三羟甲基丙烷单丙烯酸二己酸酯改性硅油

吉林大学的王秀玲等人将三羟甲基丙烷和苯甲醛在对甲苯磺酸催化下、在二氯甲烷溶剂中反应,得到白色苄基保护的三羟甲基丙烷固体;再与丙烯酰氯在三乙胺催化下、在二氯甲烷溶剂中反应,得到苄基保护的丙烯酸酯;在甲醇/盐酸体系中水解,得到三羟甲基丙烷单丙烯酸酯;然后与己酰氯在三乙胺催化下、在四氢呋喃溶剂中反应,制得三羟甲基丙烷单丙烯酸二己酸酯;最后,与含氢硅油（硅氢基质量分数0.09%,黏度700 mPa·s）在氯铂酸催化下、在甲苯溶剂中进行硅氢加成反应,得到淡黄色、透明的Si—C型长链烷基酯改性硅油——三羟甲基丙烷单丙烯酸二己酸酯改性硅油。     

UV固化-肪族环氧六丙烯酸酯的合成与性能研究

采用丁二酸酐、三羟甲基丙烷二丙烯酸酯在催化剂的作用下进行开环反应制得中间体,然后再与三羟甲基丙烷三缩水甘油醚反应,制得脂肪族环氧六丙烯酸酯,并对其在UV涂料中的应用性能进行了研究。     

UV固化脂肪族环氧六丙烯酸酯的合成与性能研究

采用丁二酸酐、三羟甲基丙烷二丙烯酸酯在催化剂的作用下进行开环反应制得中间体,然后再与三羟甲基丙烷三缩水甘油醚反应,制得脂肪族环氧六丙烯酸酯,并对其在UV涂料中的应用性能进行了研究。     

一种基于双三羟甲基丙烷的4官能度聚氨酯丙烯酸酯及其制备方法和应用

<正>一种基于双三羟甲基丙烷的4官能度聚氨酯丙烯酸酯及其制备方法和应用。本发明公开了一种低粘度4官能度聚氨酯丙烯酸酯,通过如下方法制备得到:先由双三羟甲基丙烷在催化剂作用下与环氧乙烷或环氧丙烷反应而制得四羟基聚醚,四羟基聚醚再与异氰酸酯丙烯酸乙酯反应制得4官能度聚氨     

智能卡制备中PETG预涂膜的性能研究

以六亚甲基二异氰酸酯(HDI)、聚碳酸酯二醇(PCDL)、聚四氢呋喃二醇(PTMG)、甲基丙烯酸β羟乙酯（HEMA）、二羟甲基丙酸（DMPA,2,2二羟甲基丙酸）等为基本原料,制备出聚对苯二甲酸乙二醇酯1,4环己烷二甲醇酯(PETG)预涂膜用涂层。利用红外光谱仪和扫描电子显微镜等测试设备对预涂膜进行表征,并研究了涂层中不同原料对PETG预涂膜热覆合性能的影响。结果表明,使用水合肼后扩链,增加聚醚二醇和丙烯酸酯的量,PETG预涂膜活化温度更低,剥离强度最优。     

脂肪族环氧四丙烯酸酯的合成及其在UV涂料中的应用

采用丁二酸酐、三羟甲基丙烷二丙烯酸酯在催化剂的作用下进行开环反应得中间体,然后再与新戊二醇二缩水甘油醚反应制得脂肪族环氧四丙烯酸酯,并且对其在UV涂料中的应用性能进行了研究。     

指甲油用水性聚氨酯-丙烯酸酯复合乳液的制备与性能

选用异佛尔酮二异氰酸酯、聚醚二元醇、二羟甲基丙酸、1.4-丁二醇、三羟甲基丙烷、甲基丙烯酸甲酯、功能性单体等为原料,采用阴离子自乳化法合成了指甲油用水性聚氨酯-丙烯酸酯复合乳液。该复合乳液完全满足当前对水性指甲油的要求。     

三羟甲基丙烷酯类的制备研究进展

介绍了近期三羟甲基丙烷酯类的合成研究现状,主要包括三羟甲基丙烷的油酸酯、丙烯酸酯、辛酯、聚氨酯、有机酸酯和混合酸酯的合成方法。比较了一步合成法、二步合成法和酯交换合成法。对三羟甲基丙烷酯类按功能应用进行了归类整理。     

植物油改性水性聚氨酯涂料的研制

采用气干性植物油与三羟甲基丙烷(TMP)醇解的产物,代替传统的聚酯聚醚多元醇与甲苯二异氰酸酯(TDI)和二羟甲基丙酸(DMPA)反应,然后用三乙胺中和,再用水稀释,制得自乳化的植物油改性水性聚氨酯(俗称氨酯油)乳液。用该水性氨酯油乳液制备了性能优良的水性聚氨酯木器涂料,并对影响乳液性能的多种因素进行了探讨。     

水性聚氨酯皮革涂饰剂的研制

以聚氧化丙烯二醇,聚己二酸己二醇酯,异佛尔酮二异氰酸酯等合成水性聚氨酯皮革光亮剂。研究结果表明,当聚酯和聚醚的比例为2：1,交联剂三羟甲基丙烷用量为1．5％时,能制得性能优异的水性聚氨酯皮革光亮剂。     

Investigation of liquid crystalline and photocrosslinkable poly[4‐x‐phenyl‐4′‐(m‐methacryloyloxyalkyloxy)cinnamate]s

Three series of liquid‐crystalline‐cum‐photocrosslinkable polymers were synthesized from 4‐x‐phenyl‐4′‐(m‐methacryloyloxyalkyloxy)cinnamates (x = ? H, ? OCH₃ and ? CN; m = 6, 8 and 10) by free radical solution polymerization using azobisisobutyronitrile as an initiator in tetrahydrofuran at 60 °C. All the monomers and polymers were characterized using intrinsic viscosity, and FTIR, ¹H NMR and ¹³C NMR spectroscopy. The liquid crystalline behavior of these polymers was examined using a hot stage optical polarizing microscope. All the polymers exhibited liquid crystalline behavior. The hexamethylene spacer‐containing polymers exhibited grainy textures; in contrast, the octamethylene and decamethylene spacer‐containing polymers showed nematic textures. Differential scanning calorimetry data confirmed the liquid crystalline property of the polymers. Thermogravimetric analysis revealed that all the polymers were stable between 236 and 344 °C in nitrogen atmosphere and underwent degradation thereafter. As the methylene chain length increases in the polymer side‐chain, the thermal stability and char yield of the polymers decrease. The photocrosslinking property of the polymers was investigated using the technique of exposing the polymer solution to UV light and using UV spectroscopy. The crosslinking reaction proceeds via 2π–2π cycloaddition reactions of the ? CH?CH? of the pendant cinnamate ester. The polymers containing electron‐releasing substituents (? OCH₃) showed faster crosslinking than the unsubstituted polymers and those containing electron‐withdrawing substituents (? CN). Copyright © 2007 Society of Chemical Industry     

Biodegradable poly(ester amide)s – A remarkable opportunity for the biomedical area: Review on the synthesis,characterization and applications

Poly(ester amide)s have emerged in the last years as an important family of biodegradable synthetic polymers. These polymers present both ester and amide linkages in their structure and they gather in the same entity the good degradability of polyesters with the good thermo-mechanical properties of polyamides. Particularly, poly(ester amide)s containing α-amino acids have risen as important materials in the biomedical field. The presence of the α-amino acid contributes to better cell–polymer interactions, allows the introduction of pendant reactive groups, and enhances the overall biodegradability of the polymers.     

Tuning the mechanical properties of UV coatings towards hard and flexible systems

The standard resins of radiation-curable coatings provide either hard or flexible coatings dependent on the type of chemistry used. Whereas aromatic epoxide acrylates usually give hard and brittle coatings, urethane acrylates are known for their flexibility. Since the radiation curable systems should not contain solvents, the desired low viscosity for the specific application is adjusted with reactive monomers. This normally prevents the use of flexible high-molecular-weight polymers. On the other hand, the viscosity of dispersions is determined by the solid content only and not by the molecular weight of the polymers used. Thus, waterbased UV-curable coatings are one strategy out of this dilemma in order to combine the flexibility of higher-molecular-weight polymers with the hardness of highly crosslinked acrylates. The mechanical data of conventional and waterbased UV coatings are discussed in dependency on glass transition temperature and elastically effective chain length between crosslinks.     

核壳聚合物负载茂金属催化剂及乙烯聚合

采用半连续种子乳液聚合法,得到了粒径为280 nm左右的以聚甲基丙烯酸甲酯 (PMMA)为核、聚苯乙烯(PS)为壳的PMMA/ PS核壳结构聚合物和以PS为核、PMMA为壳的PS/PMMA核壳结构聚合物.并分别以上述二种核壳聚合物为载体,超临界CO2为溶剂,采用超临界流体浸渍法负载二氯二茂钛(Cp2TiCl2)催化剂,得到PMMA/PS-Cp2TiCl2和PS/PMMA-Cp2TiCl2两种负载型的茂金属催化剂颗粒.通过对二种催化剂颗粒的乙烯淤浆聚合动力学的研究发现,PMMA/PS-Cp2TiCl2催化剂颗粒的聚合反应速度有很大的滞后效应,聚合最大反应速率出现在第9 min,而PS/PMMA-Cp2TiCl2催化剂颗粒动力学行为与Cp2TiCl2催化剂均相聚合相似.     

UV reactive polymers for refractive index modulation based on the photo-Fries rearrangement

In this study we report on the synthesis and characterization of photoreactive polymers which display large changes in their refractive index upon UV irradiation. These polymers contain aromatic ester groups which undergo a photo-Fries rearrangement from aryl esters to hydroxyketones. The polymers under investigation were poly(4-acetoxystyrene) and two derivatives of polynorbornene, poly(bicyclo[2.2.1]hept-5-ene-2-carboxylic acid, phenyl ester) and poly(bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid, diphenyl ester). The kinetics of the photoreaction was studied by FTIR spectroscopy. Ellipsometric measurements of thin films showed that the photo-Fries rearrangement causes a large increase of the refractive indices in these polymers (between +0.03 and +0.05). The modulation of the refractive index is of interest for applications in the field of optics and data storage. The photoreaction also leads to an increase in surface energy as evidenced by contact angle measurements with water and diiodomethane as test liquids.     

Synthesis and characterization of new thermally stable poly(ester‐imide)s derived from 2,2′‐bis(4‐trimellitimidophenoxy)biphenyl and 2,2′‐bis(4‐trimellitimidophenoxy)‐1,1′‐binaphthyl and various aromatic dihydroxy compounds

A series of new alternating aromatic poly(ester‐imide)s were prepared by the polycondensation of the preformed imide ring‐containing diacids, 2,2′‐bis(4‐trimellitimidophenoxy)biphenyl (2a) and 2,2′‐bis(4‐trimellitimidophenoxy)‐1,1′‐binaphthyl (2b) with various aromatic dihydroxy compounds in the presence of pyridine and lithium chloride. A model compound (3) was also prepared by the reaction of 2b with phenol, its synthesis permitting an optimization of polymerization conditions. Poly(ester‐imides) were fully characterized by FTIR, UV‐vis and NMR spectroscopy. Both biphenylene‐ and binaphthylene‐based poly(ester‐imide)s exhibited excellent solubility in common organic solvents such as tetrahydrofuran, m‐cresol, pyridine and dichloromethane. However, binaphthylene‐based poly(ester‐imide)s were more soluble than those of biphenylene‐based polymers in highly polar organic solvents, including N‐methyl‐2‐pyrrolidone, N,N‐dimethylacetamide, N,N‐dimethylformamide and dimethyl sulfoxide. From differential scanning calorimetry thermograms, the polymers showed glass‐transition temperatures between 261 and 315 °C. Thermal behaviour of the polymers obtained was characterized by thermogravimetric analysis, and the 10 % weight loss temperatures of the poly(ester‐imide)s was in the range 449–491 °C in nitrogen. Furthermore, crystallinity of the polymers was estimated by means of wide‐angle X‐ray diffraction. The resultant poly(ester‐imide)s exhibited nearly an amorphous nature, except poly(ester‐imide)s derived from hydroquinone and 4,4′‐dihydroxybiphenyl. In general, polymers containing binaphthyl units showed higher thermal stability but lower crystallinity than polymers containing biphenyl units. Copyright © 2005 Society of Chemical Industry     

Michael addition polymers from bisacetoacetates

Summary The Michael reaction was used to synthesize polymers from bisacetoacetyl esters and amides and a diacrylate. The reaction occurred readily at room temperature yielding semi-solid polymers with broad molecular weight distributions which narrowed as the reaction progressed. The polymers based on the amide had lower molecular weights than those based on the ester.     

Transition temperature control of liquid crystalline poly(heptene sulphone)s

Liquid crystalline poly(heptene sulphone)s containing cholesteryl undecylenic ester and cholestanyl undecylenic ester were synthesized. The polymers displayed cholesteric mesophases during thermal transition. The clearing temperatures were from 114 to 172 °C depending on the molar ratio of mesogenic esters in the polymers. Received: 27 March 1997/Revised: 24 June 1997/Accepted: 27 June 1997     

Thermosensitive and hydrolysis‐sensitive poly(organophosphazenes)

The lower critical solution temperature (LCST) properties and hydrolytic behaviour of thermosensitive biodegradable polyphosphazenes with monomethoxy‐poly(ethylene glycol), glycine ethyl ester and depsipeptide ethyl esters substituents have been studied. All the polymers synthesized show LCST properties. The LCSTs of the polymers are affected by the composition of the polymers and increase with the degradation of the polymers in aqueous solution. The higher content of depsipeptide ethyl esters in the polymers accelerates the LCST change and the degradation of the polymers in aqueous solution. Most polymers synthesized have half‐lives of less than 10 days in neutral solution. © 2002 Society of Chemical Industry     

Incorporation of different crystallizable amide blocks in segmented poly(ester amide)s

High molecular weight segmented poly(ester amide)s were prepared by melt polycondensation of dimethyl adipate, 1,4-butanediol and a symmetrical bisamide-diol based on ε-caprolactone and 1,2-diaminoethane or 1,4-diaminobutane. FT-IR and WAXD analysis revealed that segmented poly(ester amide)s based on the 1,4-diaminobutane (PEA(4)) give an α-type crystalline phase whereas polymers based on the 1,2-diaminoethane (PEA(2)) give a mixture of α- and γ-type crystalline phases with the latter being similar to γ-crystals present in odd-even nylons. PEA(2) and PEA(4) polymers with a hard segment content of 25 or 50 mol% have a micro-phase separated structure with an amide-rich hard phase and an ester-rich flexible soft phase. All polymers have a glass transition temperature below room temperature and melt transitions are present at 62-70 °C (T_m,1) and at 75-130 °C (T_m,2) with the latter being highest at higher hard segment content. The two melt transitions are ascribed to melting of crystals comprising single ester amide sequences and two or more ester amide sequences, respectively. These polymers have an elastic modulus in the range of 159-359 MPa, a stress at break in the range of 15-25 MPa combined with a high strain at break (590-810%). The thermal and mechanical properties are not influenced by the different crystalline structures of the polymers, only by the amount of crystallizable hard segment present.