Analysis of plastic material moisture absorption and dissipation characteristic for crystal rod holder design optimization

• Main Author: Lee, Pey Jiuan
• Format: Thesis
• Language: English; English
• Published: 2017
• Subjects: T Technology (General); TS Manufactures
• Online Access: http://eprints.utem.edu.my/id/eprint/22476/1/Analysis%20Of%20Plastic%20Material%20Moisture%20Absorption%20And%20Dissipation%20Characteristic%20For%20Crystal%20Rod%20Holder%20Design%20Optimization.pdf; http://eprints.utem.edu.my/id/eprint/22476/2/Analysis%20of%20plastic%20material%20moisture%20absorption%20and%20dissipation%20characteristic%20for%20crystal%20rod%20holder%20design%20optimization.pdf; http://eprints.utem.edu.my/id/eprint/22476/; https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=109166
• Institution: Universiti Teknikal Malaysia Melaka

Crystal rod holders (CRH) are mounted in tunable filter microcircuits assembled inside the Signal or Spectrum Analyzer. Performance repeatability is an important criteria for the Spectrum Analyzer. CRH can be in varieties of design and materials to hold the different tunable filter microcircuit frequency range. The problem is the crystal rod holder having moisture absorption and latent failure over time. The objective of this project is to study the moisture absorption and dissipations rate for different grade of plastic materials in the production environment, targeting to understand the current plastic characteristic and to identify alternative plastic materials for product functional optimization. Experiments were performed to compare the plastic materials under study with the current material on the moisture absorption and dissipation rate. The experiments were performed by utilizing the available resources, tools and equipment in the production floor. Samples were prepared to evaluate the moisture absorption and dissipations rate. At the end of the project, equations were generated to estimate moisture absorption rate and drying temperature versus time to eliminate moisture after exposure to the atmosphere over time. Besides, the testing criteria of the internal standards of MILSTD 883 and MILSTD 2100 qualification were applied in this experiment study as well.