IMPROVEMENT OF THE PROPERTIES OF INSULATING POLYMERS USING ARAMID FIBER FOR SOLID ROCKET MOTOR INSULATION
Bibliographic record
Abstract
Development and characterization of asbestos-free rubbers for use as rocket motor insulators are presented. Such insulation is based on aramid fiber in the pulp form as reinforcement for Ethylene Propylene Diene Monomer (EPDM) in the liquid form.Aramid fiber (Kevlar) in the pulp form has been used and characterized as EPDM filler material. This method permits manufacturing EPDM rocket motor insulation in which Kevlar pulps are dispersed and immobilized in the EPDM polymeric matrix. A detailed description and procedure for the mixing cycle is explained. The curing methodology was justified. Kevlar pulp/EPDM has been shown to exhibits better thermal properties than its asbestos containing counterpart. Its thermal characteristics however fall short of some of the best asbestos insulators.Insulation material description, processing and manufacturing techniques are discussed along with thermal properties (effective thermal conductivity, effective specific heat capacity and effective thermal diffusivity). The physical and mechanical properties (density, hardness, tensile strength and elongation) of different compositions were obtained. The ablation resistance was measured. Thermo-gravimetric analyses versus Kevlar pulp content, as well as a differential scanning calorimetry are discussed. The effect of changing Kevlar pulp volume fraction was studied. Also a comparison of Kevlar pulp/EPDM's performance (both thermally and mechanically) with other rocket motor insulating materials was done.Kevlar pulp filled EPDM has been shown to exhibit better thermal, mechanical, physical and ablative properties than its asbestos containing counterpart.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".