CAJ | 학술논문

研究了氧化锆凝胶浇注成型工艺中,水溶性环氧树脂凝胶剂对浆料的流变性和固化过程的影响.结果表明:环氧树脂的加入增加了浆料的黏度,但可制备固体含量为53.7%(体积分数),黏度为0.60Pa·s(剪切速率为100 s-1),适合浇注的浆料;为得到较高弹性模量的凝胶,固化剂(二丙三胺)最佳加入量为3.4%(质量分数);环氧树脂溶液的聚合过程和氧化锆浆料的固化过程对温度都具有较大的依赖性,利用这些依赖性可控制浆料的制备、浇注和固化过程.30℃时,浆料中环氧树脂的聚合反应在8min后开始,20min后浆料失去流动性,1 h后浆料完全固化,湿坯弹性模量达到1.96MPa.固化温度越高,浆料固化越快,固化后湿坯的弹性模量就越高.
연구료양화고응효요주성형공예중,수용성배양수지응효제대장료적류변성화고화과정적영향.결과표명:배양수지적가입증가료장료적점도,단가제비고체함량위53.7%(체적분수),점도위0.60Pa·s(전절속솔위100 s-1),괄합요주적장료;위득도교고탄성모량적응효,고화제(이병삼알)최가가입량위3.4%(질량분수);배양수지용액적취합과정화양화고장료적고화과정대온도도구유교대적의뢰성,이용저사의뢰성가공제장료적제비、요주화고화과정.30℃시,장료중배양수지적취합반응재8min후개시,20min후장료실거류동성,1 h후장료완전고화,습배탄성모량체도1.96MPa.고화온도월고,장료고화월쾌,고화후습배적탄성모량취월고.
Water soluble epoxy resin was used as gel former in the zirconia gelcasting process. The rheologieal properties and gelation behavior of the zirconia slurry were investigated. The rheological data shows that the slurry viscosity increases in the presence of epoxy resin. For the slurry with a solid phase content of 53.7% (in volume), the acceptable viscosity is about 0.60 Pa-s at 100 s-1. In order to obtain high elastic modulus polymer gel, the optional hardener (dipropylentriamin) content is 3.4% (in mass). Since the polymerization and gelation process depends greatly on the temperature, the gelation process can be controlled by controlling the temperature. At 30 ℃, the polymerization of epoxy resin in the slurry begins at 8 min. The slurry loses fluidity after 20 min, and slurry solidification is completed within 1h at 30--40 ℃. The elastic modulus (G')of the wet green bodies is 1.96 MPa. Compared with gelation at 30 ℃, the gelation process is hastened by higher temperature and results in higher G' of wet green bodies.