高耐温性钢塑管材用热熔胶黏剂的制备及性能研究

以神华均聚聚丙烯（PP）为基体树脂,通过与聚烯烃弹性体（POE）共混反应挤出制备了高耐温性钢塑管材用热熔胶黏剂。研究了引发剂含量、接枝单体含量和PP/POE配比对热熔胶性能的影响,考察了自制热熔胶在实际应用中的耐温性能。结果表明,反应挤出制备的聚丙烯接枝马来酸酐(PP?g?MAH)基热熔胶综合性能优异,其剥离强度和100 %拉伸弹性回复率分别可达131.4 N/25 mm和65.5 %;高低温循环（-40~130 ℃）800次后自制热熔胶的剥离强度依然可以维持在122.2 N/25 mm,剥离失效率只有7.0 %,其耐温性明显优于选取的两个商业化牌号热熔胶。     

菱镁板吸塑用聚氨酯胶粘剂的研制

选用低聚物二元醇、二异氰酸酯、二元胺及硅烷偶联剂等合成了菱镁板吸塑聚氯乙烯(PVC)所需的聚氨酯胶粘剂。讨论了多元醇及二异氰酸酯种类、异氰酸酯指数、偶联剂加入方法和用量及胶粘剂相对分子质量等对聚氨酯胶粘性能的影响。结果表明,以聚酯多元醇(PNBA)、甲苯二异氰酸酯(TDI)、扩链剂(IPDA)和偶联剂(KH-550)等原料合成的聚氨酯胶粘剂性能优异,相对分子质量为25 000~40 000,黏度为200 mPa.s~600 mPa.s(固含量30%)。将其喷涂于菱镁板上,真空吸塑PVC后,初黏力大,24 h后终黏剥离强度可达到4.1 N/mm,已达到菱镁板或PVC的破坏程度,满足了使用需要。     

有机硅压敏胶的性能及影响因素

对有机硅压敏胶的几个影响因素进行了考察,在此基础上研制出一种有机硅压敏胶。乙烯基含量为0.3%的MQ硅树脂和相对分子质量为4.0×105的硅橡胶等比例配合,经1.0%的二丁基二月桂酸锡催化缩合,再以1.5%的BPO交联剂200℃下交联10min制得的有机硅压敏胶性能优异,初黏力25#,室温持黏力960min,剥离强度13.45N/25mm。     

微球型丙烯酸酯压敏胶的制备研究

采用悬浮聚合法制备了微球型丙烯酸压敏胶,以丙烯酸酯类单体为主体,在含有分散剂的水相中采用悬浮聚合的方法制备了粒径为10-100μm黏性聚合物微球.使用这种微球富集相按照一定比例调配自制的乳液,增稠剂及其他添加剂制得的压敏胶液用线棒涂布器涂布于纸等基材上烘干即得具有良好再剥离性的反复粘贴压敏胶.在吸取前人的经验并通过大量...     

紫外光固化可剥离胶的研究与制备

采用热塑性弹性体SIS与增黏树脂松香按一定比例混合制备基胶,向基胶中加入多官能团光敏树脂,两者混配制得紫外光固化可剥离胶。研究了热塑性弹性体与松香不同配比、光敏树脂的加入量对产品性能的影响,并通过初粘力、180°剥离强度测试对胶体力学性能进行了测试;通过红外分析测试(FTIR)、动态热机械分析DMA以及扫描电镜SEM对其黏结/剥离性能进行了表征。结果发现,当松香与SIS二者的质量比在(0.6:1)～(1:1)、光敏树脂与基胶有效成分两者质量比在(1.4:1)～(1.7:1)时,产品光固化前剥离强度可达6～12N/25mm,光固化后剥离强度骤降至不足1N/25mm,且被物表面无残胶。     

PP-R塑铝稳态复合管用热熔胶对铝粘接性能的研究

研究了无规共聚聚丙烯(PP-R)塑铝稳态复合管用热熔胶的主要成分对热熔胶和铝的粘接性能的影响.结果发现,当基材采用丙烯-乙烯-丁烯三元共聚物,且丙烯-乙烯-丁烯三元共聚物、马来酸酐接枝聚丙烯、乙烯类弹性体、石油树脂质量配比为60:25:10:5时,制备的PP-R塑铝稳态复合管用热熔胶对铝的粘接性能最好,剥离强度达到5....     

Dependence of Peel Adhesion on Molecular Weight of Epoxidized Natural Rubber

The effect of molecular weight of two grades of epoxidized natural rubber (ENR)—i.e., ENR 25 and ENR 50—on the peel strength of an adhesive is studied using coumarone-indene resin, gum rosin, and petro resin as tackifiers. Toluene and polyethylene terephthalate (PET) film acted as the solvent and substrate, respectively. A SHEEN hand coater was used to coat the adhesive on the substrate to give coating thicknesses of 30, 60, 90, and 120 µm. The peel strength of adhesive was determined using a Lloyd Adhesion Tester operating at 30 cm/min. Results show that peel strength has a maximum value at a molecular weight of 6.8 × 10⁴ and 3.9 × 10⁴ for ENR 25 and ENR 50, respectively, an observation which is attributed to the combined effects of wettability and mechanical strength of the rubber at the respective optimum molecular weight of ENR. Peel strength increases with coating thickness for all the tackifiers investigated, with a gum rosin-based adhesive exhibiting the highest peel strength.     

高强度飞机座舱软联接用聚氨酯胶黏剂的研制

介绍了一种飞机座舱边缘联接用双组份高强度聚氨酯胶黏剂,该胶室温胶接强度大于250kN/m,剥离强度大于3.0N/mm,120℃胶接强度为50kN/m,-60℃胶接强度为258kN/m.在水中浸泡72h后,其剥离强度略有增加,为3.50 N/mm,在航空煤油中浸泡72h后,剥离强度强度为3.07N/mm.并且探讨了合成...     

Peel Strength of Aluminium-Aluminium Joints Bonded by Adhesive Based on Carboxylated Nitrile Rubber-Chlorobutyl Rubber Blend

The peel strength of aluminium-aluminium joints bonded by an adhesive based on carboxylated nitrile rubber and chlorobutyl rubber was found to depend on surface topography and use of a silane primer. Anodization causes a marginal increase in bond strength while the silane primer improves the adhesive joint strength remarkably.

The peel strength was also found to be dependent on test conditions (test rate and temperature). The threshold peel strength value obtained by measurements at low peel rate and high test temperature was found to depend on the type of failure during peeling (cohesive or interfacial) which, in turn, is controlled by the presence of silica filler in the adhesive. Two different threshold values of peel strength were obtained: 60 N/m for interfacial failure (in silica-filled adhesive), 140 N/m for cohesive failure (in unfilled adhesive).     

氢化丙烯酸松香/丙烯酸酯复合乳液的制备及其压敏胶的性能

以氢化丙烯酸松香为增黏树脂,将其溶解在丙烯酸酯单体中,预乳化后采用半连续乳液聚合工艺制备了氢化丙烯酸松香/丙烯酸酯复合乳液。研究了氢化丙烯酸松香的用量对单体转化率、凝胶率、溶胶相对分子质量及其分布、乳胶膜的玻璃化温度(Tg)和压敏胶粘接性能等的影响。结果表明,氢化丙烯酸松香对单体聚合具有一定的阻聚作用,随着氢化丙烯酸松香用量的增加,单体转化率、凝胶率及相对分子质量下降,相对分子质量分布变窄。氢化丙烯酸松香的合适用量为8.0%wt,此时压敏胶的初黏力为15#,180°剥离强度为10.6N.25mm-1,持黏力大于120h。     

阳离子型光固化胶黏剂的增韧改性

用异氟尔酮二异氰酸酯(IPDI),聚四氢呋喃醚二醇(PTMG),丙烯酸羟乙酯(HEA)等原料合成了不同相对分子质量聚氨酯丙烯酸酯(PUA)。考察了不同相对分子质量的PUA对增韧及粘接强度的影响,并与端羧基液体丁腈橡胶(CTBN)及聚砜(PSF)增韧进行了比较。这三种增韧方法都能有效地提高环氧树脂基阳离子型光固化胶黏剂的剥离强度及压缩剪切强度,低相对分子质量的PUA-122增韧效果最为显著,15%的加入量使胶黏剂的剥离强度从0.39N/cm提高到13.2N/cm,配方优化后可以提高到17.8N/cm。动态热机械分析(DMA)对PUA、CTBN及PSF增韧后的玻璃化转变温度(Tg)进行分析表明,增韧剂的加入降低了固化物的Tg,PUA的增韧主要是以增柔的方式实现。     

PVC板门用单组份湿固化聚氨酯胶黏剂的研制

采用组合异氰酸酯和组合聚醚多元醇合成可室温固化的单组分聚氨酯胶黏剂。考察NCO／OH的物质的量比对贮存稳定性、反应时间、剥离强度的影响,并论述了引入TDI的作用以及组合溶剂的确定。通过优化配方,合成了用于粘接PVC板材和松木材的新型胶黏剂,并获得良好的粘接强度。结果表明：反应时间随着NCO／OH物质的量比的增大而增加;NCO／OH物质的量比低时,胶的贮存稳定性变差,当比值高时,胶的贮存稳定性好;NCO含量在9％时,胶的剥离强度最高;PAPI：TDI=7：3时,胶的剥离强度达到3．25N／mm。组合溶剂二氯甲烷：丙酮=5：1时,胶的剥离强度达到3．20N／mm。     

乳液型压敏胶的合成工艺研究

以丙烯酸酯为共聚单体,采用预乳液聚合方法制备了乳液型压敏胶。通过实验发现：乳液相对分子质量、软硬单体的配比、乳化剂、引发剂、pH值均对压敏胶的初黏力、剥离强度和持黏力有影响。聚合反应温度约84℃、反应体系pH值约8、软单体用量为93％时,乳液型丙烯酸酯类压敏胶的初黏力、剥离强度和持黏力最好,由此成功研制成黏结性能优异的环保型丙烯酸酯乳液型压敏胶。     

Beiträge zur galvanisierung von polymeren, 10. Metallisierung von copolymeren aus acrylnitril und butadien nach vorbehandlung mit ozon

Copolymers containing acrylonitrile and butadiene can be coated with metal electroless. There is only a small influence on the metal-to-polymer-adhesion with the time of treatment with ozone. The adhesion increases with the content of acrylonitrile and with the molecular weight of the polymer. Peel strength values have been measured up to 150 N/25 mm because of the cohesive fracture inside the polymer. The highest values of adhesion have been measured on samples having nearly the same values of the critical surface tension like those of the electroless deposited nickel-layer. Caverns supporting a mechanical staying of the metal have not been observed.     

Knowledge-based control of emulsion polymerization: Tailoring adhesive properties

An on-line control strategy to produce copolymer latexes with desired adhesive properties (resistance to shear and resistance to peel) has been developed. The strategy required a quantitative model relating adhesive properties and molecular weight distribution that was built using partial least squares regression. The model was used to determine the set-point trajectories of the monomers and chain transfer agent that are used as manipulated variables in the control strategy. The control strategy was experimentally verified to produce an n-butyl acrylate/styrene copolymer latex with a resistance to shear of 1310 s and resistance to peel of 3.1 N/100 mm.     

汽车车灯用湿气固化聚氨酯热熔胶

用多元醇、二苯基甲烷4,4-二异氰酸酯（MDI）合成了车灯用湿固化聚氨酯热熔胶粘剂。研究了胶粘剂的粘度、粘度稳定性和初粘力等性能。结果表明：当高结晶性聚酯和热塑性聚酯用量在10%和15%时,胶粘剂剥离强度达到980N/25mm,耐热性达到180℃,基本上满足了汽车灯具密封与装配的要求。     

车灯用反应型聚氨酯热熔胶的研制

以多元醇、二苯基甲烷4,4′-二异氰酸酯(MDI)为原料,合成了湿固化反应型聚氨酯热熔胶黏剂用于汽车车灯粘接,研究了胶黏剂的黏度、黏度稳定性和初黏力等性能。结果表明,当高结晶性聚酯和热塑性聚酯用量在10%和15%时,胶黏剂剥离强度达到980N/25mm,耐热性达到180℃,满足了汽车灯具密封与装配的要求。     

Effect of modified phenolic resin on crosslinked network and performances of polyvinyl acetate blending emulsion

The water‐soluble phenolic resin (PF) and the poly(vinyl alcohol) (PVA) modified phenolic resin (PPF) were synthesized by alkali catalysis method. Both were used as curing agents to blend with the polyvinyl acetate (PVAc) emulsion. The obtained PF, PPF and blending emulsion were characterized by FT‐IR, DSC, DLS, TEM, and viscosity analysis. The thermal stability of latex films was enhanced after blending. When the PF and PPF content was up to 15 wt %, the peel strength of the blending emulsion increased from 17.89 N/25 mm to 21.32 N/25 mm and 23.37 N/25 mm and the shear impact strength were 1.4 and 1.6 times that of unmodified emulsion adhesive, respectively. Moreover, the modification effect of PPF was better than PF due to its tough crosslinked network. Finally, layer cohesion played an increasingly important role in bonding forces with the increment of the PPF content by the glue residue analysis. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46448.     

Preparation and properties of environment-friendly acrylic latex laminating adhesives applied in plastic/plastic composite films

Acrylic latex laminating adhesives (ALLAs) were successfully prepared via a monomer-starved seeded semi-continuous emulsion polymerization with butyl acrylate (BA), methyl methacrylate (MMA), styrene (St), acrylamide (Am), and methacrylate glycidyl ether (GMA) as monomers. Impacts of GMA on the final latex, the dried latex films and the adhesive properties of ALLAs were investigated, respectively. The results indicated that the increase of GMA contents in the pre-emulsion feed has no apparent effect on the final latex average particle size and size distribution, while the gel contents, glass transition temperature (T_g) and water contact angle of the ALLAs gradually increased, and the molecular weight (M_n, M_w) obviously increased. Additionally, as the amount of GMA increased from 0 to 10?wt%, the maximum peel strength of the composite films reached 3.72 N/15mm with 5?wt% GMA contents. When heated to 65?°C, the peel strength of the composite films with 5?wt% of GMA can still maintain an acceptable peel strength (2.51 N/15mm) for application, showing excellent adhesive performance and heat resistance properties.     

Molecular design and hygrothermal resistance of high-toughness polysiloxane–polyurethane block copolymer composite adhesives

With the development of new energy sources, the demand for aluminum composite films for power batteries is expanding; at the same time, higher requirements have been put forward for aluminum composite films and adhesives. Polyurethane, as the binder of aluminum composite films, strongly affects the performance of aluminum composite films when exposed to moisture and high temperature and can lead to delamination. This thesis prepares a polyurethane and silicone block copolymer composite adhesive by adjusting the ratio of hard and soft polyurethane segments to obtain polyurethane (PU) with excellent flexibility. On the basis of block copolymerization with bis-amino-terminated organosiloxane (ATPS), obtained excellent flexibility, high peel strength, moisture resistance, and heat resistance from a polysiloxane-based polyurethane composite adhesive (PUSR). The properties are also tested using tensile tests and peel strength tests. The test results show that by adjusting the ATPS content, the flexibility and hydrophobicity of the PUSR composite adhesive further improved, with a tensile strength of 36 MPa, an elongation at break of 757%, and bonding performance of 11 N/15 mm. Additionally, the damp heat resistance of 6 N/15 mm, exceeding the international standard of 3 N/15 mm, in the power battery soft package aluminum–plastic film has potential application prospects.