摘要
合成了丙烯酸核壳型室温自交联乳液。研究了反应性官能团质量分数、核层双官能团单体质量分数以及壳层厚度等因素对核壳乳液干膜交联度的影响。结果表明,当官能团M—A的质量分数达到3%时,交联度已经接近90%,继续增加M—A的比例并没有使交联度有明显的提高。壳层单体比例的增加相应地会使壳层厚度增加,进而会使涂膜的交联度有一定幅度的下降。当官能团M—A的质量分数为3%、壳层单体质量分数占40%、核层双官能团单体质量分数在1%时,是制备乳液的较佳条件。此条件下,核壳乳液干膜的拉伸曲线表现为橡胶性质,在-10℃～30℃的温度范围内,拉伸强度和断裂伸长率仅有微小的变化。
Core-shell structured acrylic latex self-crosslinkable at ambient temperature is prepared, The effects of reactive functional monomer mass concentration, double-functional monomer mass concentration in core and shell thickness on the crosslinking degree of dry latex film are investigated. The results show that 3% mass concentration of functional monomer M-A in core caused 90% crosslinking degree of dry film. Increasing M-A concentration will not increase the crosslinking degree obviously. Increasing shell thickness of core-shell latex by increasing of shell monomer＇ s proportion will result in the decrease of crosslinking degree to some extent. Latex film with elastomeric tensile property is prepared on the optimal condition of 3 % mass concentration of functional monomer M-A in core, 40% shell monomer＇ proportion,and 1% double-functional monomer mass concentration in core. The tensile strength and elongation at break of the above latex film will change slightly in the temperature range of - 10℃- 30℃。
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2005年第4期554-556,564,共4页
Journal of Materials Science and Engineering
基金
江苏省青年科技基金资助项目(BQ2000001)
关键词
自交联乳液
合成
交联度
拉伸力学性能
self- crosslinkable latex
synthesis
crosslinking degree
tensile property
