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Journal : Matematika dan Sains

 1 
UJI MEKANIK BENANG PLASTIK BERBAHAN DASAR POLIPROPILENA DAN CALPET SEBAGAI PENGUAT Munasir,
Matematika dan Sains Vol 16, No 2 (2009)
Publisher : Matematika dan Sains

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Abstract

The aim of research was to describe the results of mechanical test to plastic string made from polypropilene and calpet. The plastic string was made using extruder machine with variety of temperature (H1-H10). To produce the plastic string that strong, though, and elongation not excess (>24%) needed calpet higher (6-7)% from PP and the high hoven (155-175 oC). From the mechanical test, the plastic string that made from the mixture of PP, calpet and coloring agent of 93%:7%; 94%:6%; 97,2%:2%:0,8% showed the tenacity of 5.1 g/D; 5.9g/D and 4.6 g/D, respectively. The though and strength of plastic string showed the highest value at the tenacity of 5.9 g/D and calpet concentration of 6%. oC). From the mechanical test, the plastic string that made from the mixture of PP, calpet and coloring agent of 93%:7%; 94%:6%; 97,2%:2%:0,8% showed the tenacity of 5.1 g/D; 5.9g/D and 4.6 g/D, respectively. The though and strength of plastic string showed the highest value at the tenacity of 5.9 g/D and calpet concentration of 6%.
STUDI FOTOLUMINESENSI PADA LAPISAN TIPIS Dwikoranto, ; Munasir,
Matematika dan Sains Vol 17, No 1 (2010)
Publisher : Matematika dan Sains

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It had been grown a thin layer of gallium nitride (GaN) above the substrate sapphire (0001) using unbalanced method DC magnetron sputtering.@Deposition temperature were varied between 630-740 oC.@Study of optical properties of the layers GaN thin measurements was done using fotoluminesensi (PL) at room temperature.@The results of PL measurements showed that the intensity of PL spectrum of the higher by raising the temperature of deposition, which means quality optical properties of GaN thin layers the better. GaN thin layers grown has the optical band gap of ~ 3.4 eV and luminesensi dominant place in the blue region (~2.7eV).@Layer thin GaN has a FWHM ~ 0.421eV for the temperature deposition temperature of 740 oC deposition.oC.@Study of optical properties of the layers GaN thin measurements was done using fotoluminesensi (PL) at room temperature.@The results of PL measurements showed that the intensity of PL spectrum of the higher by raising the temperature of deposition, which means quality optical properties of GaN thin layers the better. GaN thin layers grown has the optical band gap of ~ 3.4 eV and luminesensi dominant place in the blue region (~2.7eV).@Layer thin GaN has a FWHM ~ 0.421eV for the temperature deposition temperature of 740 oC deposition.
Co-Authors Adiyanto, Afandi Putra Alhamidy, Muh. Hakim ali, Mohamad Fikri Aliansah Amanati, Anis Yulia Anam, Muhammad Abil Andy, Agus Anggraeni, Anggian Arrayan, Hamdi Budi Jatmiko Darminto, D Diah Hari Kusumawati Dian Sari, Agung Suci Dwikoranto Dyaz, Nandaru Eni Sugiarti Ernawati Ernawati F, Fitriana Famani, Silamai Tya Mariani Fasih Bintang Ilhami, Fasih Bintang Febryan Andinata Fredina Destyorini Gola, Nofefta Hariyono, Eko hudi, hudi Ilma Aulia, Ilma Ilyas, R Marpu Muhidin Jubaedah, Ubed Kemas A. Zaini T. Khoir Fadel, Arfakhsyad Krisdiana, Anita Kurniasari, Laily Yosie Lamhatunnisa, Lamhatun Lydia Rohmawati MACHFIRO, ARI Mahmudin, Wildan Millenia, Salsabila Happy Mohamad Erihadiana, Mohamad Muhamad Januaripin Muhidin, R Marpu Mustofa, Muh Azam Muyasaroh, Anisa Fitri Nadi Suprapto Nafi’a, Ilman Nahar, Agus Samsul Nugrahani Primary Putri NUGROHO, TANTRIANA nurhadi, hafidin Nuriana, Didin Oka Saputra Pratiwi, Taufanny Putri Qiqi Yuliati Zaqiah, Qiqi Yuliati Rachmawati, Tsaniyah Nabilah Rahayu, Nella Puji Rahmadanty, Ferina Ramdani, Miswan Rizky Firmansyah Rosihan Anwar, Rosihan Royani, Alifia Ruswandi, Uus saputri lubis, salma Sihombing, Rizky Agassy sinta agustin, putri Siti Helmyati Suaebah, Evi Subaidi Subaidi, Subaidi Suroaji, Ahmad Syihabuddin, Dimas Muhamad Triwikantoro Triwikantoro Utama Alan Deta Utami, Yekti Purnama Wahono Widodo WAHYU YULIANTI, ZUN Wakfiyah, Khofidotul Wijayaningputri, Arinta Rezty Wulancahayani, Entang Zainuddin, Abu Zainuri, M