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1、StudyonPropertiesofNaturalRubber（Partly）1TreeofRubberNaturalrubbercollectedfromplantfluids,althoughtheworldhas2000DuoZhongplantscanproducenaturalrubber,butalarge-scalepromotionplantingisthemainrubberBrazil.Thenaturalrubberinthemaincomponentisthetypegatherisoprene,h
2、astheflexibility,andsetouthighstrength,theanti-peelresistanceandwearresistance,easytobegoodwithothermaterialandothercharacteristics,widelyusedinadhesivetape,rubbertires,productsoftheproduction.Brazilorrubberhightemperature,highhumidity,wind,fertilesoil,mainlygrowin
3、southeastAsia,andotherlow-latituderegion.NaturalconditionsinChina,byrestrictingonlyhainan,guangdong,yunnan,climateconditionscangrow,usableareaisabout15millionmu,atpresenthasplanted14millionacresaround,theannualoutputis600000tons.2Thecharacteristicsanddistributionof
4、naturalrubberRubberisoriginatedintheBrazilianamazonriverbasininthewesternregion,isnowhorse-drawnyueclothandAsia,Africa,Oceania,LatinAmericaDuoGe40countriesandregions.Plantingareaislargernationshave:Indonesia,Thailand,Malaysia,China,India,Vietnam,Nigeria,Brazil,SriL
5、anka,Liberia,etc.ZhiJiaoareaismainlydistributedinhainan,guangdong,guangxi,yunnan,fujian,Taiwanalsocanbeplantedinhainan,amongthemasthemainZhiJiaoarea.Naturalrubbertreeplanting,tropicalrainforestsofregionalbasicdistributionwithin15℃intheequator,mainlyinsoutheastAsia,
6、ataboutoftheworldnaturalrubberplantingareaof90%.ThemainproducershaveThailand,Indonesia,Malaysia,China,India,VietnamandBurma,SriLanka,especiallythetotaloutputisgivenpriorityto,beforemorethan60%ofworldoutput,andwillproducethatmostofthenaturalrubberforexport,amongthem
7、,ThailandandIndonesiahaveexportsthanashighas90%above.Thailand,IndonesiaandMalaysiaperiodintheAprilgeneraltappingrubbertreestothefollowingFebruary.3VarietiesNaturalrubber,alsocalledChinarubberorcaoutchouc,isanelastomer(anelastichydrocarbonpolymer)thatwasoriginallyde
8、rivedfromlatex,amilkycolloidproducedbysomeplants.Theplantswouldbe‘tapped’,thatis,anincisionmadeintothebarkofthetreeandthesticky,milkcoloredlatexs
