玻璃(li)纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)增(zeng)强(qiang)(qiang)的(de)热(re)固(gu)性(xing)(xing)(xing)树(shu)脂(zhi)和(he)(he)热(re)塑(su)性(xing)(xing)(xing)塑(su)料(liao),既有 FRP 组份的(de)结(jie)构牢(lao)固(gu)性(xing)(xing)(xing),又有热(re)塑(su)性(xing)(xing)(xing)塑(su)料(liao)的(de)耐化(hua)学(xue)性(xing)(xing)(xing)。本文即旨于(yu)(yu)介绍这(zhei)类 PVC—FRP 复合材料(liao)的(de)研(yan)究及其(qi)在(zai)(zai)(zai)管(guan)生(sheng)产中的(de)应用(yong)。在(zai)(zai)(zai)此应用(yong)中,热(re)塑(su)性(xing)(xing)(xing)塑(su)料(liao)是用(yong)作密封(feng)衬(chen)管(guan),把它(ta)与高强(qiang)(qiang)纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕的(de)外(wai)(wai)壳(qiao)结(jie)合在(zai)(zai)(zai)一(yi)(yi)起。已(yi)(yi)研(yan)制出一(yi)(yi)种适用(yong)于(yu)(yu)纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕的(de)特殊间苯(ben)型聚酯(zhi)树(shu)脂(zhi),以(yi)保证与 PVC 有很好粘接。从经济效益(yi)上看,在(zai)(zai)(zai)所有的(de)压力范(fan)(fan)围(wei)里,纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕的(de) FRP,缠(chan)(chan)(chan)在(zai)(zai)(zai)薄壁的(de) PVC 管(guan)上,成(cheng)本可比全 PVC 管(guan)适当的(de)降低。特别(bie)是较(jiao)大(da)的(de)管(guan)径及较(jiao)高压力范(fan)(fan)围(wei)时(shi),成(cheng)本低的(de)优越性(xing)(xing)(xing)就更显(xian)著了。纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕 PVC 复合管(guan)的(de)性(xing)(xing)(xing)能(neng)与成(cheng)本的(de)关系(xi)也业已(yi)(yi)确定。由于(yu)(yu)采(cai)(cai)用(yong)了 E—105树(shu)脂(zhi)做胶接层,能(neng)使(shi)纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕 PVC 复合管(guan)进(jin)一(yi)(yi)步增(zeng)强(qiang)(qiang),用(yong)通(tong)用(yong)的(de)聚酯(zhi)、乙烯基酯(zhi)树(shu)脂(zhi)或环氧树(shu)脂(zhi)进(jin)行(xing)纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕。纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕树(shu)脂(zhi)要依据最终(zhong)使(shi)用(yong)时(shi)的(de)环境条件来选择。另外(wai)(wai)改进(jin)性(xing)(xing)(xing)能(neng),还可通(tong)过在(zai)(zai)(zai)树(shu)脂(zhi)中添(tian)加(jia)(jia)填料(liao)或在(zai)(zai)(zai)纤(xian)(xian)(xian)维(wei)(wei)(wei)(wei)(wei)缠(chan)(chan)(chan)绕层中添(tian)加(jia)(jia)砂子来实(shi)现,采(cai)(cai)取(qu)这(zhei)种办法,发现成(cheng)本增(zeng)加(jia)(jia)不大(da),而 FRP 壁厚可增(zeng)加(jia)(jia)两倍(bei)多,从而极大(da)地改进(jin)了管(guan)的(de)刚性(xing)(xing)(xing)和(he)(he)冲击强(qiang)(qiang)度。
