CAJ | 학술논문

以八甲基环四硅氧烷和SiCl_4为原料,通过阳离子开环聚合合成了端基为氯的α-氯-ω-三氯线型聚硅氧烷(PTCSO)偶联剂,采用傅里叶变换红外光谱、硅核磁共振、端基滴定法对其结构进行了表征.用质量分数6%(相对于气相白炭黑的质量)的PTCSO偶联剂改性气相白炭黑,并填充到硅橡胶中,考察了增强硅橡胶的力学性能.实验结果表明,在硅橡胶中填充40份(质量份数,基于100份的硅橡胶)改性气相白炭黑的增强硅橡胶的拉伸强度为9.9 MPa,较填充40份未改性气相白炭黑的硅橡胶的拉伸强度(7.2 MPa)提高了37.5%;当改性气相白炭黑用量增至60份时,增强硅橡胶的拉伸强度达到最大值(11.2 MPa),改性气相白炭黑的增强作用明显.透射电子显微镜表征结果显示,当改性气相白炭黑的用量为60份时,改性气相白炭黑仍能均匀分散在硅橡胶中,且颗粒团聚倾向小.
이팔갑기배사규양완화SiCl_4위원료,통과양리자개배취합합성료단기위록적α-록-ω-삼록선형취규양완(PTCSO)우련제,채용부리협변환홍외광보、규핵자공진、단기적정법대기결구진행료표정.용질량분수6%(상대우기상백탄흑적질량)적PTCSO우련제개성기상백탄흑,병전충도규상효중,고찰료증강규상효적역학성능.실험결과표명,재규상효중전충40빈(질량빈수,기우100빈적규상효)개성기상백탄흑적증강규상효적랍신강도위9.9 MPa,교전충40빈미개성기상백탄흑적규상효적랍신강도(7.2 MPa)제고료37.5%;당개성기상백탄흑용량증지60빈시,증강규상효적랍신강도체도최대치(11.2 MPa),개성기상백탄흑적증강작용명현.투사전자현미경표정결과현시,당개성기상백탄흑적용량위60빈시,개성기상백탄흑잉능균균분산재규상효중,차과립단취경향소.
A macromolecular coupling agent of α chlorine ω trichlorine polysiloxane group ended with chlorine(PTCSO) was synthesized by cationic ring opening polymerization of octamethyl cyclotetrasiloxane with silicon tetrachloride. FTIR and ~(29)Si NMR were used to characterize their structures and group ended titration was employed to determine number average relative molecular mass of the coupling agent. Fume silica modified by 6% PTCSO(based on mass of fume silica) was filled to reinforce silicone rubber. When 100 portion silicone rubber was filled with 40 portion( mass portion, based on silicone rubber) modified fume silica, the tensile strength was 9.9 MPa which was improved by 37.5% in comparing with silicone rubber reinforced by 40 portion unmodified fume silica. Tensile strength of silicone rubber filled with 60 portion modified fume silica reached a desired reinforcing effect of maximum 11.2 MPa. TEM images of the sample suggested that modified fume silica dispersed evenly in silicone rubber matrix with slight aggregation even if the filling amount went up to 60 portion.