聚醚二醇钾盐引发D．L－丙交酯的开环聚合研究

以聚乙二醇－４０００钾盐为引发剂．合成了食不同长度聚醚链段的聚Ｄ．Ｌ－乳酸－聚乙二醇－聚Ｄ．Ｌ－乳酸（ＰＬＡ－ＰＥＧ－ＰＬＡ）三嵌段共聚物。考察了溶剂用量、引发剂用量、反应温度和时间、ＰＥＧ分子量、不同溶剂对聚合反应的影响。以１Ｈ－ＮＭＲ、ＩＲ、ＤＳＣ、ＧＰＣ对共聚物进行了表征。     

聚醚二醇钾盐引发D．L－丙交酯的开环聚合研究

以聚乙二醇－４０００钾盐为引发剂．合成了食不同长度聚醚链段的聚Ｄ．Ｌ－乳酸－聚乙二醇－聚Ｄ．Ｌ－乳酸（ＰＬＡ－ＰＥＧ－ＰＬＡ）三嵌段共聚物。考察了溶剂用量、引发剂用量、反应温度和时间、ＰＥＧ分子量、不同溶剂对聚合反应的影响。以１Ｈ－ＮＭＲ、ＩＲ、ＤＳＣ、ＧＰＣ对共聚物进行了表征。     

聚乙二醇二甲基丙烯酸酯／丙烯酰胺共聚物小球：一种有和于酶固定化的新型载

在本研究中，我们对用于酶固定新型载体聚惭二醇二甲基丙烯酸酯（ＥＧＤＭＡ丙烯酰胺（ＡＡｍ）做了评价，我们使用或不使用甲苯、分别通过对共聚单体的悬浮共聚合制备了具有不同膨胀度，平均直径大约为２００μｍ的两种不同类型的共聚物小球。使用过氧化苯（ＢＰＯ）作为引发剂，聚乙烯醇（ＰＶＡ）作为稳定剂。没有使用甲苯罅 的共聚物小球中无孔道，且不可膨胀。使用甲苯作为烯释剂制备的共聚物小球多孔且可膨胀（膨胀率为１４．     

自交联型SBS接枝共聚物的合成与粘接性能研究*

研究了在混合溶剂中了二烯－苯乙烯嵌段共聚物（ＳＢＳ）与丙烯酸丁酯（ＢＡ）、甲基丙烯酸甲酯（ＭＭＡ）及交联单体Ｎ－羟甲基丙烯酸胺（Ｎ－ＭＡＡ）进行四元接枝共聚的反应条件及其产物的粘接性能。讨论了引发剂浓度、交联单体用量、单体配比、反应时间及反应温度对接枝共聚物的影响。实验确定的最佳反应条件为：引发剂ＢＰＯ用量为ＳＢＳ用量的１．８％—２．２％；交联单体Ｎ－ＭＡＡ用量为ＳＢＳ用量的１６％—１．８％；ＢＡ／（ＢＡ＋ＭＭＡ）用量比为３５％；反应时间为３５—４．５ｈ；反应温度为８０—８５℃。用红外光谱对接枝共聚物进行了分析鉴定。性能测试显示出该四元接枝共聚物对聚氯乙烯、ＳＢＳ等难粘材料有较高的剥离强度。     

AA／AMPS共聚物水稳定剂的合成及性能研究

以丙烯酸（ＡＡ）、２－丙烯酰胺－２－甲基丙磺酸（ＡＭＰＳ）为原料,水为溶剂,过硫酸铵为引发剂,合成了ＡＡ／ＡＭＰＳ二元共聚物,研究了单体配比、反应温度、引发剂用量等与共聚物阻垢性能的关系,确定了最佳配比和工艺条件,并对产品的阻垢性能进行了评定。     

AA/AMPS共聚物水稳定剂的合成及性能研究

以丙烯酸（ＡＡ）、２丙烯酰胺２甲基丙磺酸（ＡＭＰＳ）为原料,水为溶剂,过硫酸铵为引发剂,合成了ＡＡ／ＡＭＰＳ二元共聚物,研究了单体配比、反应温度、引发剂用量等与共聚物阻垢性能的关系,确定了最佳配比和工艺条件,并对产品的阻垢性能进行了评定     

含磷丙烯酸—AMPS共聚物的合成及阻垢性能研究

以丙烯酸（ＡＡ）、２－丙烯酰胺－２－甲基丙磺酸（ＡＭＰＳ）和次亚磷酸钠为单体,水为溶剂,过硫酸铵为引发剂合成了含磷丙烯酸－ＡＭＰＳ共聚物阻垢分散剂（代号ＹＳＳ－９４）。讨论了单体配比、次亚磷酸钠用量、引发剂用量、反应温度及反应时间对共聚物阻垢性能的影响,确定了最佳配比和工艺条件,并对产品的阻垢分散性能进行了评价。结果表明,该共聚物是一种性能优异的高效水质稳定剂。     

MA-AMPS-AMPP共聚物的合成及其阻垢效果

以水为溶剂,过氧化物为引发剂,马来酸酐（ＭＡ）、２－丙烯酰胺－２－甲基丙基磺酸（ＡＭＰＳ）、２－丙烯酰胺－２－甲基丙基膦酸（ＡＭＰＰ）为单体合成了三元共聚物。探讨了该共聚物的阻垢效果及以聚合率与单体配比、引发剂用量和组成、反应温度、时间等之间的关系,并考察了水质条件变化对共聚物阻垢性能的影响。结果表明,该共聚物具有很好的阻ＣａＣＯ３垢和Ｃａ３（ＰＯ４）２垢能力。     

CR/SBS/CEVA-g-MMA/n-BMA胶粘剂的研制

以ＣＲ、苯乙烯丁二烯苯乙烯嵌段共聚物（ＳＢＳ）和氯化乙烯乙酸乙烯酯共聚物（ＣＥＶＡ）３种固体物料为接枝母体,以甲基丙烯酸甲酯（ＭＭＡ）和甲基丙烯酸正丁酯（ｎＢＭＡ）为接枝单体,在溶剂回流温度下,空气氛围中,以过氧化二苯甲酰（ＢＰＯ）为引发剂进行接枝共聚,制得了共混接枝共聚胶粘剂。此种胶粘剂的单体转化率、接枝率、初粘强度都有较大的提高,其广谱性能也有所改善。     

AA／AMPS二元共聚物的合成及阻垢性能研究

以水为溶剂,过硫酸铵为引发剂,丙烯酸（ＡＡ）,２－丙烯酰胺－２－甲基丙磺酸为原料,合成了ＡＡ／ＡＭＰＳ二元共聚物,探讨了单体配比,引发剂用量,反应温度等对共聚物阻垢性能的影响,并对其阻垢性能进行了评定。结果表明,ＡＡ／ＡＭＰＳ共聚物具有优异的阻碳酸钙垢和磷酸钙垢的性能。     

丙烯酸乙酯改性硅油的合成和性能研究

以含氢硅油(PHMS)和丙烯酸乙酯(EA)为原料,制得兼有二者性能的丙烯酸乙酯改性硅油。研究了PHMS含氢量和粘度对产品性能的影响,并用二元回归分析法进一步分析了PHMS含氢量和粘度与产品性能的关系。结果表明,PHMS含氢量对产品性能影响比其粘度显著,且PHMS含氢量和粘度越小,产品的性能越佳,其粘温系数为0.61,表面张力为21.2 mN/m。且二元回归方程分别预测了产品的粘度指数、粘温系数和表面张力,误差绝对值分别控制在7.411 8,0.009 1和0.095 3 mN/m内。     

Separation of organic solvent from dilute aqueous solutions and from organic solvent mixtures through crosslinked acrylate copolymer membranes by pervaporation

The composite membranes of acrylate polymers and porous substrate were prepared. The separation of the organic solvent–water mixtures and the organic solvent–organic solvent mixtures through these membranes by pervaporation was investigated. The acrylate copolymer membrane showed the organic solvent permselectivity for the separation of the organic solvent–water mixture, especially for the chlorinated hydrocarbon–water mixture separation. The high organic solvent permselectivity should be governed by solubility selectivity. The influence of the ester residue of acrylate on the phenol–water mixture separation was observed. The copolymerization of the macromonomers containing the polystyrene, poly(methyl methacrylate), and polydimethylsiloxane chain had a small effect on the separation of the chlorinated hydrocarbon–water mixture. High flux and low selectivity of organic solvent were observed in the case of the organic solvent mixture separation through the n-butylacrylate membrane. The difference of permeability of organic solvent was observed for the acrylate copolymer which has various structures of ester residue. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 69: 1483–1494, 1998     

Synthesis and structural characterization of methacrylic acid/octadecyl acrylate‐graft‐poly(methylhydrosiloxane) by hydrosilylation

Methylmethacrylate (MMA) and octadecyl acrylate (OA) were grafted to poly(methylhydrosiloxane) (PMHS) by hydrosilylation, respectively, with hexachloroplatinic acid as catalyst, and the former was further hydrolyzed to prepare methacrylic acid (MAA)‐graft‐PMHS under the alkaline condition. Through orthogonal experiment, main factors affecting the graft reaction between OA and PMHS were discussed and arranged in a decreasing order according to their abilities of the effect on the hydrosilylation of OA with PMHS: catalyst dosage, reaction temperature, reaction time, material ratio, and solvent dosage. It was found that the hydrosilylation of OA with PMHS was easier to that of MMA with PMHS. Under optimal conditions, the grafting ratios of MMA with PMHS and OA with PMHS reached about 90 and 95%, respectively. FTIR and ¹H NMR spectra indicated that the hydrosilylation reactions followed the Markovnikov's rule and played a strong preference toward β‐1,2‐addition. The test of contact angle indicated that surface energy of a system was mainly dependent on the polar groups. The surface energy of OA‐graft‐PMHS (35.07 mN/m) was similar to those of PMHS (35.62 mN/m) and polyoctadecyl acrylate (36.57 mN/m), and lower than that of MAA‐graft‐PMHS (43.50 mN/m). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2008     

含全氟壬烯基单体的合成与聚合

制备了1种含有全氟壬烯基的单体,与其他单体聚合得到含氟共聚物乳液.全氟壬烯(Ⅰ)和烯丙基(p-羟甲基苯基)醚(Ⅱ),在催化剂存在下得到含氟单体p-全氟壬烯基氧基苯酚烯丙基醚(Ⅲ)；以K2S2O8为引发剂,丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)和Ⅲ为共聚单体,采用乳液聚合的方法,制备了带蓝色荧光的含氟乳液.用傅立叶...     

高抗水水性丙烯酸酯乳液的合成、表征及其在工业滤纸中的应用

以十二烷基硫酸钠(SDS)和OP-10为复合乳化剂,丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)、甲基丙烯酸十二氟庚酯(FA)为主要原料,采用预乳化半连续种子聚合法制备具有核壳结构的高抗水性丙烯酸共聚乳液。利用红外光谱、扫描电子显微镜、透射电子显微镜、接触角仪等对乳液及浸渍滤纸进行了表征;同时,讨论了核壳单体配比、乳化剂用量、引发剂用量以及含氟单体用量对反应与浸渍滤纸耐水性能的影响。结果表明,优化反应条件后,硬单体MMA配以适量FA单体为壳,制备的共聚乳液稳定性好,粒度均匀,具有明显球状和核壳结构。乳胶膜表面能随着含氟量的增加大幅度降低,当氟单体含量为16.3%时,其表面能降至19.9 m N/m。利用功能氟单体包覆于核层外表,当氟单体含量为4.7%时,原乳胶表面能从37.7 m N/m降至24.6 m N/m,所浸渍滤纸耐水性能明显优于不含氟乳液浸渍滤纸,达到"低氟高效"的效果。     

甲基丙烯酸丁酯-PEG梳形共聚物的合成与表征

以偶氮双异丁腈(AIBN)为引发剂,四氢呋喃为溶剂,采用甲基丙烯酸正丁酯(BMA)与聚乙二醇单甲醚甲基丙烯酸酯(POEM)共聚制备了支链上含聚乙二醇(PEG)的梳形共聚物。采用1H-NMR、DSC和表面接触角等方法研究了梳形共聚物的结构与性能。结果表明,聚合物中两结构单元的含量与单体投料比中的含量基本一致;投料比对聚合物的结构和性能有较为显著的影响;梳形聚合物的熔点、焓值及静态接触角随着共聚物中BMA含量的升高而升高。     

Synthesis, characterization, and properties of a novel acrylic terpolymer with pendant perfluoropolyether segments

A novel acrylic terpolymer with pendant perfluoropolyether (PFPE) segments has been synthesized and fully characterized. By hexamethylene diisocyanate functional groups PFPE monofunctional macromonomers have been grafted on a poly(butyl methacrylate-co-hydroxyethyl acrylate-co-ethyl acrylate) random terpolymer. Such grafted copolymer behaves like an interface-active material, since the perfluoropolyether segments in solvent cast films rearrange themselves at the air-polymer interface by surface segregation. In addition, blends of the above graft copolymer with acrylic base polymers (either the terpolymer itself or a commercial copolymer) have been examined in terms of surface segregation and fluorine enrichment of the external layers.The critical surface tension, γ_c, of solid films made of the neat graft copolymer as well as of the polymer blend has been evaluated by contact angle measurements and Zisman plots. Even a small addition (5 wt%) of the fluorinated copolymer to the acrylic component has been found very effective in lowering the surface tension. The outermost surface composition has been investigated by XPS technique, confirming the strong fluorine enrichment. Furthermore, SEM and EDX analyses have been performed on cross-sectioned films, showing that in the above polymer blends macrophase surface segregation has originated a thick layer made of fluorinated copolymer close to the air-polymer interface.     

两亲性无规共聚物MAA-SMA-PEGMA的表面活性研究

利用功能性单体甲基丙烯酸(MAA)、甲基丙烯酸十八烷基酯(SMA)和聚乙二醇甲基丙烯酸酯(PEG-MA)通过自由基共聚,合成了两亲性共聚物Poly(MAA-SMA-PEGMA)。研究了其结构、临界胶束浓度(CMC)和表面张力,探讨了由共聚物与低分子表面活性剂组成的复配体系。结果表明高低分子表面活性剂复配体系在质量比为5∶5后,体系的表面张力和临界胶束浓度都有所降低,接近于低分子表面活性剂。     

Surface modification of poly(propylene) by photoinitiators: Improvement of adhesion and wettability

Different benzophenone‐type photoinitiators were photografted onto poly(propylene) (PP). The polymer surfaces were analyzed by means of contact angle measurements, UV spectroscopy, and FTIR‐ATR. The modified samples showed a better wettability and higher surface energies, increasing from 26 mN/m for pure PP to 36 mN/m for the modified samples. The UV spectrum of the modified PP films showed two absorption bands that could be related to the grafted initiator. The effect of irradiation time and photoinitiator concentration was investigated. Different acrylates were grafted efficiently onto the modified polymer surfaces. FTIR‐ATR and contact angle measurements confirmed the presence of the grafted chains. The surface energy of the grafted surfaces of samples increased to 70 mN/m, depending on the type of acrylate used. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 2341–2350, 2004     

Design of novel poly(methyl vinyl ether) containing AB and ABC block copolymers by the dual initiator strategy

A new set of block copolymers containing poly(methyl vinyl ether) (PMVE) on one hand and poly(tert-butyl acrylate), poly(acrylic acid), poly(methyl acrylate) or polystyrene on the other hand, have been prepared by the use of a novel dual initiator 2-bromo-(3,3-diethoxy-propyl)-2-methylpropanoate. The dual initiator has been applied in a sequential process to prepare well-defined block copolymers of poly(methyl vinyl ether) (PMVE) and hydrolizable poly(tert-butyl acrylate) (PtBA), poly(methyl acrylate) (PMA) or polystyrene (PS) by living cationic polymerization and atom transfer radical polymerization (ATRP), respectively. In a first step, the Br and acetal end groups of the dual initiator have been used to generate well-defined homopolymers by ATRP (resulting in polymers with remaining acetal function) and living cationic polymerization (PMVE with pendant Br end group), respectively. In a second step, those acetal functionalized polymers and PMVE-Br homopolymers have been used as macroinitiators for the preparation of PMVE-containing block copolymers. After hydrolysis of the tert-butyl groups in the PMVE-b-ptBA block copolymer, PMVE-b-poly(acrylic acid) (PMVE-b-PAA) is obtained. Chain extension of the AB diblock copolymers by ATRP gives rise to ABC triblock copolymers. The polymers have been characterized by MALDI-TOF, GPC and ¹H NMR.