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.3. Formulation of PS/PPI blendsPS
.3. Formulation of PS/PPI blends
PS and PPI were mixed at different ratios (100:0, 90:10, 80:20,
70:30, 60:40 and 50:50) using a mixer (Vortex. Genie2, Scientific
Industries, American).
2.4. Water absorption capacity, solubility and swelling power
Water absorption capacity (WAC), swelling power (SP) and sol- ubility were determined at 60 ◦ C, 70 ◦ C, 80 ◦ C and 90 ◦ C, using the method of Sathe and Salunkhe (1981) with the following modifi- cations: 40 mL of a 1% sample suspension (by mass per volume) were prepared in a 50 mL centrifuge tube. A magnetic agitator was placed in the tube, and the suspension was kept at a constant tem- perature (60 ◦ C, 70 ◦ C, 80 ◦ C or 90 ◦ C) in a water bath for 30 min. The suspension was centrifuged at 4000 rpm for 15 min, then the supernatant was decanted and the swollen granules were weighed. A 10 mL sample was taken from the supernatant, placed in a Petri dish and dried in an air oven at 120 ◦ C for 4 h to reach constant mass. WAC, solubility and SP were calculated using the following equation:
PS and PPI were mixed at different ratios (100:0, 90:10, 80:20,
70:30, 60:40 and 50:50) using a mixer (Vortex. Genie2, Scientific
Industries, American).
2.4. Water absorption capacity, solubility and swelling power
Water absorption capacity (WAC), swelling power (SP) and sol- ubility were determined at 60 ◦ C, 70 ◦ C, 80 ◦ C and 90 ◦ C, using the method of Sathe and Salunkhe (1981) with the following modifi- cations: 40 mL of a 1% sample suspension (by mass per volume) were prepared in a 50 mL centrifuge tube. A magnetic agitator was placed in the tube, and the suspension was kept at a constant tem- perature (60 ◦ C, 70 ◦ C, 80 ◦ C or 90 ◦ C) in a water bath for 30 min. The suspension was centrifuged at 4000 rpm for 15 min, then the supernatant was decanted and the swollen granules were weighed. A 10 mL sample was taken from the supernatant, placed in a Petri dish and dried in an air oven at 120 ◦ C for 4 h to reach constant mass. WAC, solubility and SP were calculated using the following equation:
0/5000
3. Perumusan PS PPI campuran
PS dan PPI dicampur pada rasio yang berbeda (100:0, 90:10, 80: 20,
70:30, 60: 40 dan 50: 50) menggunakan mixer (Vortex. Genie2, Scientific
industri, American).
2.4. Air kapasitas penyerapan, kelarutan dan pembengkakan kekuatan
kapasitas penyerapan air (WAC), pembengkakan kekuasaan (SP) dan sol-ubility ditentukan di 60 cita C, cita 70 C, cita 80 C dan cita 90 C, menggunakan metode top down Racing dan Salunkhe (1981) dengan modifi-kation berikut: 40 mL suspensi sampel 1% (oleh massa setiap volume) disusun dalam 50 mL centrifuge tabung. Pengaduk magnet ditempatkan di tabung, dan suspensi tetap konstan tem-perature (60 cita C, cita 70 C, cita 80 C atau cita 90 C) dalam penangas air selama 30 menit. Suspensi disentrifugasi 4000 rpm untuk 15 menit kemudian supernatant adalah tertuang dan butiran bengkak ditimbang. 10 mL sampel diambil dari supernatant, ditempatkan dalam cawan Petri dan dikeringkan dalam oven udara di cita 120 C untuk 4 h untuk mencapai massa konstan. WAC, kelarutan dan SP dihitung menggunakan persamaan berikut:
PS dan PPI dicampur pada rasio yang berbeda (100:0, 90:10, 80: 20,
70:30, 60: 40 dan 50: 50) menggunakan mixer (Vortex. Genie2, Scientific
industri, American).
2.4. Air kapasitas penyerapan, kelarutan dan pembengkakan kekuatan
kapasitas penyerapan air (WAC), pembengkakan kekuasaan (SP) dan sol-ubility ditentukan di 60 cita C, cita 70 C, cita 80 C dan cita 90 C, menggunakan metode top down Racing dan Salunkhe (1981) dengan modifi-kation berikut: 40 mL suspensi sampel 1% (oleh massa setiap volume) disusun dalam 50 mL centrifuge tabung. Pengaduk magnet ditempatkan di tabung, dan suspensi tetap konstan tem-perature (60 cita C, cita 70 C, cita 80 C atau cita 90 C) dalam penangas air selama 30 menit. Suspensi disentrifugasi 4000 rpm untuk 15 menit kemudian supernatant adalah tertuang dan butiran bengkak ditimbang. 10 mL sampel diambil dari supernatant, ditempatkan dalam cawan Petri dan dikeringkan dalam oven udara di cita 120 C untuk 4 h untuk mencapai massa konstan. WAC, kelarutan dan SP dihitung menggunakan persamaan berikut:
Sedang diterjemahkan, harap tunggu..
.3. Formulation of PS/PPI blends
PS and PPI were mixed at different ratios (100:0, 90:10, 80:20,
70:30, 60:40 and 50:50) using a mixer (Vortex. Genie2, Scientific
Industries, American).
2.4. Water absorption capacity, solubility and swelling power
Water absorption capacity (WAC), swelling power (SP) and sol- ubility were determined at 60 ◦ C, 70 ◦ C, 80 ◦ C and 90 ◦ C, using the method of Sathe and Salunkhe (1981) with the following modifi- cations: 40 mL of a 1% sample suspension (by mass per volume) were prepared in a 50 mL centrifuge tube. A magnetic agitator was placed in the tube, and the suspension was kept at a constant tem- perature (60 ◦ C, 70 ◦ C, 80 ◦ C or 90 ◦ C) in a water bath for 30 min. The suspension was centrifuged at 4000 rpm for 15 min, then the supernatant was decanted and the swollen granules were weighed. A 10 mL sample was taken from the supernatant, placed in a Petri dish and dried in an air oven at 120 ◦ C for 4 h to reach constant mass. WAC, solubility and SP were calculated using the following equation:
PS and PPI were mixed at different ratios (100:0, 90:10, 80:20,
70:30, 60:40 and 50:50) using a mixer (Vortex. Genie2, Scientific
Industries, American).
2.4. Water absorption capacity, solubility and swelling power
Water absorption capacity (WAC), swelling power (SP) and sol- ubility were determined at 60 ◦ C, 70 ◦ C, 80 ◦ C and 90 ◦ C, using the method of Sathe and Salunkhe (1981) with the following modifi- cations: 40 mL of a 1% sample suspension (by mass per volume) were prepared in a 50 mL centrifuge tube. A magnetic agitator was placed in the tube, and the suspension was kept at a constant tem- perature (60 ◦ C, 70 ◦ C, 80 ◦ C or 90 ◦ C) in a water bath for 30 min. The suspension was centrifuged at 4000 rpm for 15 min, then the supernatant was decanted and the swollen granules were weighed. A 10 mL sample was taken from the supernatant, placed in a Petri dish and dried in an air oven at 120 ◦ C for 4 h to reach constant mass. WAC, solubility and SP were calculated using the following equation:
Sedang diterjemahkan, harap tunggu..
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