玻璃纤维(wei)(wei)增强的(de)(de)热固性(xing)(xing)树(shu)(shu)(shu)脂(zhi)(zhi)和(he)热塑性(xing)(xing)塑料(liao),既有 FRP 组份(fen)的(de)(de)结(jie)构牢固性(xing)(xing),又有热塑性(xing)(xing)塑料(liao)的(de)(de)耐化学性(xing)(xing)。本(ben)文即旨于(yu)介(jie)绍这类 PVC—FRP 复合(he)材料(liao)的(de)(de)研究(jiu)及其在管(guan)生产(chan)中(zhong)(zhong)的(de)(de)应用(yong)(yong)。在此(ci)应用(yong)(yong)中(zhong)(zhong),热塑性(xing)(xing)塑料(liao)是(shi)用(yong)(yong)作密(mi)封衬管(guan),把(ba)它与高强纤维(wei)(wei)缠(chan)绕(rao)(rao)的(de)(de)外(wai)壳结(jie)合(he)在一(yi)起。已研制出一(yi)种适用(yong)(yong)于(yu)纤维(wei)(wei)缠(chan)绕(rao)(rao)的(de)(de)特殊(shu)间苯型聚(ju)酯(zhi)树(shu)(shu)(shu)脂(zhi)(zhi),以保(bao)证与 PVC 有很好(hao)粘接。从经济效益上看,在所(suo)有的(de)(de)压(ya)力范(fan)(fan)围(wei)里,纤维(wei)(wei)缠(chan)绕(rao)(rao)的(de)(de) FRP,缠(chan)在薄壁的(de)(de) PVC 管(guan)上,成(cheng)本(ben)可比全 PVC 管(guan)适当(dang)的(de)(de)降低。特别(bie)是(shi)较(jiao)(jiao)大的(de)(de)管(guan)径及较(jiao)(jiao)高压(ya)力范(fan)(fan)围(wei)时,成(cheng)本(ben)低的(de)(de)优越性(xing)(xing)就更显著了(le)。纤维(wei)(wei)缠(chan)绕(rao)(rao) PVC 复合(he)管(guan)的(de)(de)性(xing)(xing)能与成(cheng)本(ben)的(de)(de)关系也业已确定(ding)。由于(yu)采用(yong)(yong)了(le) E—105树(shu)(shu)(shu)脂(zhi)(zhi)做胶接层(ceng),能使纤维(wei)(wei)缠(chan)绕(rao)(rao) PVC 复合(he)管(guan)进一(yi)步增强,用(yong)(yong)通(tong)用(yong)(yong)的(de)(de)聚(ju)酯(zhi)、乙烯基(ji)酯(zhi)树(shu)(shu)(shu)脂(zhi)(zhi)或环氧树(shu)(shu)(shu)脂(zhi)(zhi)进行纤维(wei)(wei)缠(chan)绕(rao)(rao)。纤维(wei)(wei)缠(chan)绕(rao)(rao)树(shu)(shu)(shu)脂(zhi)(zhi)要依据最终使用(yong)(yong)时的(de)(de)环境条件来选(xuan)择。另外(wai)改(gai)进性(xing)(xing)能,还可通(tong)过在树(shu)(shu)(shu)脂(zhi)(zhi)中(zhong)(zhong)添加填料(liao)或在纤维(wei)(wei)缠(chan)绕(rao)(rao)层(ceng)中(zhong)(zhong)添加砂(sha)子来实现(xian)(xian),采取这种办(ban)法,发现(xian)(xian)成(cheng)本(ben)增加不大,而(er) FRP 壁厚可增加两倍多,从而(er)极大地改(gai)进了(le)管(guan)的(de)(de)刚性(xing)(xing)和(he)冲击强度。
