Three water - soluble acrylic resins are prepa red by polymerizing esters acrylate , acrylic acid ， methylacrylic acid ， esters methylacrylate with phenyl - ethene or ethylene acetate in present of water or alcohol and initiating agent . properties of the acrylic resins are characterized . results show that the resins possess excellent character , i . e . adhibity , water - solubility , expansion after dry for water ， anti acidity or bascity and brightness in the products of same type 以丙烯酸、丙烯酸酯、甲基丙烯酸、甲基丙烯酸酯等作为基料，在引发剂的存在下，以水或醇作溶剂进行聚合，加入苯乙烯、醋酸乙烯等改性，合成了3种不同的水溶性丙烯酸改性树脂，并对其性能进行了测定.结果表明：这3种树脂的粘度、水溶解性、干燥后膜的吸胀性、抗酸碱性、光亮度等性能均优于同类产品
The unconfined compressive strength , shearing strength and permeabi lity of stabilized soils were tested in laboratory , the strength of contaminated composite soils sampled with different ph and soaped in corresponding ph were compared . the results from experiments indicate that there exists a certain relationship between the soft soil properties and the unconfined compressive of grouted soil . with the increase of water content , porosity ratio , degree of porosity , plasticity limit , liquid limit and liquid index , the compressive strength of cement - sodium silicate - stabilized soil decreases , while increases as the bulk weight and compressibility modulus 通过对水泥?水玻璃加固土的无侧限抗压强度试验，以及用不同酸碱性水制成与养护的固结土所进行强度对比试验，得出软土的物理力学性质指标与加固土的抗压强度之间存在一定的相关关系，即随着含水量、孔隙比、孔隙度、液塑限及液性指数的增加，水泥?水玻璃加固土的抗压强度相应地降低；而随着原状土的容重、压缩模量的增加，水泥土的抗压强度也随之增加。
Through a model compound system , acid - base theory for rtv - i silicone rubber was gave . it isbelieved consistency in acidic or basic nature is benefit for rtv - lsilicone compound system , while adverse nature in acid or base will cause unstable compound system and even cause gel . this is summarized as abn rule for matching 本文通过对模型体系的研究，提出了单组份室温硫化硅橡胶的酸碱理论，该理论认为rtv - 1体系各组份的酸碱性一致对体系稳定性有利，酸碱性相反将倾向于诱发硫化，总结为abn规则。
