?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+PENAMBAHAN+SILIKA+TERHADAP%0D%0AKEKUATAN+TARIK+KOMPOSIT+SILIKA+-+KARET+ALAM&rft.creator=HENDY+RIYANTO+%2C+1015021034&rft.subject=Teknik+mesin+dan+mesin&rft.description=Karet+alam+merupakan+salah+satu+komoditas+perkebunan+yang+paling+penting%0D%0Adalam+perekonomian+Indonesia.+Sebagian+besar+petani+karet+di+Indonesia+lebih%0D%0Amemilih+menjual+karet+alam+hasil+sadapan+mereka+kepada+pengepul+dengan+harga%0D%0Ayang+relatif+murah.+Hal+ini+disebabkan+oleh+kurang+mengertinya+petani+karet%0D%0Atentang+cara+pemrosesan+karet+olahan+agar+menghasilkan+produk+olahan+karet%0D%0Ayang+berkualitas+dan+tentunya+bernilai+jual+tinggi+sehingga+dapat+menambah%0D%0Akeuntungan+bagi+para+petani+karet.+Salah+satu+peningkatan+nilai+ekonomis+karet%0D%0Aadalah+dengan+membuat+komposit+berbahan+dasar+karet+alam.+Komposit+adalah%0D%0Amaterial+yang+tersusun+atas+campuran+dua+atau+lebih+material+dengan+sifat+kimia%0D%0Adan+fisika+berbeda%2C+dan+menghasilkan+sebuah+material+baru+yang+memiliki+sifatsifat%0D%0Aberbeda+dengan+material-material+pengusunnya.+Tujuan+dari+penelitian+ini%0D%0Aadalah+mengetahui+kekuatan+tarik+komposit+silika-karet+alam.+Bahan+pengisi%0D%0Akomposit+yang+digunakan+pada+penelitian+ini+adalah+silika+dengan+fraksi+massa%0D%0Asilika+sebesar+20%25%2C+25%25%2C+dan30%25.%0D%0APengujian+komposit+ini%2C+menggunakan+pengujian+tarik+dengan+ASTM+D-412.+Dari%0D%0Ahasil+pengujian+tarik+tersebut+diperoleh+nilai+kekuatan+tarik+terendah+pada+fraksi%0D%0Amassa+20%25+yaitu+dengan+nilai+1%2C+173+MPa.+Hasil+uji+tarik+tertinggi+pada+fraksi%0D%0Amassa+25%25%2C+dengan+nilai+sebesar+1%2C339+MPa.+Dan+untuk+fraksi+massa+30%25%0D%0Adiperoleh+nilai+sebesar+1%2C221+MPa.+Hasil+pengujian+tarik+tersebut+menunjukkan%0D%0Ahubungan+antara+fraksi+massa+dengan+uji+tarik%2C+penambahan+fraksi+massa+silika%0D%0Aberbanding+terbalik+dengan+kekuatan+tarik+dan+regangannya.+Berdasarkan+hasil%0D%0AScanning+Electron+Microscope+menunjukkan+agglomerat+dan+void+merupakan%0D%0Apenyebab+utama+kegagalan+komposit.%0D%0AKata+kunci%3A+Komposit%2C+karet+alam%2C+silika%2C+fraksi+massa%2C+kekuatan+tarik%2C+Scanning%0D%0AElectron+Microscope+(SEM).%0D%0A%0D%0AABSTRACT%0D%0A%0D%0ANatural+rubber+is+one+of+the+most+important+plantation+commodities+in+Indonesia's%0D%0Aeconomy.+Most+of+the+rubber+farmers+in+Indonesia+prefer+to+sell+natural+rubber%0D%0Afrom+their+tappers+to+the+middleman+with+a+cheap+price.+This+is+caused+by+the+lack%0D%0Aof+understanding+of+rubber+farmers+on+how+to+process+processed+rubber+to+produce%0D%0Ahigh+quality+rubber+processing+products+and+of+course+high+selling+value+so+as+to%0D%0Aincrease+profits+for+rubber+farmers.+One+of+the+increasing+economic+value+of%0D%0Arubber+is+by+making+composite+based+on+natural+rubber.+Composites+are+materials%0D%0Acomposed+of+a+mixture+of+two+or+more+materials+with+different+chemical+and%0D%0Aphysical+properties%2C+and+produce+a+new+material+that+has+different+properties+from%0D%0Aits+constituent+materials.+The+purpose+of+this+research+is+to+know+the+tensile%0D%0Astrength+of+natural+silica-rubber+composite.+The+composite+filler+used+in+this+study%0D%0Awas+silica+with+a+silica+mass+fraction+of+20%25%2C+25%25%2C+and+30%25.%0D%0AThis+composite+testing%2C+using+tensile+testing+with+ASTM+D-412.+From+the+tensile%0D%0Atest+results+obtained+the+lowest+tensile+strength+value+at+the+fraction+of+20%25+mass%0D%0Awith+a+value+of+1%2C+173+MPa.+The+highest+tensile+test+results+at+a+25%25+mass+fraction%2C%0D%0Awith+a+value+of+1.339+MPa.+And+for+a+mass+fraction+of+30%25+obtained+value+of%0D%0A1.221+MPa.+The+tensile+test+results+show+the+relationship+between+the+mass%0D%0Afraction+and+the+tensile+test%2C+the+addition+of+the+silica+mass+fraction+is+inversely%0D%0Aproportional+to+the+tensile+strength+and+strain.+Based+on+the+results+of+Scanning%0D%0AElectron+Microscope+shows+agglomerat+and+void+is+the+main+cause+of+composite%0D%0Afailure.%0D%0AKeywords%3A+Composite%2C+natural+rubber%2C+silica%2C+mass+fraction%2C+tensile+strength%2C%0D%0AScanning+Electron+Microscope+(SEM).&rft.publisher=FAKULTAS+TEKNIK&rft.date=2017-10-24&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F30601%2F1%2FABSTRAK%2520%2528ABSTARCT%2529.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F30601%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F30601%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++HENDY+RIYANTO+%2C+1015021034++(2017)+PENGARUH+PENAMBAHAN+SILIKA+TERHADAP+KEKUATAN+TARIK+KOMPOSIT+SILIKA+-+KARET+ALAM.++FAKULTAS+TEKNIK%2C++UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F30601%2F