Page 207 - 精细化工2019年第8期
P. 207
第 36 卷第 8 期 精 细 化 工 Vol.36, No.8
201 9 年 8 月 FINE CHEMICALS Aug. 2019
粘合剂
烯基聚乙二醇嵌段共聚物的合成及室温固化
*
向 尧,雷永林
(西南科技大学 材料科学与工程学院,四川 绵阳 621000)
摘要:以聚乙二醇(PEG)为引发剂,三氟化硼乙醚(BF 3 •Et 2 O)络合物为催化剂,缩水甘油醚(GA)和烯丙
基缩水甘油醚(AGE)为共聚单体,通过阳离子开环聚合反应,制备了烯基聚乙二醇嵌段共聚物粘合剂
1
(PEG-PGA-PAGE)。采用红外光谱(FTIR)、核磁共振氢谱( HNMR)对产物的结构进行了表征,并以对苯二
腈氧化物为固化剂固化合成的粘合剂制备出弹性体。考察了 GA、AGE 分时间段加和同时加两种不同加料顺序
下合成的粘合剂(PEG-PGA-PAGE-1 和 PEG-PGA-PAGE-2)制备弹性体的力学和热性能。结果表明:粘合剂可
实现室温固化,GA、AGE 分段加制备的 PEG-PGA-PAGE-1 固化弹性体的力学性能和耐热性更强,其拉伸强度
可达 0.948 MPa,断裂伸长率可达 89.32%,邵氏硬度可达 23.8 Ha,储能模量可达 361.05 MPa,玻璃化转变温度
(T g )为–41.85 ℃,接触角为 74°。室温固化提高了弹性体的力学性能,有望应用于复合固体推进剂。
关键词:烯基聚乙二醇嵌段共聚物;室温固化;粘合剂;弹性体;对苯二腈氧化物
中图分类号:TQ316 文献标识码:A 文章编号:1003-5214 (2019) 08-1695-07
Synthesis and Room Temperature Curing of Allyl
Poly(ethylene glycol) Block Copolymer
*
XIANG Yao, LEI Yong-lin
(School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621000,
Sichuan, China)
Abstract: Allyl poly (ethylene glycol) block copolymer(PEG-PGA-PAGE) was synthesized by cationic
ring-opening polymerization using polyethylene glycol (PEG) as initiator, BF 3·Et 2O complex as catalyst,
glycidyl ether (GA) and allyl glycidyl ether (AGE) as monomers. The product structure was characterized
1
by FTIR and HNMR. The mechanical properties and thermal properties of two elastomers (PEG-PGA-
PAGE-1 and PEG-PGA-PAGE-2) prepared by curing binders prepared by adding GA and AGE separately
and simultaneously with terephthalonitrile oxide were investigated. The results showed that the binder can
cure at room temperature, the cured elastomer PEG-PGA-PAGE-1 prepared by subsection addition of GA
and AGE had better mechanical properties and thermal properties. Its tensile strength was 0.948 MPa,
elongation at break was 89.32%, shaw hardness was 23.8 Ha, storage modulus reached 361.05 MPa, T g was
–41.85 ℃, contact angle was 74°. Room temperature curing improved the mechanical properties, which is
expected to be used in composite solid propellants.
Key words: PEG-PGA-PAGE; room temperature curing; binder; elastomer; 1,4-p-phenylene dinitrile oxide
固体推进剂是固体火箭发动机的动力来源,在 为粘合剂,对苯二腈氧化物为固化剂,室温固化制
过去数年里,人们为改善固体推进剂中传统的端羟 备了聚异唑啉弹性体(弹性体为固体推进剂中粘
基聚丁二烯(HTPB)-异氰酸酯固化体系存在的固 合剂被固化剂固化后的成分),并研究了其力学性
化条件苛刻、对水敏感和固化温度高等问题进行了 能,结果表明,制备的聚异唑啉弹性体拉伸强度
[3]
大量研究 [1-2] 。本课题组前期采用聚丁二烯液体橡胶 最高可达 0.45 MPa,断裂伸长率最高可达 83% ;
收稿日期:2019-04-15; 定用日期:2019-06-14; DOI: 10.13550/j.jxhg.20190318
基金项目:中央军委装备发展部科研订购局领域基金(61407200202005)
作者简介:向 尧(1993—),女,硕士生。联系人:雷永林(1975—),男,副教授,E-mail:leiyonglin@163.com。