玻纤网格布用有机硅改性聚丙烯酸酯乳液的制备
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
玻璃纤维网格布具有耐高温、强度高、比重轻、吸湿低及延伸小等优异特性,使其在建筑方面的应用日益增多,但是玻璃纤维网格布容易受到水泥中碱性介质的浸蚀,而使网布的强度下降。通过改变玻璃纤维的化学成分可以增加其耐碱率,但这种方法会加大成本;在网布的表面涂上高分子涂层可以提高网布抗碱腐蚀和承受复杂应力的能力。目前织物涂层普遍存在强度低、易腐蚀、手感差、涂层表面易粘连等缺点,不能很好地满足工业上的要求。针对这些缺点,本文采用核壳乳液聚合的方法合成了一种玻璃纤维网格布用耐碱涂层,在丙烯酸酯壳层聚合物分子链上引入有机硅偶联剂,利用硅烷偶联剂使共聚物产生一定程度交联,从而有效地克服了传统乳液涂层中存在的耐碱性能差这一缺陷。此外,在偶联剂交联基础上,又在壳层共聚物分子链上引入一定数量的支化型有机硅MATS,进一步提高共聚物膜的表面疏水性能,降低其吸水率。论文的主要研究内容有:
     通过核壳乳液聚合的方法,并引入有机硅偶联剂进行共聚,制备了具有较好的柔软性、不粘连、强度高、耐碱保留率高的乳液涂层,满足了产品工业化应用的性能要求。
     研究了单体配比、核壳比、乳化剂用量、N-羟甲基丙烯酰胺及有机硅偶联剂用量等工艺参数对产品性能的影响,确定制备乳液的最佳工艺条件为:核、壳的Tg分别为-40℃和20℃,壳/核为5:4,核、壳层N-羟甲基丙烯酰胺用量分别为为1.5%和3.0%,核层KH-570用量为6.0%,制得的乳液涂层各项性能较好。
     利用红外光谱(FT-IR)对共聚物结构进行了表征,确认有机硅与丙烯酸酯发生了共聚;共聚物胶膜DSC测试结果表明,有机硅的用量较大时聚合物的核和壳的Tg分别为-39℃和24℃,较理论值有所偏高;利用透射电子显微镜(TEM)观察改性聚丙烯酸酯胶膜,确认成功制备出了具有典型核壳结构的有机硅改性聚丙烯酸树脂。
     合成了具有支化结构的高硅含量反应性有机硅单体甲基丙烯酰氧基丙基三(三甲基硅氧基)硅烷(MATS),并用1H-NMR、FT-IR对其结构进行了表征。以γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)为交联单体以具有支化型大体积疏水基团的有机硅单体MATS为功能单体同丙烯酸酯单体进行壳层共聚,合成了稳定的交联型高硅含量硅丙乳液。MATS的加入使得有机硅改性聚丙烯酸酯聚合物的耐水性和粘结力有所提高;聚合物交联度减小,网布耐碱强度保留率降低。
Fiberglass mesh had good properties such as high temperature resistance,high strength, low density and so on. So more and more fiberglass mesh were applied in architecture,but the mesh was corrupted by alkali from cement and the strength of fiberglass was poor.By changing the chemical dosage of fiberglass mesh,the alkali resistance could be enhanced,but it made the cost too high.It could improve the abiility of alkali resistance and strength of fiberglass mesh by coating the mesh with em emulsion polymer.Most of the coating were poor strength,easy corroding,bad handle,tackiness and others defects.In this paper,an alkali resistant emulsion binder was prepared by core-shell polymerization and introducing an alkoxysilan to copolymerize with shell polymer.crosslinking agent KH-570 was used to correct these shortcomings in conventional emulsion.A stable copolymer emulsion with high MATS content was prepared by seeded semibatch emulsion polymerization.The hydroscopici -ty of the films of the latexes were tested.The branched large group of MATS can effectivel decrease the surface energy of the films,provide the copolymer excellent water-resistance. Results were as follows:
     A coating binder was prepared by core-shell polymerization and an organosilicon coppler was copolymerized in it.The emulsion coating had good properties such as softness,ad -hesive resistance,high strength,alkali resistance and was satisfied with the property of product.
     The performance of the coating binder is mainly influenced by the Tg of core polymer and shell polymer,the ratio of core polymer to shell polymer, the dosage of NMA,the dosage of emulsifiers,the dosage of KH-570.The best technology conditions were as follows:Tg of core polymer-45℃,Tg of shell polymer 20℃,the ratio of shell polymer to core polymer dosage of NMA in core polymer about 1.5%,dosage of KH-570 6.0%,dosage of emulsifiers 3.0%.
     Alkoxysilane and acrylate were polymerized by means of FT-IR andspectra;The results of DSC tests showed the Tg of the core polymer and shell polymer were -39℃and 24℃, slightly higher than numerical value in theory for the alkoxysilan; By TEM observation,the polymer with core-shell structure was prepared.
     Stable copolymer emulsions with high silicon content were prepared by seeded semibatch emulsion polymerization,in which KH-570 acted as a crosslinker and MATS [γ-methacryloxy -propyl tris-(trimethylsiloxy)silane] was used as a reactive organosilicon monomer with branched Si-O-Si groups.The properties of the copolymer latex were measured.The property of the water-resistance and adhesive joint strength were improved which crosslinking rate and alkali resistant keeping rate of fiber glass mesh were reduced.
引文
1.危良才.我国玻璃纤维工业生产技术发展趋势[J].云南建材,2001,4:16—20
    2.姜肇中,高建枢,王惟峰.玻璃纤维的发展和应用[J].玻璃钢/复合材料,1997, 6:5—10
    3.刘泽黎.耐碱玻璃纤维制品的研制[J].玻璃纤维,1997,6:9—12
    4.边天佑.耐碱玻璃纤维和GRC制品的现状与发展趋势[J].玻璃纤维,1998,5:16—20
    5.刘泽黎.耐碱玻璃纤维制品的研制[J].玻璃纤维,1997,6:9—12
    6. H.瓦尔森,C.A.芬奇.合成聚合物乳液的应用(第3卷)[M].曹同玉等译.北京:化学工业出版社,2004:179—214
    7.徐祖顺,易吕凤,肖卫东.织物用胶粘剂及粘接技术[M].北京:化学工业出版社,2004
    8. Philip L Schell.Polyamide and acrylic polymer coated glass fiber reinforcements, reinforc -ed polymeric composites and a method of reinforcing a polymeric material[P].US580431 3,1998
    9. Mankell Kurt O,Noone Michael J,Tessari Domenic J.Hydrophobic, anti-microbial insulati -on products and a hydrophobic, anti-microbial coating composition for preparing the sa -me[P].W049981 A2,2002
    10. Momotake,Hiroyuki,Kadota Toshiya.Glass fiber for reinforcing rubber[P].JP244785,2004
    11.肖利明,赵建国,杨永社.新型玻璃纤维浸润剂合成技术[J].河北师范大学学报,1996,20 (2):72—75
    12. Owens-Corning Fiberglass Coip.Method and compositions for coating glass fibers[P].GB 892091,1960
    13. Helbing Clarence.Fiber glass binder compositions and process there of[P].W060043,1999
    14. Okamura Akinobu,Hamaguchi Takuo,Akiyama Mitsuharu.Treatment for rubber-reinforci -ng fibers,reinforcing fibers,and reinforced rubbers[P].EP0943725A1,1999
    15. Sugano Naoto,Kobue Kazuyuki.Water-dispersed coating agent for glass fiber,glass fiber bundle coated therewith and glass fiber-knitted/braided material[P].JP294448,2001
    16. Katsuji Matsuura,Kamagaya,Kunihito Arai. Process for treating the surface of glass fibre to impart resistance to alkalis [P].US4188421,1980
    17. Karlis L.Jaunarajs, Littleton colo. Alkali resistant glass article and method of preparation [P].US4272294,1981
    18. Chou Shen,Lin Ling-Shiou,Yeh Jen-Taut.Effect of surface treatment of glass fibres on ad -hesion to phenolic resin[J].Polymers and Polymer Composites,1999,7(1):21—31
    19. Helmut M,Mainz G. Process for increasing resistance of glass product to cement andcementitious mixtures thereof [P].US4013478,1977
    20. Hiromu Ueda,iroshi Fujii,Masaharu Hayashi.Resin-covered alkali-resistant glass fibers[P] GB2232988,1991
    21.钱世淮.玻璃纤维涂层织物[J].玻璃纤维,1998,5:44—44
    22.杨卫疆,郑安呐,戴干策.玻璃纤维专用聚醋酸乙烯醋乳液的研制[J].中国胶粘剂,1996,5(6):14—15
    23.黎涛,杨春亮,黎志平.环氧化天然胶乳用于玻纤增强水泥基布处理[J].弹性体,1998,8(4):24—26
    24.程军.玻纤网格布用耐碱胶的研制[J].玻璃纤维,2000,4:9—10
    25.高杜梅.抗碱玻璃纤维网布的研制和应用[J].玻璃纤维,2000,2:9—10
    26. Yonekawa Yoshiaki,Hiraharu Akio,Ikeda Yorinobu,et al.Water and weather-resistant acryl -ic siloxane emulsion coating compositions for concrete[P].Jpn Kokai Tokkyo Koho,JP05 28734,1993
    27.邬润德,童筱莉,周安安,等.有机硅氧烷原位接枝丙烯酸酯树脂研究[J].涂料工业,1999,5:5—8
    28. Chenm J,Osterholtz F D,Pohier,et al. Silane in high-solids and waterborne coating[J].J Co at Tech,1997,69(870):43—51
    29. Dan Donescu,Mircea Teodorescu,Sever Serban,et al. Hybridmaterials obtained inmicroe -musion from methylmethacryl,methacryloxy propyltrime-thoxysilane,tetraet hoxysilane [J].European Polymer Jounal,1999,35(9):1679—1686
    30. Ktlim,S E Webber,K P Johnston.Synthesis and characterization of poly(dimethyl siloxane) -poly[alkyl(meth)acrylicacid]blockcopolymers[J].Macromolecules,1999,32(9):2811—2815
    31.赵培真,阐成友,朱晓丽,等.聚丙烯酸酯-聚有机硅氧烷复合乳液的合成与性能[J].合成橡胶工业,1998,21(4):217—220
    32.黄世强,彭慧,李盛彪,等.含氢聚甲基硅氧烷/丙烯酸丁酯/羟甲基丙烯酸酰胺复合乳液的研究-原料配比对乳液及胶膜性能的影响[J].高分子学报,1998,12(6):692—697
    33.彭慧,黄光佛,鲁秦,等.有机硅复合乳液聚合的动力学特征和成核机理[J].功能高分子学报,2000,13(2):173—176
    34.刘祥,范晓东,罗焕.核-壳型有机硅/丙烯酸酯共聚复合乳液的合成与表征[J].高分子材料科学与工程,2005,21(2):173—176
    35.龚兴宇,范晓东.有机硅-丙烯酸酯共聚复合乳液的结构、形态及性能[J].高分子材料科学与工程,2004,20(2):140—143
    36.孟勇,翁志学,单国荣,等.聚硅氧烷/甲基丙烯酸甲酯核壳结构复合粒子的制备[J].应用化学,2004,21(2):169—173
    37.孟勇,翁志学,单国荣,等.聚硅氧烷/丙烯酸酯核/壳复合胶乳的粒径分布与成核机理[J].高分子学报,2004(3):367—371
    38.于雄,王莹,张鹏.半连续法在制备有机-有机核壳型复合乳液中的研究进展[J].化学工程师.2006(8):18—20
    39.黄光速,李可友.有机硅-丙烯酸酯共聚乳液的合成[J].弹性体.1994,4(2):6—8
    40.程时远,闫翠娥,马世安,李建宗.乳化剂对复合胶粒核-壳结构的影响[J]高分子材料科学与工程,1996,12(5):128—131
    41.焦剑,雷渭媛.高聚物结构、性能与测试[M].北京:化学工业出版社,2003:106—112
    42.袁才登.乳液胶黏剂[M].北京:化学工业出版社,2003:276—283
    43.刘德峥.种子乳液共聚法制备含氢聚甲基硅氧烷/丙烯酸酯织物涂层[J].精细石油化,2002,1:48—52
    44.刘德峥.种子乳液共聚法制备含氢聚甲基硅氧烷/丙烯酸酯织物涂层[J].精细石油化,2002,1:48—52
    45.胡小玲,岳红,管萍等.丙烯酸酯乳液压敏胶的研制[J].化学研究与应用,1999,11(1):32—36
    46.张爱波,焦剑,林起浪.高粘度丙烯酸酯共聚乳液的合成[J].陕西化工,2000,29(2):20—28
    47.张东亮,张新兵,俞进见.室温交联丙烯酸酯核壳乳胶的合成及成膜性能[J].江苏石油化工学院学报,2000,12(4):11—14
    48.吴跃焕,王金红,杨卓如.苯乙烯-丙烯酸酯类乳液在涂料中的应用与发展[J].化学建材,2002,5:22—25
    49.刘方方,孙立明,牛魁哲,卢义和,康义.聚合物乳液交联的方法[J].河北化工,2001,1:7—9
    50.张爱波,焦剑,林起浪.高粘度丙烯酸酯共聚乳液的合成[J].陕西化工,2000,29(2):20—28
    51.汪地强,刘白玲,胡杰.有机硅改性聚丙烯酸酯聚合物研究进展[J].皮革科学与工程,2002,12(6):33—41
    52.曹同玉,刘庆普,胡金生.聚合物乳液合成原理、性能及应用[M].第二版.北京:化学工业出版社,2007:120—173
    53.陈旭东,高翩,吴忠辉等.多层核壳结构ACR树脂的合成与性能研究Ι.乳化剂对ACR乳液聚合反应及PVC/ACR共混物性能的影响.中山大学学报(自然科学版),2001,40(2): 50—53
    54.山下晋三,金子柬助.交联剂手册[M].北京:化学工业出版社,1990
    55.段洪东,李鹏,徐桂云.有机硅偶联剂对丙烯酸酯胶粘剂粘接作用的研究[J].中国胶粘剂,1999,9(3):15—17
    56.侯有军,任力,种幸荣等.室温交联型硅内微胶乳的合成研究*(1)硅烷单体对聚合稳定性和胶膜性能的影响[J].高分子交联与吸附,2003,19(1):1—8
    57. Chou Shen,Lin Ling-Shiou,Yeh Jen-Taut.Effect of surface treatment of glass fibreson adh -esion to polypropylene resin[J].Polymers and Polemer Composites,2000,8(2):131—138
    58.龚兴宇,解云川,张乾等.高硅烷含量硅丙复合乳液的性能及应用研究[J].涂料工业,业,2002,5:6—9
    59.何曼君,陈维孝,董西侠.高分子物理[M].修订版.上海:复旦大学版社,1990:253—255
    60. Shoichiro Yano,,Keisuke Iwata,Kimio Kurita.Physical properties and structure of organic- inorganic hybrid materials produced by sol-gel process[J]. Mater Sci Eng(C) ,1998, 6:75—90
    61.唐敏锋,范晓东,王召娣,等.新型支化有机硅单体的合成及其硅丙乳液的研究[J].高分子材料科学与工程,2006,22(1):44—47

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700