IMPROVING THE QUALITY OF MEMORIZATION OF AL-QURAN THROUGH THE IMPLEMENTATION OF TAKRIR METHOD IN ISLAMIC BOARDING SCHOOL MATHOLIB AS-SULUK CIREBON

Many assume that people who have grown up do not have the opportunity to memorize the Qur'an because of the difficulties that will be faced in the process of memorizing it rather than in childhood. This research aims to find out (1) the application of the takrir method in Ponpes Matholib As-Suluk. (2) factors that affect students' ability to memorize by takrir method, (3) the quality of memorization of the holy verse of the Qur'an using the takrir method. This study uses descriptive qualitative methods. Through the technique of interviewing, observation and documentation studies, several findings were obtained: (1) the application of the takrir method in Ponpes Matholib As-Suluk was applied through the repetition of santri memorization in four ways: individual takrir, collective takrir with friends, takrir with teachers, and takrir at prayer time; (2) there are 2 factors that affect the application of takrir methods: internal (santri mood) and external factors (pesantren environmental support); and (3) the application of this method succeeded in improving the quality of santri memorization because the students were able to improve their memorization quite quickly and they were also able to reread verses and surahs that had been memorized quite smoothly.

Synthesis and Charaterization of Polyurethane Composite Materials Derived from Hydroxy Terminated Polyepichlorohydrins

Hydroxy terminated polyepichlorohydrins (PECH) of different molecular weights were synthesized using a novel catalyst and co-catalyst combinations. Different polymerization conditions like temperature, time and monomer addition rates exhibited pronounced effect on the molecular weight, polydispersity and functionality of the products. After optimization of the conditions, polyepichlorohydrins of three different molecular weights i.e., 1045, 2497 and 3521 daltons were selected for the preparation of their polyurethane elastomers (PUE). The DSC studies of the polyol displayed linear increase in glass transition temperature (Tg) with the increase in its molecular weight (-35.6 to -28.3 oC). In second part of the present study two series of polyurethane elastomers were prepared by prepolymer method from polyepichlorohydrins (polyols) of three different molecular weights, aromatic (TDI) and cycloaliphatic (IPDI) diisocyanates and three chain extenders (1,4-butadiol, 1,6-hexanediol and cyclohexanedimethanol). The structural elucidation of PECH and its elastomers was carried out by FT-IR and NMR spectroscopic techniques. The change in molecular weight (polyol), type of diisocyanate, nature of chain extender and amount of chain extenders engendered significant effect on the surface morphology and thermo-mechanical properties of the resulting PUEs. Aromatic diisocyanate based elastomer (P25TDIDM10) exhibited optimum UTS (8.11 MPa) and elongation at break (511.7%) whereas cycloaliphatic diisocyanate elastomer (P10IPDIDM10) showed 8.58 MPa UTS and elongation at break (511.7%). All the polyurethane elastomers were stable up to 200 °C and were degraded without melting to constant mass above 450 °C. Tg of TDI based PUE was increased to -16 oC while in IPDI series it was further shifted to 7.98 oC. In the third part of this research work, selective polyurethane elastomer P10IPDIDM10 was used, due to its superior properties, as a matrix for the synthesis of polymer based composites. Graphite, aluminium flakes and aluminium powder were used in different proportions (5-15%) as fillers in the polymer matrix composites. Incorporation of fillers enhanced the UTS with corresponding decrease in elongation at break, whereas in case of graphite, electrical properties of the composite were also improved. The present study revealed that the synthesized PUEs and composites were found promising candidates for various advanced applications.