摘要
研究了羟甲基化木质素用量对PVC/NBR热塑性弹性体结构与性能的影响。结果表明:在100份(质量,下同)PVC/NBR中加入30份羟甲基化木质素时产物的综合性能最佳,拉伸强度25.6MPa,扯断伸长率520%,邵尔A型硬度77,撕裂强度72.7kN/m;耐老化性能在羟甲基化木质素用量低于30份时较好;随着羟甲基化木质素用量增加,产物的耐油性能显著提高。动态粘弹分析证实羟甲基化木质素与PVC和NBR有较强的结合力,并且提高了PVC和NBR两相间的相容性。TEM观测发现木质素可在材料中形成第二个连续相,从而与基质构成互穿聚合物网络。
The influences of lignin-resin (treated with formaldehyde) on the structure and properties of PVC/NBR thermoplastic elastomers were studied. When the lignin-resin was 30 phr, the properties were the best and the tensile strength, elongation at break, Shore A hardness and tear strength were 25.6 MPa, 520%, 77 and 72.7 kN/m respectively. Hot-air aging experiment showed that less content of lignin-resin (less than 30 phr) could increase enduring aging capability of PVC/NBR. Hot-oil resistance enhanced with the increase of lignin loading amount: Dynamic property indicated that lignin-resin had good compatibility with PVC/ NBR, which improved the compatibility between PVC and NBR. TEM photos showed that lignin-resin shaped a second continuous phase, and formed a kind of IPN material with the matrix.
出处
《合成橡胶工业》
EI
CAS
CSCD
北大核心
2001年第6期358-360,共3页
China Synthetic Rubber Industry
关键词
聚氯乙烯
丁腈橡胶
羟甲基化木质素
热塑性弹性体
互穿聚合物网络
Aging of materials
Formaldehyde
Hardness
Interpenetrating polymer networks
Lignin
Polyvinyl chlorides
Resins
Tensile strength
