酚醛泡沫板脆性与粉化性能实验

Test Research on Brittleness and Pulverization Performance of Phenolic Foam Board

目的研究胶粘剂对酚醛泡沫板脆性与粉化性的危害,提出通过界面剂处理来阻断胶粘剂对酚醛泡沫板损害的方法.方法采用断裂力和回弹率两种方法测试酚醛泡沫板的脆性,砂纸粉末法测试酚醛泡沫板的粉化度,通过红外光谱研究两种性能变化的原因.结果 Ca(OH)2浸泡和胶粘剂粘结后出现紫红色物质均对泡沫板的脆性和粉化性能产生负面影响.经Ca(OH)2浸泡与原样相比断裂力减小,回弹率和粉化度增加,最大差值分别为8.12N、4.61%、3.24%.胶粘剂粘结后酚醛泡沫试样断裂力和回弹率均减小,粉化度增加,最大差值分别为20.58 N、7.25%、4.49%.自然晾晒、粘结胶粘剂潮湿养护和Ca(OH)2浸泡的酚醛泡沫板粉化度相对于原样依次增大,最大粉化度分别为12.56%、11.02%、8.91%、8.27%.结论界面剂的使用,有效地阻断了胶粘剂和酚醛泡沫板的直接接触,因此能够降低泡沫板脆性破坏与粉化增加速度,可以应用于工程实践中.

This paper studied the harm of adhesive to brittleness and pulverization of phenolic foam board and proposed a new method to interdict harm of adhesive by processing of adhesion agent. Using the fracture force and resilient ratio, the brittleness of phenolic foam board was tested. Pulverization degree of phenolic foam board was tested with sand paper powder method. Through the infrared spectrum, the change reason of two kinds of performance was studied. Results show that the fuchsia material has a negative impact on brit- tleness and pulverization performance of phenolic foam board, which generates by Ca（OH） 2 soaking and adhesive bonding. Compared with the same original sample, the fracture force of phenolic foam board soaked by Ca（OH） 2 is reduced; the resilient rate and pulverization degree are increased. The maximum differences are 8.12 N,4.61% and 3.24% ,respectively. The fracture force and resilient rate of the sample are reduced after adhesive bonding and pulverization degree is increased, the maximum difference of 20.58 N, 7.25% and 4.49% respectively. Compared with the sample after natural drying, adhesive bonding under humid condition and soaking by Ca（OH） 2 with the same original sample, the pulverization degree increases, the maximum differences are 12.56% ,11.02% ,8.91% and 8.27% ,respectively. It concludes that the use of interfacial agent can prevent direct contact between the adhesive and phenolic foam board, reduce the brittleness harm and pulverization speed, which can be applied in engineering practice.