初次处理 meaning in Chinese

original treatment

In addition , we also explored that : montmorillonite which has been treated by bs - 12 was treated secondly using mma by the method of emulsion reaction and prepared pvc / montmorillonite composite on the way of melt interaction again . by measuring xrd and mechanical properties and observing the section morphology of flexural sample through sem , we found that : after secondly treated , the intension and toughness of pvc / montmorillonite composite were greatly increased . the results indicated that using using montmorillonite can toughen and reinforce pvc effectively , so the study and application of it have a bright prospect
此外，还探讨了对经bs - 12初次处理过的蒙脱土，用甲基丙烯酸甲酯采用乳液聚合的方法进行二次处理，再次通过熔融法制成pvc蒙脱土插层复合材料，并通过x ?射线衍射测定和力学性能测试以及扫描电镜观察材料的断面形貌，结果发现，蒙脱土经甲基丙烯酸甲酯通过乳液聚合法二次处理后制成的复合材料与只用bs - 12初次处理的蒙脱土制成的复合材料相比，其强度和韧性得到了明显改善。