Silicone raw rubber bụ ihe na-ewusi ike nke roba ngwakọta. Ngwongwo nke rubber compound mere site na ụdị roba raw dị iche iche dị iche iche
nke ukwuu. Ihe ndị a chọrọ maka rọba raw dị iche iche n'etiti ụdị roba dị iche iche.A na-ekpebi ihe ndị bụ isi nke rọba raw site na ihe ngosi atọ: oke molar, ọdịnaya vinyl na ihe na-agbanwe agbanwe.
N'oge nhazi, a na-ejikarị rọba raw nwere ihe dị arọ dị iche iche na ihe dị n'ime vinyl na-ejikọta ya na akụkụ ụfọdụ. Nke dị elu nke siri ike nke ngwaahịa ahụ, ihe dị elu nke vinyl nke raw roba chọrọ. A na-achọkarị ihe na-agbanwe agbanwe ka ọ dị oke oke (1% ruo 2%). Ọ bụrụ na ihe na-agbanwe agbanwe dị oke elu, ngwongwo roba ga-adị nhịahụ na arụmọrụ ya ga-adaba, ma ọ bụrụ na ihe na-agbanwe agbanwe dị oke ala, ọ ga-esi ike maka ngwongwo roba ka ọ "jiri ntụ ntụ".
Generally speaking, the higher the molar mass, the better the physical and mechanical properties of the vulcanized rubber, but its processability and fluidity will decline, and the speed of "powder intake" (filler mixing into raw rubber) will slow down. When processing molded compound rubber, raw rubber with a high molar mass (>600,000) a na-ahọrọkarị. Otú ọ dị, mgbe ị na-emepụta ngwaahịa ndị a na-emepụta ihe, iji meziwanye mmiri mmiri nke extrusion, oke anụ ahụ kwesịrị ịdị ntakịrị ala. Ogo ọdịnaya vinyl nwere mmetụta dị ukwuu na arụmọrụ zuru oke nke rọba agwakọta. Arụmọrụ na ngbanwe nke roba ogige nwere ọdịnaya vinyl nke 0.1% ruo 0.2% kacha mma.