 ~ 2.0 watts. Rɔba afã biara a wɔde di dwuma no betumi ama ɔhyew aba esiane hysteresis a ɛyera nti, enti ɛsɛ sɛ wɔhwɛ yiye na ama ɔhyew no asɛe.
Ɔhyew ntrɛwmu esiane free volume kɛse a ɛda rɔba molecule nkɔnsɔnkɔnsɔn ntam nti, afã horow no mu a ɛkyinkyini no bɛyɛ mmerɛw bere a ɔhyew no kɔ soro no, a ɛma volume no yɛ kɛse{0}} linear ntrɛwmu coefficient a ɛwɔ rɔba no mu no bɛyɛ dade{2}} no bɛyɛ mpɛn 20? Model. Wɔ rɔba koro no ara ho no, rɔba aduru no mu den ne nea wɔannoa a ɛwɔ rɔba mu no wɔ rɔba aduru no shrinkage rate kɛse. nkɛntɛnso a shrinkage no nya no ne den a ɛne gelatin a ɛwɔ rɔba no mu no hyia na ɛne no hyia Ɔreba a ɛne rɔba a ɛwɔ rɔba no mu no hyia wɔ nsusuwii a ɛfa rɔba ahorow ho no yɛ rɔba Natural rɔba, a ɛno nti na wɔpaw rɔba sɛ pipe fittings industry. ade titiriw nti a nneɛma a wɔde yɛ adwuma no. wɔ nnɛ rɔba adwumayɛ mu ntɛmntɛm no, wiase rɔba adwumayɛ no wɔ tɔn bɛboro U.S. dɔla ɔpepepem 250, rɔba nneɛma fi bere tenten ayɛ aguade a ɛho hia wɔ amanaman ntam aguadi mu. Wɔ wiase gua so no, rɔba nneɛma ayɛ tae sɛ mfinimfini, a ɛtwe adwene si mfiridwuma ne adansi nneɛma so, a nea ɛka ho ne nneɛma a wɔyɛ no da biara da te sɛ rɔba mpaboa ne teyp, ne nneɛma akuw te sɛ aduruyɛ ne akwahosan, amammerɛ ne agumadi.