瓷磚粘結(jié)劑現(xiàn)在已經(jīng)比較普遍了，南方城市用的更多一些，尤其對于吸水率比較低的瓷磚，粘結(jié)的效果會更好些。那么你知道影響
濟(jì)南瓷磚粘結(jié)劑粘度的原因有哪些嗎？
Ceramic tile adhesives are now more common, and are more commonly used in southern cities, especially for tiles with low water absorption, the bonding effect will be better. Do you know the reasons that affect the viscosity of Jinan ceramic tile adhesive?
1.極性
1. Polarity
一般說來膠粘劑和被粘體分子的極性影響著粘接強(qiáng)度，但并不意味著這些分子極性的增加就一定會提高粘接強(qiáng)度。從極性的角度出發(fā)為了提高粘接強(qiáng)度，與其改變膠粘劑和被粘體全部分子的極性，還不如改變界面區(qū)表面的極性。例如聚乙烯、聚丙烯、聚四氟乙烯經(jīng)等離子表面處理后，表面上產(chǎn)生了許多極性基團(tuán)，如羥基、羰基或羧基等，從而顯著地提高了可粘接性。
Generally speaking, the polarity of adhesive and adhesive molecules affects the bonding strength, but it does not necessarily mean that an increase in the polarity of these molecules will improve the bonding strength. From the perspective of polarity, in order to improve the bonding strength, it is better to change the polarity of the interface surface than to change the polarity of all molecules of the adhesive and the adherend. For example, after plasma surface treatment of polyethylene, polypropylene, and polytetrafluoroethylene, many polar groups such as hydroxyl, carbonyl, or carboxyl groups are generated on the surface, significantly improving their adhesiveness.
2.分子量
2. Molecular weight
聚合物的分子量(或聚合度)直接影響聚合物分子間的作用力，而分子間作用力的大小決定物質(zhì)的熔點(diǎn)和沸點(diǎn)的高低，對于聚合物決定其玻璃化轉(zhuǎn)變溫度Tg和溶點(diǎn)Tm.。所以聚合物無論是作為膠粘劑或者作為被粘體其分子量都影響著粘接強(qiáng)度。
The molecular weight (or degree of polymerization) of a polymer directly affects the intermolecular forces of the polymer, and the magnitude of the intermolecular forces determines the melting and boiling points of the substance. For polymers, it determines their glass transition temperature Tg and melting point Tm. So whether polymers are used as adhesives or as adherents, their molecular weight affects the bonding strength.
一般說來，分子量和粘接強(qiáng)度的關(guān)系于無支鏈線型聚合物的情況，包括兩種類型。種類型在分子量全范圍內(nèi)均發(fā)生膠粘劑的內(nèi)聚破壞，這時，粘接強(qiáng)度隨分子量的增加而增加，但當(dāng)分子量達(dá)到某一數(shù)值后則保持不變。
Generally speaking, the relationship between molecular weight and adhesive strength is limited to the case of unbranched linear polymers, including two types. The first type undergoes cohesive failure of the adhesive throughout the entire range of molecular weight. At this point, the adhesive strength increases with the increase of molecular weight, but remains unchanged when the molecular weight reaches a certain value.
第二種類型由于分子量不同破壞部分亦不同。這時，在小分子量范圍內(nèi)發(fā)生內(nèi)聚破壞，隨著分子量的增大粘接強(qiáng)度增大；當(dāng)分子量達(dá)到某一數(shù)值后膠粘劑的內(nèi)聚力同粘附力相等，則發(fā)生混合破壞；當(dāng)分子量再進(jìn)一步增大時，則內(nèi)聚力超過粘附力，浸潤性不好，則發(fā)生界面破壞。結(jié)果使膠粘劑為某一分子量時的粘接強(qiáng)度為值。
The second type also has different destructive parts due to different molecular weights. At this point, cohesive failure occurs within a small molecular weight range, and the bonding strength increases with the increase of molecular weight; When the molecular weight reaches a certain value and the cohesive force of the adhesive is equal to the adhesive force, mixing failure occurs; When the molecular weight further increases, the cohesion exceeds the adhesion force, and the wettability is poor, leading to interface failure. The result is that the adhesive strength reaches its maximum value at a certain molecular weight.
3.側(cè)鏈
3. Side chain
長鏈分子上的側(cè)基是決定聚合物性質(zhì)的重要因素，從分子間作用力考慮，聚合物支鏈的影響是，當(dāng)支鏈小時，增加支鏈長度，降低分子間作用力。當(dāng)支鏈達(dá)到一定長度后，開始結(jié)晶，增加支鏈長度，提高分子間作用力，這應(yīng)當(dāng)是降低或提高粘接強(qiáng)度的原因。
The side groups on long chain molecules are an important factor determining the properties of polymers. From the perspective of intermolecular forces, the effect of polymer branching is to increase the length of the branching chain and reduce the intermolecular forces when the branching chain is small. When the branch chain reaches a certain length, it begins to crystallize, increasing the length of the branch chain and increasing the intermolecular force, which should be the reason for reducing or improving the bonding strength.
The above explanation is the reason why the viscosity of Jinan ceramic tile adhesive is affected. We hope it can help you. If you have any doubts or needs, please come to our website http://www.wodeapartment.com consulting service
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