聚乙烯基大分子偶联剂的合成及对超高分子量聚乙烯/多壁碳纳米管复合材料耐磨性能的影响  

Synthesis of Polyvinyl Macromolecular Coupling Agent and Its Effects on Wear Behavior of UHMWPE/MWNT Composites

作　　者：何腾飞[1] 丁永红[1] 李夏倩[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213000

出　　处：《高分子材料科学与工程》2016年第10期49-55,共7页Polymer Materials Science & Engineering

基　　金：江苏省产学研联合创新资金--前瞻性联合研究项目(BY 2013024-15)

摘　　要：通过酰溴化反应将端羟基聚乙烯(PE-OH)转化成聚乙烯大分子引发剂,引发γ-甲基丙烯酰氧基丙基三甲氧基硅烷(MPS)的原子转移自由基聚合,通过红外光谱、核磁氢谱分析表明成功合成了一种聚乙烯基大分子偶联剂——聚乙烯/聚γ-甲基丙烯酰氧基丙基三甲氧基硅烷嵌段共聚物(TRCZ)。将TRCZ加入到超高分子量聚乙烯(UHMWPE)/多壁碳纳米管(MWNT)复合体系中,考察其对复合体系性能的影响。结果表明,添加了MWNT用量4%的大分子偶联剂TRCZ-D,复合体系的拉伸强度比未添加偶联剂和添加了小分子偶联剂的复合体系分别提高了32.8%和17.2%,且复合体系的摩擦因素和磨损率比纯UHMWPE和未添加偶联剂的复合体系分别降低了37.6%和21.9%,这是由于TRCZ的加入改善了UHMWPE、MWNT两相间的相容性。Firstly,polyvinyl macromolecular initiator was prepared through chain end group reaction of a-hydroxylpolyethylene（ PE-OH）. Afterwards,γ-methacryloxypropyltri-methoxy silane（ MPS） was initiated with polyvinyl macromolecular initiator,and polyvinyl macromolecular coupling agents TRCZ was successfully synthesized via atom transfer radical polymerization. The structures and compositions of TRCZ were studied by 1H-NMR and FT-IR. TRCZ was added to ultra-high molecular weight polyethylene（ UHMWPE） / multi-walled carbon nanotubes（ MWNT） composites,and the effects of TRCZ on properties of UHMWPE / MWNT composite materials were discussed. Results show that macromolecular coupling agent TRCZ-D makes the tensile strength of composite separately increase by 32. 8% and 17. 2% than the non-coupling agent and adding a micromolecule coupling composite respectively,and it makes the friction coefficient and the wear rate of the composite reduce by 37. 6% and 21. 9% than pure UHMWPE and the non-coupling agent composite respectively,it is the cause of TRCZ improving the compatibility of UHMWPE and MWNT.

关 键 词：大分子偶联剂 超高分子量聚乙烯 多壁碳纳米管 耐磨性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]