The Curing Properties of Natural Rubbers with DPTT

• Main Authors: Hong-Sheng Wu, 吳泓陞
• Other Authors: RWEI, SYANG-PENG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/gpx7ju

碩士 === 國立臺北科技大學 === 分子科學與工程系有機高分子碩士班 === 107 === In this study, a solvent-based pressure sensitive adhesive was synthesized by bridging the reaction of dipentamethylene thiuram (DPTT) with natural rubber in a solvent to investigate the temperature and the adhesion and cohesion of the bridge after bridg-ing. This paper is divided into three parts: The first part: the formulation without the cross-linking agent was used as the control group. After the addition of the cross-linking agent, the fixed wooden value was 70, and the heating temperature of the sample was 65 ° C * 3 hrs, and the difference under the cross-linking conditions was observed. In the second part, after the addition of the cross-linking agent, the influence of dif-ferent Mooney values was observed, and the influence of the Mooney value on the degree of cross-linking and physical properties was used to find the most suitable cross-linking conditions and related changes. In the third part, after adding the cross-linking agent, the influence of temperature on the degree of cross-linking and physical properties is observed to determine the most suitable cross-linking conditions and related changes. In the pressure sensitive adhesive, the holding force is directly related to the cohesive force, and the use of the double-pentamethylene thiuram bridge can greatly improve the cohesive force without affecting the adhesive property. The physical property analysis uses a tabletop tensile testing machine, a rolling ball method, and a retention force tester. In this paper, a pressure sensitive adhesive bridging a PVC film was successfully synthesized, which can be combined with rubber in toluene by disulfide methylene thiuram tetrasulfide (DPTT) and zinc dibutyl dithiocarbamate (ZDBC). Under low temperature bridging, the cohesive force of the pressure sensitive adhesive is increased without affecting other adhesive properties, and it can be used in other wet coating and temperature limiting reactions in the future.