低分子量丙烯酸—衣康酸共聚物的合成与性能研究

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关键词:丙烯酸.衣康酸共聚物合成分散剂衣康酸丙烯酸螯合力分散力
Abs仃act
Abstract
wim
flexible鼬ructure,controllable molecular weight and
as
high
steric effect,
as a
macromolecular dispersant

应条件,此时聚合得到的共聚物的综合性能最好,分散力最大可以达到 59.3mg。g~,螯合力最大可以达到312mg.g~。 (3)采用相转移法合成S,S’一二(q,伍’.甲基.伍”.乙酸)三硫代碳酸酯作为RAFT 链转移剂,分别合成了丙烯酸均聚物以及丙烯酸.衣康酸共聚物。并对聚合物的 分散力螯合力进行了测试,聚合物的综合性能优于普通自由基方法得到的聚合 物。其中,丙烯酸与衣康酸摩尔比1:4为单体最佳配比,此时聚合物的分散力达 到了76.3mg.g~,螯合力为412mg.茸1。
(3)The S,S’-(a,0c’-methyl—CI”一acetic acid)trithiocarbonate as transfer
agent was

RAFT chain PAA
synthesized
dispersion
by
phase
transfer method
chelating force
8.7mm2/s。在分散高岭土时,用普通自由基聚合方法得到的丙烯酸.衣康酸共聚 物在添加量为高岭土浆料的0.25%时即达到饱和值,此时高岭土浆料的运动粘度 最低为21.1mm2/s,使用RAFT的方法聚合得到的共聚物在添加量为0.15%即达
到最佳分散效果,运动粘度为16.2mm2/s。使用两种方法聚合得到的丙烯酸.衣康 酸共聚物用作碳酸钙、高岭土的分散剂,其分散效果均明显优于多聚磷酸钠。
itaconic acid was
polymerization.When the best molar ratio of acrylic acid 1:4,the dispersion force and chelating force of polymers
in two ways Was used
By Yanzhen
Wan
Spervisor:Prof.Qingxiang Zhao Materials
School of Materials Science and Engineering
May,2014
原创性声明
本人郑重声明:所呈交的学位论文,是本人在导师的指导下,独立进行研 究所取得的成果。除文中已经注明引用的内容外,本论文不包含任何其他个人
聚合反应的双键转化率;用乌氏粘度计测聚合物溶液的流出时间,采用一点法 算出聚合物的特性粘度;用滴定的方法表征聚合物的分散力和螯合力;用凝胶 渗透色谱(GPC)表征聚合物的分子量及其分布;用红外光谱分析聚合物的结构。 具体研究内容及结果如下: (1)采用普通的自由基溶液聚合反应时,对衣康酸单体进行半中和、丙烯
to
and containing two
copolymerize,used radical
chain
polymerization
Dolymerization acid.co.itaconic
and
reversible
for
addition-fragmentation the
synthesis of
transfer(RAFT) Poly(acrylic
酸单体中和处理,可以有效提高聚合反应的单体转化率,聚合物样品的综合性
能较其他方法处理单体的聚合物优异。 (2)在普通的自由基溶液聚合反应时,考察了反应时间、反应温度、引发
剂含量、单体配比对聚合反应的影响。在反应时间为3h、反应温度为80℃、引 发剂含量占单体总量(质量比)的6%、丙烯酸与衣康酸摩尔比为7:3为最佳反
new generation of dispersant is wiaely used
ceramic dispersant,aye dispersant,scale inhibitor,builder because its molecular weight
and
water treatment agent
to
obtain
and
Poly(AA-CO-L¨.The
force
and
of
polymers were
characterized,showing that the performance of polymers Was superior to that of
polymers
and
by general radical
摘要
(4)用两种方法合成的丙烯酸.衣康酸共聚物分别应用与制备碳酸钙和高岭 土浆料。用普通自由基聚合方法得到的丙烯酸.衣康酸共聚物在添加量为碳酸钙
浆料的0.3%(质量比)时效果最佳,即碳酸钙浆料的运动粘度最低为8.6mm2/s, 使用RAFT方法聚合得到的共聚物在添加量为0.2%即可达到最佳分散效果
或集体已经发表或撰写过的科研成果。对本文研究做出重要贡献的个人和集体, 均已在文中以明确方式标明。本声明的法律责任由本人承担。
学位论文作者:秀翘楚
日期:
2014年5月
学位论文使用授权声明
本人在导师指导下完成的论文及相关的职务作品,知识产权归属郑州大学。 根据郑州大学有关保留、使用学位论文的规定,同意学校保留或向国家有关部 门或机构送交论文的复印件和电子版,允许论文被查阅和借阅;本人授权郑州 大学可以将本学位论文的全部或部分编入有关数据库进行检索,可以采用影印、
bond conversion
to
effiux time
of polymer solution
to
was
detected by
an
ubbelohde
viscometer,which Was used
chelating force molecular
deduce
intrinsic viscosity of the
(1)When the ordinary
polymerization
was used
to
synthesize the
polymer,the monomer’S conversion Was improved by neutralizing acrylic acid and
itaconic acid with NaOH of the equimolar amount obtaining
efficient
green
macromolecular dispersant become
an
important task.In this paper,
resources
we used itaconic acid monomer belonging to biomass carboxyl functional groups and acrylic monomer
polymer.The
polymer permeation
and
dispersion force were characterized by
titration.The
by gel
weight
and
its
distribution
stllJctures of
were
characterized
chromatography(GPC).The
缩印或者其他复制手段保存论文和汇编本学位论文。本人离校后发表、使用学 位论文或与该学位论文直接相关的学术论文或成果时,第一署名单位仍然为郑 州大学。保密论文在解密后应遵守此规定。
学位论文作者:焉穗匙
日期:
2014年5月
摘要
摘要
大分子分散剂作为新一代分散剂,具有结构灵活、分子量可控、空间位阻 效应高,可以根据实际需要改变分子量和分子结构的特点,被广泛用作为陶瓷 分散剂、染料分散剂、阻垢剂、助洗剂、水处理剂以及炼钢用滑动水口润滑剂 的分散剂等。但是由于价格较高、单体来源局限、稳定性较差等缺点,限制了
它的应用,因此开发新型高效绿色环保的大分子分散剂成为目前的重要任务。 本文采用属于生物质资源、含有两个羧基官能团的衣康酸单体和丙烯酸单体进 行共聚,分别采用自由基溶液聚合以及可逆加成.断裂链转移聚合(m虹T)的方 法合成可生物降解的丙烯酸.衣康酸共聚物,有效提高了大分子分散剂的螯合力 和分散力。本论文考察了单体处理方式、引发剂浓度、反应温度、反应时间以 及单体配比对聚合反应的影响,采用溴化法测定聚合物的剩余双键含量,得出
transform
infrared found.The details were
as
the polymer was characterized by fourier

spectroscopy(FTIR).As
follows. radical
result,the best reaction condition was
time and monomer monomer,initiator concentration,reaction temperature,reaction
ratio in the process of the polymerization.The content of residual double bonds were measured、Ⅳitll brominated method to calculate double polymer.The
A dissertation submitted
Zhengzhou University
to
for the degree of
Master
Synthesis and Properties of Low
Molecular Weight acid)
Poly(acrylic
acid・—CO--itaconic
and molecular stmct山.e
can be
changed according to me
acnlal need.However,due to the higher price,limited monomer source,poor stability
and other shortcomings that limit its application,the development of new and
monomer
and the
molar ratio of the
acrylic acid
itaconic acid wwk.baidu.coms 7:3.Under this
condition,polymers had the most
outstanding comprehensive performance.The dispersion force and chelating force of polymers could be up to 59.3mg.g—and 3 12mg.g-1,respectively.
force
methods
biodegradable chelating
acid)(Poly(AA.CO.IA)),which improved dispersants,and
and
dispersion force of macromolecular
investigated the pretreatment of
under
ice—cooling,which made for
polymer with good performance in
the method of treating monomers.
Abstract
(2)Under
were
the general solution radical polymerization,a serious of polymers different reaction time,reaction temperature,initiator cogent these polymers,the optimum reaction condition
synthesized谢t11
and monomer was
as
ratio.Compared谢m
follows.The reaction time was 3h,the reaction temperature WS 80℃,the
initiator
content(mass ratio)was 6%of the total and
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