玻璃纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)增(zeng)(zeng)强的(de)(de)(de)热(re)(re)(re)固(gu)性(xing)(xing)(xing)树(shu)(shu)脂和(he)热(re)(re)(re)塑(su)性(xing)(xing)(xing)塑(su)料(liao),既有(you) FRP 组份的(de)(de)(de)结(jie)构牢固(gu)性(xing)(xing)(xing),又有(you)热(re)(re)(re)塑(su)性(xing)(xing)(xing)塑(su)料(liao)的(de)(de)(de)耐化学性(xing)(xing)(xing)。本(ben)文(wen)即旨于介绍这类(lei) PVC—FRP 复(fu)合(he)(he)材料(liao)的(de)(de)(de)研(yan)究及其在(zai)(zai)(zai)管(guan)(guan)生(sheng)产中(zhong)的(de)(de)(de)应用(yong)。在(zai)(zai)(zai)此应用(yong)中(zhong),热(re)(re)(re)塑(su)性(xing)(xing)(xing)塑(su)料(liao)是(shi)用(yong)作密(mi)封衬管(guan)(guan),把它与高(gao)(gao)强纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao)的(de)(de)(de)外(wai)壳结(jie)合(he)(he)在(zai)(zai)(zai)一起。已(yi)研(yan)制出一种(zhong)适用(yong)于纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao)的(de)(de)(de)特殊间苯型(xing)聚(ju)酯(zhi)树(shu)(shu)脂,以保证与 PVC 有(you)很好粘接(jie)。从经济(ji)效益上(shang)看,在(zai)(zai)(zai)所有(you)的(de)(de)(de)压(ya)(ya)力范(fan)围(wei)里,纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao)的(de)(de)(de) FRP,缠(chan)(chan)(chan)在(zai)(zai)(zai)薄壁的(de)(de)(de) PVC 管(guan)(guan)上(shang),成(cheng)(cheng)本(ben)可(ke)比(bi)全 PVC 管(guan)(guan)适当的(de)(de)(de)降低(di)。特别是(shi)较大的(de)(de)(de)管(guan)(guan)径及较高(gao)(gao)压(ya)(ya)力范(fan)围(wei)时,成(cheng)(cheng)本(ben)低(di)的(de)(de)(de)优越性(xing)(xing)(xing)就(jiu)更显著了(le)(le)。纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao) PVC 复(fu)合(he)(he)管(guan)(guan)的(de)(de)(de)性(xing)(xing)(xing)能(neng)与成(cheng)(cheng)本(ben)的(de)(de)(de)关系也业已(yi)确定。由于采用(yong)了(le)(le) E—105树(shu)(shu)脂做胶接(jie)层,能(neng)使(shi)纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao) PVC 复(fu)合(he)(he)管(guan)(guan)进一步增(zeng)(zeng)强,用(yong)通(tong)用(yong)的(de)(de)(de)聚(ju)酯(zhi)、乙烯(xi)基酯(zhi)树(shu)(shu)脂或环氧树(shu)(shu)脂进行纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao)。纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao)树(shu)(shu)脂要依据最终使(shi)用(yong)时的(de)(de)(de)环境条件来(lai)选择(ze)。另外(wai)改进性(xing)(xing)(xing)能(neng),还可(ke)通(tong)过在(zai)(zai)(zai)树(shu)(shu)脂中(zhong)添加填料(liao)或在(zai)(zai)(zai)纤(xian)(xian)(xian)(xian)(xian)维(wei)(wei)缠(chan)(chan)(chan)绕(rao)(rao)(rao)层中(zhong)添加砂子来(lai)实现,采取这种(zhong)办(ban)法,发现成(cheng)(cheng)本(ben)增(zeng)(zeng)加不大,而 FRP 壁厚可(ke)增(zeng)(zeng)加两(liang)倍(bei)多,从而极大地改进了(le)(le)管(guan)(guan)的(de)(de)(de)刚性(xing)(xing)(xing)和(he)冲击强度。
