This research work was to study the toughening modification of polylactic acid by the mixing with epoxidized natural rubber (ENR) and the increase of effectiveness of mechanical properties with a compatibilizer. Enhancement of properties in polylactic acid was evaluated by tensile and impact testings Fourier-transform Infrared Spectroscopy (FTIR) technique Differential Scanning Calorimetry (DSC) technique and Scanning Electron Microscope (SEM). For the addition of ENR it was revealed that the increase of ENR contents improved elongation at break and impact strength but decreased tensile modulus and ultimate tensile strength. Glass transition temperature (Tg) percentage crystallinity and the melting point of polylactic acid tended to decrease with the addition of ENR. Chemical change was found that position of C=O peak in polymer blend was slightly shifted as compared to the spectrum of neat polylactic acid. The optimum formulation for toughening modification was ENR content of 30 wt%. Its impact strength was 1982.55 % of neat polylactic acid. For increasing effectiveness of mechanical properties with a compatibilizer it revealed that the addition of Joncryl ® ADR-4300 as compatibilizer improved both tensile and impact properties. The optimum loading of a compatibilizer for improving mechanical properties was 0.5 wt% of polylactic acid. The decreases of crystallinity and melting point of polylactic acid with adding Joncryl ® ADR-4300 might be because Joncryl ® ADR-4300 was also chain extender of polylactic acid and it might be obstructing crystallization. The presence of Joncryl ® ADR-4300 unaffected on Tg value and chemical change.

The purpose of this study is design to develop double-walled design of natural materials (bamboo) to reduce radiant heat into the building. Reduce construction costs by using natural materials that are readily available locally. And can reduce the cost of energy use in the residential conditions occurring prior to cozy up to. The results of the double-walled design forms the third and then put to the test transmission of the sun. And select the appropriate model to test the temperature of the material other five by the results of the experiment showed that during the day as the first the second the fourth the fifth the temperature inside the box. The outside temperature is lower than the highest temperature. Especially in the case of five minimum temperature inside the box than any event since the space between two walls of floor to localized heat. But in this study tested the two-story wall material that attaches to the outside of the building is important. Wall mounted double-walled bamboo in the open with temperatures under all circumstances.

The objectives of the research werw 1)to study the creative level of Prathomsuksa 5 students who take constructivism learning 2)to com[pare the creativity of Prathomsuksa 5 students learning of the constructivism form with those learning of the normal form 3)to study the satisfactions towards learning in accordance with the constructivism form of Prathomsuksa 5

This research is to study and develop natural pulp materials for packaging. This is the agricultural waste. To benefit commercially To build capacity and capability in economic development and environmental conservation Is the creation of packaging work Formed in sheets and shapes using natural materials such as mulberry paper pineapple paper. And banana paper Then design and create the packaging. To test the properties. According to the standard packaging. They also sought satisfaction in the form and use of natural pulp materials. Include the packaging according to the case study. Research indicates that When developing pulp quality The banana paper can not be printed. Can print lines. But screen printing is not suitable for banana paper. Foil printing case when mulberry paper and pineapple paper Foil printing Printing lines Can be done well on mulberry paper and pineapple paper. Death images can be printed on all three types of paper but the screen is not good. Sealing material from natural pulp onto corrugated paper. From the test it was found that the amount of adhesive that was suitable for sealing was between 20-30 mg. If the adhesive was less than 20 milligrams only mulberry paper was sealed. The amount of glue at 50 milligrams is the amount of glue is too high causing all three types of paper to rot. Because of the adsorption of glue to the pulp. Packaging material from natural pulp. Fold of banana paper that does not pass the test. The banana paper is high in strength. When folding the packaging causes the pulp to split along the crease. Can not be molded. Evaluation of the satisfaction with the form and use of packaging materials from natural pulp. It was found that the average value of paper pulp suitable for packaging materials from natural pulp was the most agreeable paper. Secondly paper shreds are very popular and the last one is banana paper. Moderate agreement

This research aims to investigate and test the feasibility of the production of natural teak sheets and study the appropriate production methods. Study physical properties and mechanical properties to compare with industry standard insulation sheet. The ratio of tattoo and hyacinth. 5% 7% 9% of the material were dried at 400 600 800 kg / m3. The results showed that the modulus rupture. Elastic modulus And thickness swelling. It varies with the amount of glue. The nature of the tattoo causes absorption in the material if the density increases the water absorption will decrease. Compared to standard insulation products. The amount of adhesive is 7% of the weight of the material when dry. The density of 800 kg / m 2 is 25 kg / cm2. 140 degree Celsius ruptured modulus and elastic modulus But the thickness of the swelling has not met the criteria. In the next production should be mixed waterproofing in the work.